24 Years of excellence in Pipes, Fittings, Flanges & Plates of SS, CS, AS & Alloys.
CARBON STEEL & STAINLESS STEEL FLANGE MANUFACTURER IN INDIA
Alliance Pipes & Fittings – Leading Carbon Steel & Stainless Steel Flange Manufacturer in India
ALLIANCE PIPES AND FITTINGS is leading manufacturer & exporter of Carbon Steel & Stainless Steel Flange in Mumbai, India. High-quality forged & plate flanges per ASME & ASTM.
Alliance Pipes & Fittings is a leading manufacturer, stockist, and exporter of high-quality steel forged flange and steel plate flange in India. With decades of experience in the steel industry, we specialize in producing flange that meet stringent industrial standards, including ASME, ASTM, BIS, DIN, EN, BS, JIS and API specifications.
Our product range includes slip-on flanges, blind flanges, weld neck flanges, socket weld flanges, threaded flanges, and custom-designed plate flanges, manufactured from premium carbon steel, stainless steel, alloy steel, duplex steel, super duplex steel, and special alloys. Each flange is produced from prime steel plates or forged materials, ensuring superior mechanical strength, durability, and reliability for critical applications in oil & gas, petrochemical, power, chemical, water treatment, and industrial piping systems.
Alliance Pipes & Fittings follows a strict quality control process, with testing at every stage of production. We provide full traceability of materials, and our flanges are supplied with proper certifications and heat number correlation. Our in-house manufacturing capabilities allow us to deliver custom sizes, special dimensions, and high-pressure flanges tailored to specific project requirements.
By choosing Alliance Pipes & Fittings, clients benefit from:
- Largest stock of Stainless Steel and Carbon Steel Flanges in Mumbai, India
- Compliance with international standards (ASME, ASTM, DIN, EN)
- Precision machining for perfect alignment and tight sealing
- High-quality materials with excellent corrosion and temperature resistance
- Timely delivery and competitive pricing
- Exporting to UAE, Saudi Arabia, Kuwait, Qatar, Oman, Europe and Africa
- Custom flanges available as per drawing or project specification
- 100% traceability with heat number correlation on every product
We are trusted by industries across India, the Middle East, and global markets, providing reliable and premium steel flanges that ensure seamless performance in critical piping and pressure systems.
Types of Forged & Plate Flange Manufactured:
- Slip-On Welding Flange (SORF/SOW/SOFF)
- Lapped Joint Flange (SOLJ/LJFF)
- Socket Welding Flange (SWRF/SWFF)
- Welding Neck Flange (WNRF/WNFF/WNRTJ)
- Blind Flange (BLRF/BLFF/BLRTJ)
- NPT / BSP Threaded Flange (SCRF/SCFF)
- Spectacle Blind Flange / Figure 8 Blank Flange (SBRF/SBFF)
- Orifice Flange
- Long Weld Neck Flange (LWNRF)
- Loose Flange / Backing Ring Flange (SOFF)
- Paddle Spacer / Ring Spacer
- Paddle Blank / Spades
- Orifice Plate
- Flangeolet
- Nipoflange
- Studding Outlet
- Forged Ring
Why Are Flanges Used in Piping Systems, Storage Tanks, Industrial Fittings & Pipe Spools?
Flanges are essential mechanical components used to connect pipes, valves, pumps, instruments, storage tanks, pressure vessels, and fabricated pipe spools using bolted and gasketed joints. They provide leak-proof performance, high mechanical strength, and easy access for inspection and maintenance. Flanges are widely preferred in industrial piping because they can be dismantled and reassembled without cutting or welding pipes.
Major Reasons Why Flanges Are Used
• Easy assembly and disassembly for shutdowns, repairs, and modifications
• Leak-proof sealing using suitable gasket types
• Strong mechanical joint to handle internal pressure, vibrations, and temperature
• Ensures accurate alignment between connected components
• Supports modular construction and future piping expansion
• Interchangeable design as per ASME, DIN, EN, and JIS standards
• Available in various materials suitable for high-temperature and corrosive services
Flanges eliminate the need for fully welded joints where frequent maintenance is required.
Application Areas of Flanges
- Piping Systems
Flanges are used as connecting points in process pipelines for oil, gas, steam, water, and chemicals. They ensure operational safety and help in quick access for cleaning, hydro testing, and inspection during plant shutdowns.
- Storage Tanks & Pressure Vessels
Flanges are used for tank nozzles, manways, vents, drains, and instrumentation connections. They provide secure sealing and easy operational access in pressurized and hazardous service environments.
- Flanged Pipe Fittings
Flanges are used to assemble elbows, tees, reducers, valves, strainers, flow meters, and specialty fittings. This allows faster replacement of components and improves system reliability in critical service lines.
- Pipe Spools & Modular Skid Assemblies
Flanges enable fast installation of pre-fabricated pipe spools at project sites. This reduces manpower needs, improves project delivery time, and ensures high-quality fabrication done under controlled workshop conditions.
Industries Where Flanges Are Widely Used
• Oil & Gas Refinery and Petrochemicals
• Chemical Industries and Pharmaceuticals
• Power Plants and Desalination Units
• Fertilizers, Steel Plants and Mining
• Marine, Shipbuilding and Offshore Platforms
• Food Processing and Water Treatment Plants
Flanges are crucial for maintaining operational safety and integrity in industrial facilities.
Common Flange Materials
• Stainless Steel: 304/304L, 316/316L, 321, 347, 904L
• Carbon Steel: ASTM A105, A350 LF2, A516 Gr.70
• Alloy Steel, Duplex and Super Duplex Steel
• Inconel, Monel, Hastelloy and Nickel Alloy Flanges
• Galvanized and Non-Ferrous Metals for special services
Material selection depends on corrosion, pressure rating, and working temperature of the application.
Certifications & Standards
• ASME B16.5: ½” to 24”
• ASME B16.47 Series A & B: 26” to 60”
• Pressure Rating: 150#, 300#, 600#, 900#, 1500#, 2500#
• NACE MR0175 / MR0103, IBR, PED compliance available
All flanges can be supplied with MTC EN 10204 3.1 / 3.2 as required.
Why Flanges Instead of Welding?
• Quick dismantling for inspection and cleaning
• Easier replacement of equipment and fittings
• Better alignment during construction and modifications
• Saves shutdown time and reduces installation cost
Flanges help extend the life of the piping system by reducing operational challenges during maintenance.
Additional Important Points to Know About Flanges
Types of Flange Facing & Their Purpose
Different flange facings help achieve specific types of sealing performance:
- RF (Raised Face): Most common; gasket sits on a raised surface
- FF (Flat Face): Used with cast iron or fiberglass flanges to prevent bending
- RTJ (Ring Type Joint): For extreme pressure, temperature, and gas-tight sealing
- Male & Female (M/F): Controlled gasket compression
- Tongue & Groove (T/G): Ideal for repetitive opening, ensures accurate alignment
Surface Finish & Roughness Requirements
- Proper gasket seating depends on machined serrated finish (125–500 AARH)
- Too smooth = leakage
- Too rough = damages gasket
Ensuring correct groove pattern avoids failure in high-pressure services.
Selection of Gasket Materials
Gasket choice affects sealing performance:
- Spiral Wound Gaskets — common in refinery service
- RTJ Metal Gaskets — high-pressure / high-temperature
- Compressed Fibre / Rubber — low-pressure and water lines
- PTFE & Graphite — chemical & thermal resistance
Right gasket = Extended service life + Zero leakage
Bolt Tightening & Torque Requirements
- Uniform tightening prevents leakage, bending & stress concentration
- Torque values depend on:
- Bolt grade (B7, B8, B16 etc.)
- Pressure class
- Gasket material
- Lubrication factor
Incorrect bolting is a major cause of flange joint failure.
Pressure Classes & Their Strength Behavior
ASME pressure ratings: 150#, 300#, 600#, 900#, 1500#, 2500#
Higher class = Designed for higher pressure & temperature
Example: Class 150 may suit chilled water lines,
Class 2500 needed for high-pressure hydrocarbon pipelines.
Heat Treatment & Manufacturing Grades
- Common forging standards: ASTM A105, A182, A350 LF2 etc.
- Heat treatment improves:
✅ Strength
✅ Ductility
✅ Grain structure
✅ Corrosion resistance
HIC / NACE requirements critical for sour gas environments.
Tolerance & Machining Accuracy
Tolerances ensure perfect alignment with pipes & fittings:
- Bolt hole circle accuracy
- Thickness uniformity
- Straightness & perpendicularity to bore
Poor tolerances = Misalignment = vibration & leak problems
Coating & Corrosion Protection
Surface protection options:
- Hot-Dip Galvanizing (HDG)
- Zinc plating & epoxy coating
- PTFE / FBE coating for chemical pipelines
- Rust preventive oil coating
Required for marine & outdoor installations.
Flange Markings & Identification
Every flange must be marked with:
- Manufacturer name or logo
- Size & schedule
- Pressure class
- Grade & specification
- Heat number
Guarantees traceability for quality assurance.
Common Reasons for Flange Failure
- Improper gasket selection
- Uneven bolt tightening
- Damaged flange face finish
- Thermal expansion ignored
- Incorrect pressure rating selection
Proper QA ensures long service reliability.
📩 Send us your inquiry — Contact Alliance Pipes & Fittings for competitive quotes and quick deliveries!
Material Specification:
Stainless Steel Forged Flange:
- Stainless Steel Forged Flange ASTM A 182 Gr. F304 / UNS S30400 - ASME SA 182 Gr. F304 / UNS S30400
- Stainless Steel Forged Flange ASTM A 182 Gr. F304L / UNS S30403 - ASME SA 182 Gr. F304L / UNS S30403
- Stainless Steel Forged Flange ASTM A 182 Gr. F304H / UNS S30409 - ASME SA 182 Gr. F304H / UNS S30409
- Stainless Steel Forged Flange ASTM A 182 Gr. F310 / UNS S31000 - ASME SA 182 Gr. F310 / UNS S31000
- Stainless Steel Forged Flange ASTM A 182 Gr. F310H / UNS S31009 - ASME SA 182 Gr. F310H / UNS S31009
- Stainless Steel Forged Flange ASTM A 182 Gr. F316 / UNS S31600 - ASME SA 182 Gr. F316 / UNS S31600
- Stainless Steel Forged Flange ASTM A 182 Gr. F316L / UNS S31603 - ASME SA 182 Gr. F316L / UNS S31609
- Stainless Steel Forged Flange ASTM A 182 Gr. F316H / UNS S31609 - ASME SA 182 Gr. F316H / UNS S31609
- Stainless Steel Forged Flange ASTM A 182 Gr. F316Ti / UNS S31635 - ASME SA 182 Gr. F316Ti / UNS S31635
- Stainless Steel Forged Flange ASTM A 182 Gr. F317L / UNS S31703 - ASME SA 182 Gr. F317L / UNS S31703
- Stainless Steel Forged Flange ASTM A 182 Gr. F321H / UNS S32109 - ASME SA 182 Gr. F321H / UNS S32109
- Stainless Steel Forged Flange ASTM A 182 Gr. F347H / UNS S34709 - ASME SA 182 Gr. F347H / UNS S34709
- Stainless Steel Forged Flange ASTM A 182 Gr. F904L / UNS N08904 - ASME SA 182 Gr. F904L / UNS N08904
- Stainless Steel Forged Flange ASTM A 182 Gr. F20 / UNS N08020 / Alloy 20 - ASME SA 182 Gr. F20 / UNS N08020 / Alloy 20
- Stainless Steel Forged Flange ASTM A 182 Gr. F44 / UNS S31254 / 254 SMO / 6Mo - ASME SA 182 Gr. F44 / UNS S31254 / 254 SMO / 6Mo
Stainless Steel Plate Flanges:
- Stainless Steel Plate Flange ASTM A 240 TP 304 / UNS S30400 - ASME SA 240 TP 304 / UNS S30400
- Stainless Steel Plate Flange ASTM A 240 TP 304L / UNS S30403 - ASME SA 240 TP 304L / UNS S30403
- Stainless Steel Plate Flange ASTM A 240 TP 304H / UNS S30409 - ASME SA 240 TP 304H / UNS S30409
- Stainless Steel Plate Flange ASTM A 240 TP 310S / UNS S31008 - ASME SA 182 Gr. 310S / UNS S31008
- Stainless Steel Plate Flange ASTM A 240 TP 316 / UNS S31600 - ASME SA 240 TP 316 / UNS S31600
- Stainless Steel Plate Flange ASTM A 240 TP 316L / UNS S31603 - ASME SA 240 TP 316L / UNS S31603
- Stainless Steel Plate Flange ASTM A 240 TP 316H / UNS S31609 - ASME SA 240 TP 316H / UNS S31609
- Stainless Steel Plate Flange ASTM A 240 TP 316Ti / UNS S31635 - ASME SA 240 TP 316Ti / UNS S31635
- Stainless Steel Plate Flange ASTM A 240 TP 317L / UNS S31703 - ASME SA 240 TP 317L / UNS S31703
- Stainless Steel Plate Flange ASTM A 240 TP 321H / UNS S32109 - ASME SA 240 TP 321H / UNS S32109
- Stainless Steel Plate Flange ASTM A 240 TP 347H / UNS S34709 - ASME SA 240 TP 347H / UNS S34709
- Stainless Steel Plate Flange ASTM A 240 TP UNS S31254 / 254 SMO / 6Mo - ASME SA 240 TP UNS S31254 / 254 SMO / 6Mo
- Stainless Steel Plate Flange ASTM A 240 TP UNS N08904 / 904L - ASME SA 240 TP UNS N08904 / 904L
- Stainless Steel Plate Flange ASTM A 240 TP UNS N08020 / Alloy 20 - ASME SA 240 TP UNS N08020 / Alloy 20
Duplex Stainless Steel (DSS) Forged Flanges:
- Duplex Stainless Steel Forged Flange ASTM A 182 Gr. F51 / UNS S31803 - ASME SA 182 Gr. F51 / UNS S31803
- Duplex Stainless Steel Forged Flange ASTM A 182 Gr. F60 / UNS S32205 - ASTM A 182 Gr. F60 / UNS S32205
Duplex Stainless Steel (DSS) Plate Flanges:
- Duplex Stainless Steel Plate Flange ASTM A 240 TP UNS S31803 - ASME SA 240 TP UNS S31803
- Duplex Stainless Steel Plate Flange ASTM A 240 TP 2205 / UNS S32205 - ASME SA 240 TP 2205 / UNS S32205
Super Duplex Stainless Steel (SDSS) Forged Flanges:
- Super Duplex Stainless Steel Forged Flange ASTM A 182 Gr. F53 / UNS S32750 - ASME SA 182 Gr. F53 / UNS S32750
- Super Duplex Stainless Steel Forged Flange ASTM A 182 Gr. F55 / UNS S32760 - ASME SA 182 Gr. F55 / UNS S32760
Super Duplex Stainless Steel (SDSS) Plate Flanges:
- Super Duplex Stainless Steel Plate Flange ASTM A 240 TP UNS S32750 - ASME SA 240 TP UNS S32750
- Super Duplex Stainless Steel Plate Flange ASTM A 240 TP UNS S32760 - ASME SA 240 TP UNS S32760
Alloy Steel Forged Flanges:
- Alloy Steel Forged Flange ASTM A 182 Gr. F5 / UNS K41545 - ASME SA 182 Gr. F5 / UNS K41545
- Alloy Steel Forged Flange ASTM A 182 Gr. F9 / UNS K90941 - ASME SA 182 Gr. F9 / UNS K90941
- Alloy Steel Forged Flange ASTM A 182 Gr. F11 Class 1 / UNS K11597 - ASME SA 182 Gr. F11 Class 1 / UNS K11597
- Alloy Steel Forged Flange ASTM A 182 Gr. F11 Class 2 / UNS K11572 - ASME SA 182 Gr. F11 Class 2 / UNS K11572
- Alloy Steel Forged Flange ASTM A 182 Gr. F11 Class 3 / UNS K11572 - ASME SA 182 Gr. F11 Class 3 / UNS K11572
- Alloy Steel Forged Flange ASTM A 182 Gr. F22 Class 1 / UNS K21590 - ASME SA 182 Gr. F22 Class 1 / UNS K21590
- Alloy Steel Forged Flange ASTM A 182 Gr. F22 Class 3 / UNS K21590 - ASME SA 182 Gr. F22 Class 3 / UNS K21590
- Alloy Steel Forged Flange ASTM A 182 Gr. F91 Type 1 / UNS K90901 - ASME SA 182 Gr. F91 Type 1 / UNS K90901
- Alloy Steel Forged Flange ASTM A 182 Gr. F91 Type 2 / UNS K90901 - ASME SA 182 Gr. F91 Type 2 / UNS K90901
- Alloy Steel Forged Flange ASTM A 182 Gr. F92 / UNS K92460 - ASME SA 182 Gr. F92 / UNS K92460
Carbon Steel Forged Flanges:
- Carbon Steel Forged Flange ASTM A 105 - ASME SA 105
- Carbon Steel Forged Flange ASTM A 694 Gr. F42 - ASME SA 694 Gr. F42
- Carbon Steel Forged Flange ASTM A 694 Gr. F46 - ASME SA 694 Gr. F46
- Carbon Steel Forged Flange ASTM A 694 Gr. F48 - ASME SA 694 Gr. F48
- Carbon Steel Forged Flange ASTM A 694 Gr. F50 - ASME SA 694 Gr. F50
- Carbon Steel Forged Flange ASTM A 694 Gr. F52 - ASME SA 694 Gr. F52
- Carbon Steel Forged Flange ASTM A 694 Gr. F56 - ASME SA 694 Gr. F56
- Carbon Steel Forged Flange ASTM A 694 Gr. F60 - ASME SA 694 Gr. F60
- Carbon Steel Forged Flange ASTM A 694 Gr. F65 - ASME SA 694 Gr. F65
- Carbon Steel Forged Flange ASTM A 694 Gr. F70 - ASME SA 694 Gr. F70
Carbon Steel Plate Flanges:
- Carbon Steel Plate Flange IS 2062 Gr. E250 BR
- Carbon Steel Plate Flange ASTM A 516 Gr. 60 - ASME SA 516 Gr. 60
- Carbon Steel Plate Flange ASTM A 516 Gr. 70 - ASME SA 516 Gr. 70
Low Temperature Carbon Steel Forged Flanges:
- Low Temperature Carbon Steel Forged Flange ASTM A 350 Gr. LF1 - ASME SA 350 Gr. LF1
- Low Temperature Carbon Steel Forged Flange ASTM A 350 Gr. LF2 Class 1 - ASME SA 350 Gr. LF2 Class 1
- Low Temperature Carbon Steel Forged Flange ASTM A 350 Gr. LF2 Class 2 - ASME SA 350 Gr. LF2 Class 2
- Low Temperature Carbon Steel Forged Flange ASTM A 350 Gr. LF3 Class 1 - ASME SA 350 Gr. LF3 Class 1
- Low Temperature Carbon Steel Forged Flange ASTM A 350 Gr. LF3 Class 2 - ASME SA 350 Gr. LF3 Class 2
- Low Temperature Carbon Steel Forged Flange ASTM A 350 Gr. LF5 Class 1 - ASME SA 350 Gr. LF5 Class 1
- Low Temperature Carbon Steel Forged Flange ASTM A 350 Gr. LF5 Class 2 - ASME SA 350 Gr. LF5 Class 2
- Low Temperature Carbon Steel Forged Flange ASTM A 350 Gr. LF6 Class 1 - ASME SA 350 Gr. LF6 Class 1
- Low Temperature Carbon Steel Forged Flange ASTM A 350 Gr. LF6 Class 2 - ASME SA 350 Gr. LF6 Class 2
- Low Temperature Carbon Steel Forged Flange ASTM A 350 Gr. LF6 Class 3 - ASME SA 350 Gr. LF6 Class 3
- Low Temperature Carbon Steel Forged Flange ASTM A 350 Gr. LF9 - ASME SA 350 Gr. LF9
Nickel Forged Flange:
- Nickel Alloy 200 Forged Flange ASTM B 564 UNS N02200 / Nickel 200 - ASME SB 564 UNS N02200 / Nickel 200
Nickel Plate Flange:
- Nickel Alloy 200 Plate Flange ASTM B 162 UNS N02200 / Nickel 200 - ASME SB 162 UNS N02200 / Nickel 200
- Nickel Alloy 201 Plate Flange ASTM B 162 UNS N02201 / Nickel 201 - ASME SB 162 UNS N02201 / Nickel 201
Monel Forged Flange:
- Monel 400 Forged Flange ASTM B 564 UNS N04400 / Monel 400 - ASME SB 564 UNS N04400 / Monel 400
Monel Plate Flange:
- Monel 400 Plate Flange ASTM B 127 UNS N04400 / Monel 400 - ASME SB 127 UNS N04400 / Monel 400
Hastelloy Forged Flange:
- Hastelloy C22 Forged Flange ASTM B 564 UNS N06022 / Hastelloy C22 - ASME SB 564 UNS N06022 / Hastelloy C22
- Hastelloy C276 Forged Flange ASTM B 564 UNS N10276 / Hastelloy C276 - ASME SB 564 UNS N10276 Hastelloy C276
Hastelloy Plate Flange:
- Hastelloy C22 Plate Flange ASTM B 575 UNS N06022 / Hastelloy C22 - ASME SB 575 UNS N06022 / Hastelloy C22
- Hastelloy C276 Plate Flange ASTM B 575 UNS N10276 / Hastelloy C276 - ASME SB 575 UNS N10276 Hastelloy C276
Inconel Forged Flange:
- Inconel 600 Forged Flange ASTM B 564 UNS N06600 / Inconel 600 - ASME SB 564 UNS N06600 / Inconel 600
- Inconel 625 Forged Flange ASTM B 564 UNS N06625 / Inconel 625 - ASME SB 564 UNS N06625 / Inconel 625
Inconel Plate Flange:
- Inconel 600 Plate Flange ASTM B 168 UNS N06600 / Inconel 600 - ASME SB 168 UNS N06600 / Inconel 600
- Inconel 625 Plate Flange ASTM B 168 UNS N06625 / Inconel 625 - ASME SB 168 UNS N06625 / Inconel 625
Incoloy Forged Flange:
- Incoloy 800 Forged Flange ASTM B 564 UNS N08800 / Incoloy 800 - ASME SB 564 UNS N08800 / Incoloy 800
- Incoloy 825 Forged Flange ASTM B 564 UNS N08825 / Incoloy 825 - ASME SB 564 UNS N08825 / Incoloy 825
Alloy 20 Forged Flange:
- Nickel Alloy 20 Forged Flange ASTM A 182 F20 / UNS N08020 / Alloy 20 / 20 CB 3 - ASME SA 182 F20 / UNS N08020 / Alloy 20 / 20 CB 3
Alloy 904L Forged Flange:
- Stainless Steel 904L Forged Flange ASTM A 182 Gr. F904L / UNS N08904 - ASME SA 182 Gr. F904L / UNS N08904
254 SMO Forged Flange:
- Stainless Steel 254 SMO Forged Flange ASTM A 182 Gr. F44 / UNS S31254 / 254 SMO / 6Mo - ASME SA 182 Gr. F44 / UNS S31254 / 254 SMO / 6Mo
Copper Nickel Forged Flange:
- Copper Nickel 90/10 Forged Flange ASTM B 151 UNS C70600 / Copper Nickel 90/10 - ASME SB 151 UNS C70600 / Copper Nickel 90/10
- Copper Nickel 70/30 Forged Flange ASTM B 151 UNS C71500 / Copper Nickel 70/30 - ASME SB 151 UNS C71500 / Copper Nickel 70/30
Titanium Forged Flange:
- Titanium Forged Flange ASTM B 381 Gr. F-1 / UNS R50250 / Titanium Gr. 1 - ASME SB 381 Gr. F-1 / UNS R50250 / Titanium Gr. 1
- Titanium Forged Flange ASTM B 381 Gr. F-2 / UNS R50400 / Titanium Gr. 2 - ASME SB 381 Gr. F-2 / UNS R50400 / Titanium Gr. 2
- Titanium Forged Flange ASTM B 381 Gr. F-5 / UNS R56400 / Titanium Gr. 5 - ASME SB 381 Gr. F-5 / UNS R56400 / Titanium Gr. 5
Size Range:
- From 8 DN / ¼” NPS to 1200 DN / 48” NPS
- Custom diameters available up to 3 meters based on special requirements.
Dimension Standards:
- Indian Standard: IS 1239 Part 2, IS 1538 & IS 6392
- American Standard: ASME B16.1, ASME B16.5, ASME B16.36 ASME B16.47 & ASME B16.48, AWWA C207, MSS SP-106 & MSS SP-44
- British Standard: BS 10, BS 3293 & BS 4504
- European Standard: EN 1092-1
- German Standard: DIN 2501, DIN 2502, DIN 2503, DIN 2512, DIN 2513, DIN 2514, DIN 2527, DIN 2543, DIN 2544, DIN 2545, DIN 2565, DIN 2566, DIN 2567, DIN 2568, DIN 2569, DIN 2573, DIN 2575, DIN 2576, DIN 2627, DIN 2628, DIN 2628, DIN 2629, DIN 2630, DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2636, DIN 2637, DIN 2638, DIN 2641, DIN 2642, DIN 2652, DIN 2653, DIN 2655, DIN 2656, DIN 2673, DIN 28815, DIN 86029 & DIN 86057
- Japanese Standard: JIS B 2220, JIS B 2216 & JIS B 2240
- Korean Standard: KS B1503
- ISO 7005-2
Class / Pressure Ratings:
- American Standard: 125#, 150#, 300#, 400#, 600#, 900#, 1500# & 2500#
- British, European & German Standard: PN 2.5, PN 6, PN 10, PN 16, PN 25, PN 40, PN 63, PN 100, PN 160, PN 250, PN 320 & PN 400
- Japanese Standard: 5K, 10K, 16K, 20K & 30K
Key Benefits
- Test Certificates: Products are supplied with certificates per EN 10204 3.1 / 3.2 / DIN 50049 3.1, ensuring transparency and quality.
- IBR Certification: Available per IBR form IIIC or IIIG.
- Galvanization: We offer Hot Dip Galvanized (per IS 2629 / IS 4736 / ASTM A 153) and Electro-Plated Galvanized finishes for enhanced corrosion resistance.
- Additional Testing: Available for Hydrogen-Induced Cracking (HIC), Sulphide Stress Cracking (SSC), Hydrogen Sulphide (H2S), NACE MR 0175 / MR 0103, ISO 15156 & IGC.
- NDT Test: Comprehensive testing options like Ultrasonic (UT), Dye Penetrant (DP), Liquid Penetrant (LP), Magnetic Particle Test (MPT), and coating thickness checks.
With Alliance Pipes & Fittings, you're choosing a partner who delivers quality, reliability, and innovation in every flange we produce. We adhere to the highest standards to ensure your projects meet their goals, backed by our commitment to customer satisfaction and global industry compliance.
Top Carbon Steel & Stainless Steel Flange Manufacturer in India EXPLORE OUR PRODUCTS
STAINLESS STEEL FORGED FLANGE
ASTM A / ASME SA 182 F304/F304L
ASTM A / ASME SA 182 F316/F316L
STAINLESS STEEL PLATE FLANGE
ASTM A / ASME SA 240 TP 304/TP 304L
ASTM A / ASME SA 240 TP 316/TP 316L
CARBON STEEL FORGED FLANGE
ASTM A / ASME SA 105
ASTM A / ASME SA 694 Gr. F42
ASTM A / ASME SA 694 Gr. F46
ASTM A / ASME SA 694 Gr. F48
ASTM A / ASME SA 694 Gr. F50
ASTM A / ASME SA 694 Gr. F52
ASTM A / ASME SA 694 Gr. F56
ASTM A / ASME SA 694 Gr. F60
ASTM A / ASME SA 694 Gr. F65
ASTM A / ASME SA 694 Gr. F70
CARBON STEEL PLATE FLANGE
ASTM A / ASME SA 516 GR. 60
ASTM A / ASME SA 516 GR. 70
IS 2062 E250 BR
DUPLEX STAINLESS STEEL FORGED FLANGE
ASTM A / ASME SA 182 Gr. F51 / UNS S31803
ASTM A / ASME SA 182 Gr. F60 / UNS S32205 (2205)
DUPLEX STAINLESS STEEL PLATE FLANGE
ASTM A / ASME SA 240 TP UNS S31803
ASTM A / ASME SA 240 TP UNS S32205
SUPER DUPLEX STAINLESS STEEL FORGED FLANGE
ASTM A / ASME SA 182 Gr. F53 / UNS S32750 (2507)
ASTM A / ASME SA 182 Gr. F55 / UNS S32760
SUPER DUPLEX STAINLESS STEEL PLATE FLANGE
ASTM A / ASME SA 240 TP UNS S32750 (2507)
ASTM A / ASME SA 240 TP UNS S32760
ALLOYS STEEL FORGED FLANGE
ASTM A / ASME SA 182 Gr. F5
ASTM A / ASME SA 182 Gr. F9
ASTM A / ASME SA 182 Gr. F11 Cl. 1
ASTM A / ASME SA 182 Gr. F11 Cl. 2
ASTM A / ASME SA 182 Gr. F11 Cl. 3
ASTM A / ASME SA 182 Gr. F22 Cl. 1
ASTM A / ASME SA 182 Gr. F22 Cl. 3
ASTM A / ASME SA 182 Gr. F91 Type 1
ASTM A / ASME SA 182 Gr. F91 Type 2
ASTM A / ASME SA 182 Gr. F92
NICKEL 200 FORGED FLANGE
ASTM B / ASME SB 564 UNS N02200
NICKEL 200 PLATE FLANGE
ASTM B / ASME SB 162 UNS N02200
NICKEL 201 PLATE FLANGE
ASTM B / ASME SB 162 UNS N02201
MONEL 400 FORGED FLANGE
ASTM B / ASME SB 564 UNS N04400
MONEL 400 PLATE FLANGE
ASTM B / ASME SB 127 UNS N04400
HASTELLOY C22 FORGED FLANGE
ASTM B / ASME SB 564 UNS N06022
HASTELLOY C22 PLATE FLANGE
ASTM B / ASME SB 575 UNS N06022
HASTELLOY C276 FORGED FLANGE
ASTM B / ASME SB 564 UNS N10276
HASTELLOY C276 PLATE FLANGE
ASTM B / ASME SB 575 UNS N10276
INCONEL 600 FORGED FLANGE
ASTM B / ASME SB 564 UNS N06600
INCONEL 600 PLATE FLANGE
ASTM B / ASME SB 168 UNS N06600
INCONEL 625 FORGED FLANGE
ASTM B / ASME SB 564 UNS N06625
INCONEL 625 PLATE FLANGE
ASTM B / ASME SB 168 UNS N06625
INCOLOY 800 FORGED FLANGE
ASTM B / ASME SB 564 UNS N08800
INCOLOY 800 PLATE FLANGE
ASTM B / ASME SB 409 UNS N08800
INCOLOY 800H PLATE FLANGE
ASTM B / ASME SB 409 UNS N08810
INCOLOY 800HT PLATE FLANGE
ASTM B / ASME SB 409 UNS N08811
INCOLOY 825 FORGED FLANGE
ASTM B / ASME SB 564 UNS N08825
INCOLOY 825 PLATE FLANGE
ASTM B / ASME SB 424 UNS N08825
ALLOY 20 FORGED FLANGE
ASTM B / ASME SB 182 F20 / UNS N08020
ALLOY 20 PLATE FLANGE
ASTM B / ASME SB 463 UNS N08020
ALLOY 904L FORGED FLANGE
ASTM A / ASME SA 182 F904L / UNS N08904
ALLOY 904L PLATE FLANGE
ASTM A / ASME SA 240 UNS N08904
ALLOY 254 SMO FORGED FLANGE
ASTM A / ASME SA 182 F44 / UNS S31254
ALLOY 254 SMO PLATE FLANGE
ASTM A / ASME SA 240 UNS S31254
COPPER NICKEL FORGED FLANGE
ASTM B / ASME SB 151 UNS C70600 / Copper Nickel 90/10
ASTM B / ASME SB 151 UNS C71500 / Copper Nickel 70/30
COPPER NICKEL PLATE FLANGE
ASTM B / ASME SB 171 UNS C70600 / Copper Nickel 90/10
ASTM B / ASME SB 171 UNS C71500 / Copper Nickel 70/30
TITANIUM FORGED FLANGE
ASTM B / ASME SB 381 Gr. F-1 / UNS R50250
ASTM B / ASME SB 381 Gr. F-2 / UNS R50400
ASTM B / ASME SB 381 Gr. F-5 / UNS R56400
TITANIUM PLATE FLANGE
ASTM B / ASME SB 265 Gr. 1 / UNS R50250
ASTM B / ASME SB 265 Gr. 2 / UNS R50400
ASTM B / ASME SB 265 Gr. 5 / UNS R56400
Carbon Steel Flanges & Stainless Steel Flanges | Trusted Flange Manufacturer in India
SLIPON FLANGE / Slip-On Welding Flange (SORF/SOW/SOFF)
Weld Neck Flange / Welding Neck Flange (WNRF/WNFF/WNRTJ)
Weld Neck Flange / Welding Neck Flange (WNRF/WNFF/WNRTJ)
Slipon Flange are used in low-pressure piping systems, cooling water lines, fuel lines, and process lines where quick assembly and alignment are required.
Size Range: ½" NB to 48" NB
Dimension Standards: ASME B16.5, ASME B16.47 Series A/B, DIN, EN 1092-1
Pressure Class: Class 150, 300, 600, 900, 1500
Weld Neck Flange / Welding Neck Flange (WNRF/WNFF/WNRTJ)
Weld Neck Flange / Welding Neck Flange (WNRF/WNFF/WNRTJ)
Weld Neck Flange / Welding Neck Flange (WNRF/WNFF/WNRTJ)
Weld Neck Flange are Ideal for high-pressure and high-temperature services in oil & gas, petrochemical, and power generation industries.
Size Range: ½" NB to 60" NB
Dimension Standards: ASME B16.5, ASME B16.47, MSS SP-44, DIN, EN 1092-1
Pressure Class: Class 150 to 2500
Blind Flange / Blind Flange (BLRF/BLFF/BLRTJ)
Weld Neck Flange / Welding Neck Flange (WNRF/WNFF/WNRTJ)
Blind Flange are used to close the ends of piping systems, valves, or pressure vessel openings — suitable for hydro testing and inspection.
Size Range: ½" NB to 60" NB
Dimension Standards: ASME B16.5, ASME B16.47, DIN, EN 1092-1
Pressure Class: Class 150 to 2500
Socket Weld Flange / Socket Welding Flange (SWRF/SWFF)
Socket Weld Flange are used in small-bore high-pressure piping systems in chemical, hydraulic, and steam applications.
Size Range: ½" NB to 4" NB
Dimension Standards: ASME B16.5, MSS SP-79, DIN, EN 1092-1
Pressure Class: Class 150, 300, 600, 900, 1500
Threaded Flange / NPT / BSP Threaded Flange (SCRF/SCFF)
Threaded Flange / NPT / BSP Threaded Flange (SCRF/SCFF)
Threaded Flange are suitable for low-pressure, non-welded systems such as air, water, or gas lines where welding is not preferred.
Size Range: ½" NB to 4" NB
Dimension Standards: ASME B16.5, BS 4504, DIN, EN 1092-1
Pressure Class: Class 150, 300, 600
Lap Joint Flange / Lapped Joint Flange (SOLJ/LJFF)
Threaded Flange / NPT / BSP Threaded Flange (SCRF/SCFF)
Lap Joint Flange commonly used in systems requiring frequent disassembly for cleaning or inspection, such as chemical or food processing plants.
Size Range: ½" NB to 24" NB
Dimension Standards: ASME B16.5, MSS SP-44, DIN, EN 1092-1
Pressure Class: Class 150 to 600
Plate Flange / Loose PLATE RING Flange / Backing Ring Flange (SOFF)
Plate Flange / Loose PLATE RING Flange / Backing Ring Flange (SOFF)
Plate Flange / Loose PLATE RING Flange / Backing Ring Flange (SOFF)
Loose Plate Flange used in low-pressure applications such as water pipelines, compressed air lines, and low-temperature services.
Size Range: ½" NB to 48" NB
Dimension Standards: ASME B16.5, EN 1092-1, BS 4504, DIN
Pressure Class: PN 6 to PN 40 / Class 150 to 300
Spectacle Blind Flange / Figure 8 Blank Flange (SBRF/SBFF)
Plate Flange / Loose PLATE RING Flange / Backing Ring Flange (SOFF)
Plate Flange / Loose PLATE RING Flange / Backing Ring Flange (SOFF)
Spectacle Blind Flange used in pipelines to isolate sections for maintenance or safety purposes, ideal for refineries and offshore platforms.
Size Range: ½" NB to 36" NB
Dimension Standards: ASME B16.48, ASME B16.5
Pressure Class: Class 150 to 900
Long Weld Neck Flange (LWNRF)
Plate Flange / Loose PLATE RING Flange / Backing Ring Flange (SOFF)
Long Weld Neck Flange (LWNRF)
Long Weld Neck Flange commonly used in high-pressure, high-temperature, and severe service applications, such as reactors and heat exchangers.
Size Range: ½" NB to 24" NB
Dimension Standards: ASME B16.5, ASME B16.47
Pressure Class: Class 150 to 2500
Orifice Flange
Paddle Spacer / Ring Spacer
Long Weld Neck Flange (LWNRF)
Orifice Flange designed for flow measurement and metering systems in oil, gas, and process industries.
Size Range: ½" NB to 24" NB
Dimension Standards: ASME B16.36, ASME B16.5
Pressure Class: Class 150 to 2500
Paddle Spacer / Ring Spacer
Paddle Spacer / Ring Spacer
Paddle Spacer / Ring Spacer
Paddle Spacer or Ring Spacer used as a temporary line opening or isolation device in pipeline systems for inspection, maintenance, or cleaning. Paddle Spacers (Ring Spacers) are installed between flanges to maintain the gap when the flow is open, acting as the “spacer” part of a spectacle blind set. Commonly used in oil & gas refineries, offshore platforms, petrochemical plants, and power stations.
Size Range: ½" NB to 36" NB
Dimension Standards: ASME B16.48, ASME B16.5, API 605, EN 1092-1
Pressure Class: Class 150, 300, 600, 900, 1500, 2500
Paddle Blank / Spade
Paddle Spacer / Ring Spacer
Paddle Spacer / Ring Spacer
Line Blinds or Paddle Blinds or Paddle Blanks (Spades) are used to block the flow in a pipeline for maintenance or testing purposes. They serve as the “blank” portion of a spectacle blind and are inserted between two flanges to completely shut off the flow. Ideal for refinery, chemical, gas processing, and power generation pipelines.
Size Range: ½" NB to 36" NB
Dimension Standards: ASME B16.48, ASME B16.5, API 605, DIN, EN 1092-1
Pressure Class: Class 150 to 2500
Types of Steel Forged & Plate Flanges
Flangeolet
Studding Outlet
Flangeolet
A Flangeolet (also known as a Flanged Outlet) combines a branch connection and flange in one fitting. It is welded directly onto the run pipe to create a flanged branch connection without requiring additional welding fittings. Used in high-pressure and high-temperature piping systems across petrochemical, oil & gas, and power plants.
Size Range: ½" NB to 24" NB (branch size)
Dimension Standards: MSS SP-97, ASME B16.5, ASME B16.9
Pressure Class: Class 150, 300, 600, 900, 1500, 2500
Nipoflange
Studding Outlet
Flangeolet
A Nipoflange is a combination of a Nipple and Flange, designed for connecting a branch pipeline to a main run pipe. It provides a compact and leak-proof branch connection for high-pressure oil, gas, and chemical applications, where space and strength are critical. Commonly used in refinery, shipbuilding, offshore, and process industries.
Size Range: ½" NB to 24" NB (branch size)
Dimension Standards: MSS SP-97, ASME B16.5, ASME B16.9
Pressure Class: Class 150 to 2500
Studding Outlet
Studding Outlet
Studding Outlet
Studding Outlets are designed for use on pressure vessels, tanks, and heat exchangers, providing a compact, bolted connection for nozzles or branch pipes. They eliminate the need for welding neck flanges and are ideal where space or weight reduction is needed. Widely used in petrochemical, power generation, and heavy equipment manufacturing.
Size Range: ½" NB to 24" NB
Dimension Standards: ASME B16.5, MSS SP-97, ASME Section VIII Div.1
Pressure Class: Class 150 to 2500
Reducing Flange
Reducing Flange
Studding Outlet
Reducing Flanges are used to connect two pipes of different diameters without requiring a separate reducer fitting. They provide a compact and cost-effective solution for pipeline size transitions in oil and gas refineries, petrochemical plants, power generation, water treatment, shipbuilding, and process industries. These flanges ensure a smooth flow transition between unequal pipe sizes, reducing turbulence and minimizing pressure loss.
Size Range: ½" NB to 48" NB
Dimension Standards: ASME B16.5, ASME B16.47 Series A & B, DIN, EN 1092-1, BS 4504
Pressure Class: Class 150, 300, 400, 600, 900, 1500, 2500
SAE Flange
Reducing Flange
forged ring
SAE Flanges (Society of Automotive Engineers Flanges) are designed for hydraulic and high-pressure fluid systems where strong, leak-proof connections are required. They are commonly used in hydraulic power units, offshore and marine applications, heavy machinery, earthmoving equipment, and oil & gas systems. SAE flanges provide easy assembly and disassembly of pipes, tubes, and hoses while maintaining high integrity under extreme pressure.
Size Range: ½" NB to 6" NB (DN 15 to DN 150)
Dimension Standards: SAE J518, ISO 6162, ISO 6164, DIN 20066
Pressure Class: Code 61 (up to 3000 PSI) & Code 62 (up to 6000 PSI)
forged ring
Reducing Flange
forged ring
SAE Flanges (Society of Automotive Engineers Flanges) are designed for hydraulic and high-pressure fluid systems where strong, leak-proof connections are required. They are commonly used in hydraulic power units, offshore and marine applications, heavy machinery, earthmoving equipment, and oil & gas systems. SAE flanges provide easy assembly and disassembly of pipes, tubes, and hoses while maintaining high integrity under extreme pressure.
Size Range: ½" NB to 6" NB (DN 15 to DN 150)
Dimension Standards: SAE J518, ISO 6162, ISO 6164, DIN 20066
Pressure Class: Code 61 (up to 3000 PSI) & Code 62 (up to 6000 PSI)
How to Do Visual & Dimensional Inspection of Flanges
QUALITY REQUIREMENTS FOR STEEL FLANGES
Flange inspection is an essential quality control requirement to ensure leak-proof performance and compliance with ASME, ASTM, DIN, EN, and API standards. Inspections are carried out before welding, during machining, and before final dispatch to ensure product reliability in piping systems, storage tanks, fittings, and spools.
Visual Inspection of STEEL Flanges
Purpose: To detect external or surface defects that may reduce flange strength or sealing capability.
Steps:
- Check the overall surface condition: no rust, porosity, pitting, or contamination.
- Inspect the flange facing: no dents, scratches, or tool marks on RF, FF, or RTJ faces.
- Verify bolt holes: clean edges, no burrs, correct alignment.
- Inspect for cracks or laminations, especially around the hub and transition areas. Perform penetrant testing if necessary.
- Confirm markings and traceability: size, pressure class, grade, heat number, standard, and manufacturer identification.
- Examine weld neck area on welding neck flanges: no undercut, grinding marks, or deformities.
- Ensure the flange face is flat with no deformation or warpage.
Visual acceptance criteria should conform to ASME B16.5 and ASME B16.47.
Dimensional Inspection of F STEEL FLANGES
Purpose: To verify adherence to dimensional tolerances and machining accuracy as per standards.
Dimensional measuring instruments recommended:
- Vernier caliper or digital caliper
- Height gauge
- Feeler gauge and straight edge
- Bevel protractor
- Radius gauge
- Pi or measuring tape
Key dimensions to check:
- Outer diameter of flange
- Inner diameter or bore to match pipe connections
- Flange thickness as per pressure design
- Raised Face OD & height (1.6 mm for Class 150-300 / 6.4 mm for Class 400-2500)
- Neck dimensions for weld neck flange
- Hub dimensions for slipon, socketweld, threaded & lap joint flange
- Total height of flange
- Bolt Circle Diameter (BCD) and number of bolt holes
- Bolt hole diameter and spacing
- Flatness or runout to avoid leakage during gasket compression
- Chamfer or spot facing where required
Standards used for reference:
ASME B16.5 / ASME B16.47 / MSS SP-44 / AWWA C207 / DIN EN 1092-1
Gasket Contact Surface and Roughness Verification OF STEEL FLANGES
Facing type and required roughness:
- Raised Face (RF): 3.2–6.3 microns (better sealing)
- Flat Face (FF): 1.6–3.2 microns (soft gasket compatibility)
- Ring Type Joint (RTJ): less than 1.6 microns (metallic sealing)
Ensure concentric or spiral serrations are uniform and within the required finish range.
Alignment and Fit-Up Check OF STEEL FLANGES
To ensure proper connection during installation:
- Gasket seating should be uniform and free from misalignment.
- Bolts should pass smoothly across opposite holes.
- Hub centricity must be accurate for weld neck flanges.
- The pipe must fit into the bore without interference or step mismatch.
Documentation and Quality Compliance OF STEEL FLANGES
After inspection, maintain:
- Visual inspection report
- Dimensional inspection report
- Heat number traceability record
- Surface finish and NDT reports (if applicable)
- Material Test Certificates (EN 10204 3.1 or 3.2)
Inspection confirms for Steel Flanges
- Leak-free and reliable flange connections
- Correct alignment and bolt load distribution
- Long-term performance in pressure and temperature variations
- Adherence to international manufacturing standards
Alliance Pipes & Fittings | Steel Pipes & Plates Supplier
About Alliance Pipes & Fittings
Your Trusted Partner for Industrial Pipes, Plates, Flanges & Fittings
Alliance Pipes & Fittings (APF) is an established manufacturer, stockholder, supplier and exporter of industrial pipes, tubes, plates, flanges and pipe fittings in India. Established in 2002, we serve customers across India and international markets with a focus on quality, reliable supply and responsive service.
We are ISO 9001 certified since 2006 and operate from Mumbai and Navi Mumbai, Maharashtra, India. Our combination of manufacturing capability, stockholding and sourcing expertise enables us to support standard, specialty and project-specific material requirements.
Industrial & Project Supply
Our products are supplied for Oil & Gas, Refineries, Petrochemical, Fertilizer, Chemical, Power, Pressure Vessel, EPC, Engineering, Fabrication, Marine, Water Treatment, Desalination and Infrastructure projects.
We support customers with material sourcing, stock availability, MTC documentation, heat-number traceability, inspection requirements and export packing, according to product and project specifications.
India & International Supply
From our strategic location in Mumbai and Navi Mumbai, we serve customers throughout India and support export requirements for markets including the UAE, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain, Singapore, Malaysia, UK, USA, South Africa and Australia.
Why Alliance Pipes & Fittings?
- Established in 2002
- ISO 9001 certified since 2006
- Manufacturer of APF Brand products
- Extensive industrial material sourcing & stockholding
- Wide range of steel and specialty alloys
- Mumbai & Navi Mumbai operations
- Project, bulk and export supply capability
- Quality documentation and traceability support
- Customer-focused service
Quality. Reliability. Supply.
At Alliance Pipes & Fittings, our goal is to build long-term customer relationships by providing the right material, reliable sourcing, competitive supply and professional service.
Alliance Pipes & Fittings – Manufacturer, Stockholder, Supplier & Exporter of Industrial Pipes, Plates, Flanges & Fittings in India.
Phone: +91 91 5200 5400
Email: info@alliancefittings.net
Learn about Alliance Pipes & Fittings, an ISO 9001 certified steel pipes, plates, flanges & fittings manufacturer, stockholder, supplier and exporter in India.
Alliance Pipes & Fittings (APF) is an established manufacturer, stockholder, supplier and exporter of industrial steel pipes, tubes, plates, sheets, bars, flanges and pipe fittings in India. Established in 2002, we have developed a strong presence in the industrial piping and engineering materials sector by supplying quality products for domestic and international requirements.
We are an ISO 9001 certified company since 2006, committed to quality, reliable sourcing, material traceability and responsive customer service.
With manufacturing and stockholding operations in Mumbai and Navi Mumbai, Maharashtra, India, Alliance Pipes & Fittings supplies products for oil & gas, refineries, petrochemical plants, fertilizer plants, power plants, chemical industries, pressure vessels, EPC projects, fabrication companies, shipbuilding, infrastructure and other industrial applications.
Our business combines manufacturing capability with extensive stockholding, enabling us to support both regular requirements and project-based orders.
Manufacturer, Stockholder, Supplier & Exporter
Alliance Pipes & Fittings operates through two complementary business divisions:
APF Manufacturing Division
We manufacture APF Brand industrial forged and machined products, including:
- Forged Flanges
- Plate Flanges
- Forged Socket Weld Fittings
- Forged Threaded Pipe Fittings
- Welding Outlets
- Taper Plugs
- Butt Weld Pipe Fittings
- Special Forged & Machined Components
Our manufacturing capabilities enable us to supply products according to applicable international standards, customer specifications and project requirements.
Stockholding & Supply Division
We maintain and source a wide range of industrial metal products, including:
- Stainless Steel Pipes & Tubes
- Carbon Steel Pipes & Tubes
- Alloy Steel Pipes & Tubes
- Stainless Steel Plates & Sheets
- Carbon Steel Plates
- Alloy Steel Plates
- Duplex & Super Duplex Steel Products
- Nickel Alloy Products
- Round Bars & Flat Bars
- Speciality Engineering Materials
We support customers requiring ready stock, bulk quantities, project supplies and customized material sourcing.
Our Product Range
Alliance Pipes & Fittings supplies industrial piping and engineering materials in a wide range of grades, sizes and specifications.
Steel Pipes & Tubes
We supply:
- Stainless Steel Seamless Pipes
- Stainless Steel Welded Pipes
- Carbon Steel Seamless Pipes
- Carbon Steel EFW & LSAW Pipes
- Alloy Steel Seamless Pipes
- Duplex Steel Pipes
- Super Duplex Steel Pipes
- Nickel Alloy Pipes & Tubes
- Instrumentation & Precision Tubes
Products can be supplied according to applicable ASTM, ASME, API, EN and other recognized standards, subject to product and project requirements.
Steel Plates & Sheets
Our plate range includes:
- Carbon Steel Plates
- Pressure Vessel Steel Plates
- HIC Resistant Steel Plates
- Alloy Steel Plates
- Stainless Steel Plates
- Duplex Steel Plates
- Super Duplex Steel Plates
- Nickel Alloy Plates
- Special Alloy Plates
- Boiler & Pressure Vessel Plates
We supply materials for fabrication, pressure vessels, storage tanks, process equipment, structural applications and industrial projects.
Flanges & Pipe Fittings
Our manufactured and supplied range includes:
- Forged Flanges
- Plate Flanges
- Weld Neck Flanges
- Slip-On Flanges
- Blind Flanges
- Socket Weld Flanges
- Threaded Flanges
- Lap Joint Flanges
- Forged Socket Weld Fittings
- Threaded Fittings
- Butt Weld Pipe Fittings
- Welding Outlets
- Special Forged Components
Detailed flange standards, dimensions, pressure classes and material specifications are available on our dedicated product pages.
Materials We Supply
Alliance Pipes & Fittings supplies products in a broad range of ferrous and non-ferrous materials, including:
Stainless Steel | Carbon Steel | Alloy Steel | Duplex Steel | Super Duplex Steel | Low Temperature Carbon Steel | Mild Steel | Nickel Alloys | Inconel | Incoloy | Monel | Hastelloy | Alloy 20 | 904L | 254 SMO | Titanium | Copper Nickel | Copper | Brass | Aluminium | CPVC | UPVC | PVC | PP
Material availability depends on product type, grade, size and project requirements.
Manufacturing & Stockholding Facilities in Mumbai & Navi Mumbai
Our operations in Mumbai and Navi Mumbai, Maharashtra enable us to efficiently serve customers across India and support export requirements.
Our facilities and supply network support:
- Ready stock requirements
- Bulk material requirements
- Project supplies
- Domestic deliveries
- Export orders
- Custom manufacturing
- Material sourcing
- Third-party inspection
- Export packaging
- Material traceability
Being strategically located in the Mumbai–Navi Mumbai industrial region provides us with access to major industrial, EPC, fabrication, port and logistics networks.
Quality Assurance & Material Documentation
Quality and material traceability are important parts of our supply process.
Depending on product and project requirements, we can support documentation and inspection requirements such as:
- Mill Test Certificates (MTC)
- EN 10204 3.1 / 3.2 documentation
- Heat Number Traceability
- Dimensional Inspection
- Material Identification
- Third-Party Inspection
- IBR documentation where applicable
- NACE requirements where applicable
- Customer-specific inspection requirements
- Project quality documentation
All certifications, inspection documents and compliance requirements are subject to the applicable product, purchase order and project specification.
Industries We Serve
Our steel pipes, plates, flanges, fittings and engineering materials are used across a wide range of industries and applications, including:
- Oil & Gas
- Petroleum Refineries
- Petrochemical Plants
- Fertilizer Plants
- Chemical Processing
- Power Generation
- Boiler & Pressure Vessel
- EPC Projects
- Engineering & Fabrication
- Shipbuilding & Marine
- Water Treatment
- Desalination Plants
- Storage Terminals & Tank Farms
- Industrial Construction
- Infrastructure Projects
- Process Plants
- Maintenance & Shutdown Projects
We work with manufacturers, fabricators, EPC contractors, engineering companies, traders, procurement companies and industrial end users.
Domestic & Export Supply from India
Alliance Pipes & Fittings supplies industrial steel products to customers across India and international markets.
Our export supply capabilities support requirements for markets including the UAE, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain, Malaysia, Singapore, the United Kingdom, the United States, South Africa, Australia and other international destinations, subject to project and customer requirements.
We can support export orders with:
- Export-worthy packing
- Material certificates
- Heat number traceability
- Inspection documentation
- Customized packing requirements
- Shipping documentation
- Project-specific quality documentation
Our location in Mumbai and Navi Mumbai provides convenient access to major logistics and export infrastructure.
Project & Bulk Material Supply
We understand that industrial projects often require multiple products, materials, grades and sizes from a single supplier.
Alliance Pipes & Fittings supports project procurement requirements for:
Pipes + Tubes + Plates + Sheets + Bars + Flanges + Fittings
Our team can assist with material identification, sourcing, stock availability, technical specifications, documentation and dispatch coordination.
Whether the requirement is for a single material grade or a larger project package, we aim to provide a reliable and responsive supply solution.
Why Choose Alliance Pipes & Fittings?
Customers choose Alliance Pipes & Fittings for:
- Established since 2002
- ISO 9001 certified since 2006
- Manufacturer of APF Brand forged and machined products
- Industrial steel pipe and plate stockholding
- Wide range of ferrous and non-ferrous materials
- Manufacturing and stockholding operations in Mumbai & Navi Mumbai
- Domestic and international supply capability
- Project and bulk quantity support
- Material traceability
- Mill Test Certificate support
- Third-party inspection support
- Export packing and documentation
- Responsive quotation and procurement support
Our objective is to combine quality products, dependable sourcing, competitive supply and timely service to meet the requirements of industrial customers.
Our Commitment
At Alliance Pipes & Fittings, our commitment is to build long-term relationships with customers through consistent product quality, transparent communication and dependable service.
We continuously work to improve our sourcing, manufacturing, quality-control and supply processes so that customers can procure industrial piping and steel materials with greater confidence.
From pipes and tubes to plates, bars, flanges and fittings, we aim to be a reliable single-source supplier for industrial and project requirements.
Contact Alliance Pipes & Fittings
Looking for a steel pipe supplier, steel plate stockholder, flange manufacturer, pipe fittings supplier or industrial material exporter in India?
Contact Alliance Pipes & Fittings for your product, stock and project requirements.
Alliance Pipes & Fittings
Mumbai & Navi Mumbai, Maharashtra, India
Phone: +91 91 5200 5400
Email: info@alliancefittings.net
Website: www.alliancefittings.net
Request a Quote
Send us your required material, grade, size, quantity and applicable specification/standard and our team will assist you with availability, pricing and technical documentation.
✅ Quality & Certifications
Quality is the foundation of Alliance Pipes & Fittings. We follow strict quality control processes at every stage of sourcing, stocking, and dispatch to ensure our customers receive only certified and reliable products.
We supply materials with:
- Mill Test Certificates (MTC)
- IBR Certification (where applicable)
- NACE Compliance (MR0175 / MR0103)
- Third-Party Inspection Support
- Full Heat Number Traceability
Our ISO 9001 certified systems ensure consistent quality, timely delivery, and complete customer satisfaction.
✅ Industries We Serve
Alliance Pipes & Fittings supplies piping materials for critical industrial applications worldwide, including:
- Oil & Gas Pipelines
- Refineries & Petrochemical Plants
- Power Generation & Boilers
- Pressure Vessels & Heat Exchangers
- Shipbuilding & Marine Repair
- EPC & Industrial Fabrication Projects
Our products are designed for high-pressure, high-temperature, and corrosive service environments.
✅ Manufacturing & Warehousing Strength
With strong warehousing and distribution facilities in Mumbai and nearby industrial hubs, we maintain a large ready inventory of Pipes, Tubes, and Plates for urgent and bulk project requirements.
Our advanced stock management ensures:
- Fast order processing
- Immediate dispatch
- Export-ready packaging
- On-time delivery across India and global markets
✅ Why Choose Alliance Pipes & Fittings
Customers choose Alliance Pipes & Fittings because of our commitment to quality, reliability, and long-term partnerships.
Key advantages include:
- One-stop solution for Pipes, Tubes & Plates
- Wide range of Stainless Steel, Carbon Steel, Alloy Steel & Nickel Alloys
- Competitive pricing with bulk stock availability
- Complete certification and inspection support
- Trusted supplier for domestic and export projects
We aim to deliver value-driven solutions that meet international standards.
✅ Contact Us (Call to Action)
Looking for a reliable supplier of Steel Pipes, Tubes, and Plates in Mumbai, India?
📩 Contact Alliance Pipes & Fittings today for quotations, technical support, and fast delivery for your industrial or export requirements.
FORGED & PLATE MACHINED FLANGES
At Alliance Pipes & Fittings, we specialize in the manufacturing of a wide variety of flanges that meet global industry standards. Our extensive product line includes:
Types of Forged & Plate Flanges Manufactured
- Slip-On Welding Flange (SORF/SOW/SOFF)
- Lapped Joint Flange (SOLJ/LJFF)
- Socket Welding Flange (SWRF/SWFF)
- Welding Neck Flange (WNRF/WNFF/WNRTJ)
- Blind Flange (BLRF/BLFF/BLRTJ)
- NPT / BSP Threaded Flange (SCRF/SCFF)
- Spectacle Blind Flange / Figure 8 Blank Flange (SBRF/SBFF)
- Orifice Flange
- Long Weld Neck Flange (LWNRF)
- Loose Flange / Backing Ring Flange (SOFF)
- Paddle Spacer / Ring Spacer
- Paddle Blank / Spades
- Orifice Plate
- Flangeolet
- Nipoflange
- Studding Outlet
Each flange type is designed to ensure precision, durability, and compatibility with the diverse needs of various industries including petrochemical, oil & gas, and more.
Dimension Standards
Our flanges are manufactured according to various international standards, ensuring compatibility and compliance. Some of the key standards include:
- ASME B16.1, ASME B16.5, ASME B16.36, ASME B16.47, ASME B16.48
- AWWA C207
- BS 10, BS 3293, BS 4504, BS EN 1092-1
- DIN 2501, DIN 2502, DIN 2503, DIN 2512, DIN 2513, DIN 2514, DIN 2527, DIN 2543, DIN 2544, DIN 2545, DIN 2565, DIN 2566, DIN 2567, DIN 2568, DIN 2569, DIN 2573, DIN 2575, DIN 2576, DIN 2627, DIN 2628, DIN 2628, DIN 2629, DIN 2630, DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2636, DIN 2637, DIN 2638, DIN 2641, DIN 2642, DIN 2652, DIN 2653, DIN 2655, DIN 2656, DIN 2673, DIN 28815, DIN 86029, DIN 86057
- JIS B 2220, JIS B 2216, JIS B 2240
- KS B1503
- MSS SP-106, MSS SP-44
- ISO 7005-2
- IS 1239 PART 2, IS 1538, IS 6392
With adherence to these standards, we ensure our products are globally accepted and reliable.
Size Range
We offer a broad range of flange sizes to suit different piping needs:
- From 8 DN / ¼” NPS to 1200 DN / 48” NPS
- Custom diameters available up to 3 meters based on special requirements.
Class Ratings
Our flanges come with a variety of pressure class ratings:
- 125#, 150#, 300#, 400#, 600#, 900#, 1500#, 2500#
- PN 2.5, PN 6, PN 10, PN 16, PN 25, PN 40, PN 63, PN 100, PN 160, PN 250, PN 320, PN 400
- 5K, 10K, 16K, 20K, 30K
These class ratings ensure that our flanges meet specific pressure and temperature requirements for various applications.
Material Specifications
We manufacture flanges using a wide variety of materials to meet the demands of different environments and industries:
Stainless Steel Forged Flange:
- ASTM A 182 Gr. F304 / UNS S30400 - ASME SA 182 Gr. F304 / UNS S30400
- ASTM A 182 Gr. F304L / UNS S30403 - ASME SA 182 Gr. F304L / UNS S30403
- ASTM A 182 Gr. F304H / UNS S30409 - ASME SA 182 Gr. F304H / UNS S30409
- ASTM A 182 Gr. F310 / UNS S31000 - ASME SA 182 Gr. F310 / UNS S31000
- ASTM A 182 Gr. F310H / UNS S31009 - ASME SA 182 Gr. F310H / UNS S31009
- ASTM A 182 Gr. F316 / UNS S31600 - ASME SA 182 Gr. F316 / UNS S31600
- ASTM A 182 Gr. F316L / UNS S31603 - ASME SA 182 Gr. F316L / UNS S31609
- ASTM A 182 Gr. F316H / UNS S31609 - ASME SA 182 Gr. F316H / UNS S31609
- ASTM A 182 Gr. F316Ti / UNS S31635 - ASME SA 182 Gr. F316Ti / UNS S31635
- ASTM A 182 Gr. F317L / UNS S31703 - ASME SA 182 Gr. F317L / UNS S31703
- ASTM A 182 Gr. F321H / UNS S32109 - ASME SA 182 Gr. F321H / UNS S32109
- ASTM A 182 Gr. F347H / UNS S34709 - ASME SA 182 Gr. F347H / UNS S34709
- ASTM A 182 Gr. F904L / UNS N08904 - ASME SA 182 Gr. F904L / UNS N08904
- ASTM A 182 Gr. F20 / UNS N08020 / Alloy 20 - ASME SA 182 Gr. F20 / UNS N08020 / Alloy 20
- ASTM A 182 Gr. F44 / UNS S31254 / 254 SMO / 6Mo / ASME SA 182 Gr. F44 / UNS S31254 / 254 SMO / 6Mo
Stainless Steel Plate Flange: - ASTM A 240 TP 304 / UNS S30400 - ASME SA 240 TP 304 / UNS S30400
- ASTM A 240 TP 304L / UNS S30403 - ASME SA 240 TP 304L / UNS S30403
- ASTM A 240 TP 304H / UNS S30409 - ASME SA 240 TP 304H / UNS S30409
- ASTM A 240 TP 310S / UNS S31008 - ASME SA 182 Gr. 310S / UNS S31008
- ASTM A 240 TP 316 / UNS S31600 - ASME SA 240 TP 316 / UNS S31600
- ASTM A 240 TP 316L / UNS S31603 - ASME SA 240 TP 316L / UNS S31603
- ASTM A 240 TP 316H / UNS S31609 - ASME SA 240 TP 316H / UNS S31609
- ASTM A 240 TP 316Ti / UNS S31635 - ASME SA 240 TP 316Ti / UNS S31635
- ASTM A 240 TP 317L / UNS S31703 - ASME SA 240 TP 317L / UNS S31703
- ASTM A 240 TP 321H / UNS S32109 - ASME SA 240 TP 321H / UNS S32109
- ASTM A 240 TP 347H / UNS S34709 - ASME SA 240 TP 347H / UNS S34709
- ASTM A 240 TP UNS S31254 / 254 SMO / 6Mo - ASME SA 240 TP UNS S31254 / 254 SMO / 6Mo
- ASTM A 240 TP UNS N08904 / 904L - ASME SA 240 TP UNS N08904 / 904L
- ASTM A 240 TP UNS N08020 / Alloy 20 - ASME SA 240 TP UNS N08020 / Alloy 20
- ASTM A 240 TP UNS N08800 / Incoloy 800 - ASME SA 240 TP UNS N08800 / Incoloy 800
- ASTM A 240 TP UNS N08810 / Incoloy 800H - ASME SA 240 TP UNS N08810 / Incoloy 800H
- ASTM A 240 TP UNS N08811 / Incoloy 800HT - ASME SA 240 TP UNS N08811 / Incoloy 800HT
Duplex Stainless Steel Forged Flange:
- ASTM A 182 Gr. F51 / UNS S31803 - ASME SA 182 Gr. F51 / UNS S31803
- ASTM A 182 Gr. F60 / UNS S32205 - ASTM A 182 Gr. F60 / UNS S32205
Duplex Stainless Steel Plate Flange:
- ASTM A 240 TP UNS S31803 - ASME SA 240 TP UNS S31803
- ASTM A 240 TP 2205 / UNS S32205 - ASME SA 240 TP 2205 / UNS S32205
Super Duplex Stainless Steel Forged Flange:
- ASTM A 182 Gr. F53 / UNS S32750 - ASME SA 182 Gr. F53 / UNS S32750
- ASTM A 182 Gr. F55 / UNS S32760 - ASME SA 182 Gr. F55 / UNS S32760
Super Duplex Stainless Steel Plate Flange:
- ASTM A 240 TP UNS S32750 - ASME SA 240 TP UNS S32750
- ASTM A 240 TP UNS S32760 - ASME SA 240 TP UNS S32760
Alloy Steel Forged Flange:
- ASTM A 182 Gr. F5 / UNS K41545 - ASME SA 182 Gr. F5 / UNS K41545
- ASTM A 182 Gr. F9 / UNS K90941 - ASME SA 182 Gr. F9 / UNS K90941
- ASTM A 182 Gr. F11 Class 1 / UNS K11597 - ASME SA 182 Gr. F11 Class 1 / UNS K11597
- ASTM A 182 Gr. F11 Class 2 / UNS K11572 - ASME SA 182 Gr. F11 Class 2 / UNS K11572
- ASTM A 182 Gr. F11 Class 3 / UNS K11572 - ASME SA 182 Gr. F11 Class 3 / UNS K11572
- ASTM A 182 Gr. F22 Class 1 / UNS K21590 - ASME SA 182 Gr. F22 Class 1 / UNS K21590
- ASTM A 182 Gr. F22 Class 3 / UNS K21590 - ASME SA 182 Gr. F22 Class 3 / UNS K21590
- ASTM A 182 Gr. F91 Type 1 / UNS K90901 - ASME SA 182 Gr. F91 Type 1 / UNS K90901
- ASTM A 182 Gr. F91 Type 2 / UNS K90901 - ASME SA 182 Gr. F91 Type 2 / UNS K90901
- ASTM A 182 Gr. F92 / UNS K92460 - ASME SA 182 Gr. F92 / UNS K92460
Low Alloy Steel Forged Flange:
- ASTM A 694 Gr. F42 - ASME SA 694 Gr. F42
- ASTM A 694 Gr. F46 - ASME SA 694 Gr. F46
- ASTM A 694 Gr. F48 - ASME SA 694 Gr. F48
- ASTM A 694 Gr. F50 - ASME SA 694 Gr. F50
- ASTM A 694 Gr. F52 - ASME SA 694 Gr. F52
- ASTM A 694 Gr. F56 - ASME SA 694 Gr. F56
- ASTM A 694 Gr. F60 - ASME SA 694 Gr. F60
- ASTM A 694 Gr. F65 - ASME SA 694 Gr. F65
- ASTM A 694 Gr. F70 - ASME SA 694 Gr. F70
Carbon Steel Forged Flange:
- ASTM A 105 - ASME SA 105
In addition to being a leading stainless steel flange manufacturer, we also specialize in carbon steel flanges, known for their strength and durability in heavy-duty applications.
Carbon Steel Plate Flange:
- IS 2062 Gr. E 250 A
- ASTM A 516 Gr. 60 - ASME SA 516 Gr. 60
- ASTM A 516 Gr. 70 - ASME SA 516 Gr. 70
- ASTM A 515 Gr. 60 - ASME SA 515 Gr. 60
- ASTM A 515 Gr. 70 - ASME SA 515 Gr. 70
Low Temperature Carbon Steel Forged Flange:
- ASTM A 350 Gr. LF1 - ASME SA 350 Gr. LF1
- ASTM A 350 Gr. LF2 Class 1 - ASME SA 350 Gr. LF2 Class 1
- ASTM A 350 Gr. LF2 Class 2 - ASME SA 350 Gr. LF2 Class 2
- ASTM A 350 Gr. LF3 Class 1 - ASME SA 350 Gr. LF3 Class 1
- ASTM A 350 Gr. LF3 Class 2 - ASME SA 350 Gr. LF3 Class 2
- ASTM A 350 Gr. LF5 Class 1 - ASME SA 350 Gr. LF5 Class 1
- ASTM A 350 Gr. LF5 Class 2 - ASME SA 350 Gr. LF5 Class 2
- ASTM A 350 Gr. LF6 Class 1 - ASME SA 350 Gr. LF6 Class 1
- ASTM A 350 Gr. LF6 Class 2 - ASME SA 350 Gr. LF6 Class 2
- ASTM A 350 Gr. LF6 Class 3 - ASME SA 350 Gr. LF6 Class 3
- ASTM A 350 Gr. LF9 - ASME SA 350 Gr. LF9
Nickel Forged Flange:
- ASTM B 564 UNS N02200 / Nickel 200 - ASME SB 564 UNS N02200 / Nickel 200
Monel Forged Flange:
- ASTM B 564 UNS N04400 / Monel 400 - ASME SB 564 UNS N04400 / Monel 400
Hastelloy Forged Flange:
- ASTM B 564 UNS N06022 / Hastelloy C22 - ASME SB 564 UNS N06022 / Hastelloy C22
- ASTM B 564 UNS N10276 / Hastelloy C276 - ASME SB 564 UNS N10276 Hastelloy C276
Inconel Forged Flange:
- ASTM B 564 UNS N06600 / Inconel 600 - ASME SB 564 UNS N06600 / Inconel 600
- ASTM B 564 UNS N06625 / Inconel 625 - ASME SB 564 UNS N06625 / Inconel 625
Incoloy Forged Flange:
- ASTM B 564 UNS N08800 / Incoloy 800 - ASME SB 564 UNS N08800 / Incoloy 800
- ASTM B 564 UNS N08825 / Incoloy 825 - ASME SB 564 UNS N08825 / Incoloy 825
Alloy 20 Forged Flange:
- ASTM B 462 F20 / UNS N08020 / Alloy 20 / 20 CB 3 - ASME SB 462 F20 / UNS N08020 / Alloy 20 / 20 CB 3
Nickel Alloy 904L Forged Flange:
- ASTM A 182 Gr. F904L / UNS N08904 - ASME SA 182 Gr. F904L / UNS N08904.
254 SMO Forged Flange:
- ASTM A 240 TP UNS S31254 / 254 SMO / 6Mo - ASME SA 240 TP UNS S31254 / 254 SMO / 6Mo
Copper Nickel Forged Flange:
- ASTM B 151 UNS C70600 / Copper Nickel 90/10 - ASME SB 151 UNS C70600 / Copper Nickel 90/10
- ASTM B 151 UNS C71500 / Copper Nickel 70/30 - ASME SB 151 UNS C71500 / Copper Nickel 70/30
Titanium Forged Flange:
- ASTM B 381 Gr. F-1 / UNS R50250 / Titanium Gr. 1 - ASME SB 381 Gr. F-1 / UNS R50250 / Titanium Gr. 1
- ASTM B 381 Gr. F-2 / UNS R50400 / Titanium Gr. 2 - ASME SB 381 Gr. F-2 / UNS R50400 / Titanium Gr. 2
- ASTM B 381 Gr. F-3 / UNS R50550 / Titanium Gr. 3 - ASME SB 381 Gr. F-3 / UNS R50550 / Titanium Gr. 3
- ASTM B 381 Gr. F-4 / UNS R50700 / Titanium Gr. 4 - ASME SB 381 Gr. F-4 / UNS R50700 / Titanium Gr. 4
- ASTM B 381 Gr. F-5 / UNS R56400 / Titanium Gr. 5 - ASME SB 381 Gr. F-5 / UNS R56400 / Titanium Gr. 5
- ASTM B 381 Gr. F-6 / UNS R54520 / Titanium Gr. 6 - ASME SB 381 Gr. F-6 / UNS R54520 / Titanium Gr. 6
- ASTM B 381 Gr. F-7 / UNS R52400 / Titanium Gr. 7 - ASME SB 381 Gr. F-7 / UNS R52400 / Titanium Gr. 7
- ASTM B 381 Gr. F-9 / UNS R56320 / Titanium Gr. 9 - ASME SB 381 Gr. F-9 / UNS R56320 / Titanium Gr. 9
- ASTM B 381 Gr. F-11 / R52250 / Titanium Gr. 11 - ASME SB 381 Gr. F-11 / R52250 / Titanium Gr. 11
We ensure high-quality material for all our products to withstand extreme environmental and operational conditions.
Key Benefits
- Test Certificates: Products are supplied with certificates per EN 10204 3.1 / 3.2 / DIN 50049 3.1, ensuring transparency and quality.
- IBR Certification: Available per IBR form IIIC or IIIG.
- Galvanization: We offer Hot Dip Galvanized (per IS 2629 / IS 4736 / ASTM A 153) and Electro-Plated Galvanized finishes for enhanced corrosion resistance.
- Additional Testing: Available for Hydrogen-Induced Cracking (HIC), Sulphide Stress Cracking (SSC), Hydrogen Sulphide (H2S), NACE MR 0175 / MR 0103, ISO 15156.
- PED Approved Mills: Sourcing only from certified manufacturers.
- Tensile Testing & NDT: Comprehensive testing options like Ultrasonic (UT), Dye Penetrant (DPT), Liquid Penetrant (LPT), Magnetic Particle (MPT), and coating thickness checks.
With Alliance Pipes & Fittings, you're choosing a partner who delivers quality, reliability, and innovation in every flange, fitting, and connection we produce. We adhere to the highest standards to ensure your projects meet their goals, backed by our commitment to customer satisfaction and global industry compliance.
As a renowned stainless steel flange manufacturer, we produce durable, corrosion-resistant flanges suitable for high-pressure and high-temperature applications.
In addition to being a leading stainless steel flange manufacturer, we are also top carbon steel flange manufacturer, known for their strength and durability in heavy-duty applications. We proudly supply to Pune and export to Dubai, delivering reliable products and timely service.
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steel pipe fittings manufacturer
steel flanges manufacturer
FORGED & BAR STOCK MACHINED SOCKET WELD & NPT / BSP THREADED PIPE FITTINGS
Alliance Pipes & Fittings: Trusted Steel SW Fittings Manufacturer in Mumbai, we specialize in manufacturing high-quality forged socket weld and threaded fittings, designed to meet the demanding requirements of various industries, including oil & gas, chemical processing, and power generation.
We proudly supply our steel SW fittings to businesses in Pune and export to Dubai, delivering exceptional service and timely delivery.
Types of Forged & Bar Stock Machined Socket Weld & NPT / BSP Threaded Pipe Fittings
- Equal / Reducing Elbows
- Equal / Reducing Tees
- Concentric / Eccentric Reducers
- Full / Half Couplings
- Reducing Couplings
- Caps
- Equal / Reducing Crosses
- Unions
- Hex / Reducing / Flash Bushings
- Hex / Round / Square Head Plugs
- Pipe Nipples
- Hex Nipples
- Concentric / Eccentric Swage Nipples
- Reducer Inserts
- Welding Boss
- Thermowell Stub
- Laterals
- Street Elbows
Dimension Standards
Our forged socket weld and threaded fittings are manufactured according to the following internationally recognized standards to ensure precise dimensions and interchangeability:
- ASME B16.11
- BS 3799
- BS EN 10241
- EN 10242
- IS 1239 PART 2
- MSS SP-79, MSS SP-83, MSS SP-95
Size Range
We offer a wide range of sizes to accommodate diverse piping needs:
- From 8 DN / ¼” NPS to 150 DN / 6” NPS
Class Ratings
Our fittings are available in various pressure ratings to meet both standard and high-pressure applications:
- 2000#, 3000#, 6000#, 9000#
- Sch 40 / STD, Sch 80 / XS, Sch 160, Sch XXS
- Medium, Heavy
Thread Types
Our threaded fittings are available in the following thread standards:
- NPT, BSP, API, Metric
Material Specifications
Our wide selection of materials ensures that our fittings meet diverse application requirements, providing strength, corrosion resistance, and durability.
- Stainless Steel Socket Weld & NPT BSP Threaded Pipe Fittings: ASTM/ASME A/SA 182 Gr. F304, F316, F321, F904L / UNS N08904 (SS 904L), F20 / UNS N08020 (Alloy 20), F44 / UNS S31254 (254 SMO / 6Mo)
- Duplex Stainless Steel Socket Weld & NPT BSP Threaded Pipe Fittings: ASTM/ASME A/SA 182 Gr. F51 (UNS S31803) & F60 (UNS S32205)
- Super Duplex Stainless Steel Socket Weld & NPT BSP Threaded Pipe Fittings: ASTM/ASME A/SA 182 Gr. F53 (UNS S32750) & F55 (UNS S32760)
- Alloy Steel Socket Weld & NPT BSP Threaded Pipe Fittings: ASTM/ASME A/SA 182 Gr. F5, F9, F11 (Class 1, 2 & 3), F22 (Class 1 & 2), F91, F92
- Low Alloy Steel Socket Weld & NPT BSP Threaded Pipe Fittings: ASTM/ASME A/SA 694 Gr. F42 to F70
- Carbon Steel Socket Weld & NPT BSP Threaded Pipe Fittings: ASTM/ASME A/SA 105, IS 1239 Part II
- Low Temperature Carbon Steel Socket Weld & NPT BSP Threaded Pipe Fittings: ASTM/ASME A/SA 350 Gr. LF1 to LF9
- Nickel Socket Weld & NPT BSP Threaded Pipe Fittings: ASTM/ASME B/SB 564 UNS N02200 (Nickel 200).
- Monel Socket Weld & NPT BSP Threaded Pipe Fittings: ASTM/ASME B/SB 564 UNS N04400 (Monel 400).
- Hastelloy Socket Weld & NPT BSP Threaded Pipe Fittings: ASTM/ASME B/SB 564 UNS N06022 (Hastelloy C22), N10276 (Hastelloy C276).
- Inconel Socket Weld & NPT BSP Threaded Pipe Fittings: ASTM/ASME B/SB 564 UNS N06600 (Inconel 600), N06625 (Inconel 625).
- Incoloy Socket Weld & NPT BSP Threaded Pipe Fittings: ASTM/ASME B/SB 564 UNS N08800 (Incoloy 800), N08825 (Incoloy 825).
- Alloy 20 Socket Weld & NPT BSP Threaded Pipe Fittings: .
- SS 904L Socket Weld & NPT BSP Threaded Pipe Fittings: .
- Titanium Socket Weld & NPT BSP Threaded Pipe Fittings: .
- 254 SMO Socket Weld & NPT BSP Threaded Pipe Fittings:
- Copper Nickel Socket Weld & NPT BSP Threaded Pipe Fittings:
- Copper Socket Weld & NPT BSP Threaded Pipe Fittings:
- Brass Socket Weld & NPT BSP Threaded Pipe Fittings:
- Aluminium Socket Weld & NPT BSP Threaded Pipe Fittings:
- Titanium Socket Weld & NPT BSP Threaded Pipe Fittings: ASTM/ASME B/SB 381 Gr. F1 to F11 (Titanium Grades 1-11)
Key Benefits
Our fittings come with comprehensive testing and certification to meet the highest industry standards:
- Test Certificates: Provided according to EN 10204 3.1 / 3.2 / DIN 50049 3.1
- IBR Test Certificates: As per IBR Form IIIC or IIIG
- Galvanization Options: Hot Dip Galvanized as per IS 2629 / IS 4736 / ASTM A 153, or Electro-Plated Galvanized
- Specialized Testing: Available for Hydrogen Induced Cracking (HIC), Sulphide Stress Cracking (SSC), Hydrogen Sulphide (H₂S), NACE MR 0175 / 0103, ISO 15156
- PED Approved Mills: Ensuring compliance with Pressure Equipment Directive standards
- Hot Tensile Testing: Available for validating material strength
- Non-Destructive Testing (NDT): Including Ultrasonic Testing (UT), Dye Penetrant Testing (DPT), Liquid Penetrant Testing (LPT), Magnetic Particle Testing (MPT), and coating thickness checks
At Alliance Pipes & Fittings, we deliver high-performance forged socket weld and threaded fittings that ensure durability, safety, and efficiency for your projects. Our comprehensive range of products and materials is designed to withstand the most demanding applications. Trust us to provide exceptional quality and reliability, backed by rigorous testing and industry certifications.