ASME / ANSI B16.5 Stainless Steel Flanges, Alloy Steel Flanges, Hastelloy Flanges, Carbon Steel Flanges Inconel Flanges, Nickel Alloy Flanges Manufacturer, Suppliers & Exporter in India
Amardeep Steel Centre is a leading flanges supplier, manufacturer and exporter based in Mumbai, India. We supply all types of ASME B16.5 flanges including Weld Neck Flanges, Slip-On Flanges, Blind Flanges, Socket Weld Flanges, Orifice Flanges, RTJ Flanges and Spectacle Blind Flanges. Available in Stainless Steel, Carbon Steel, Alloy Steel, Nickel Alloy, Duplex Steel, Hastelloy, Inconel and Titanium, conforming to ASTM A182, ASME B16.5, ASME B16.47, DIN, BS and EN 1092-1 standards.
What Are Flanges?
A flange is a mechanical coupling device used to connect pipes, valves, pumps and other process equipment into a complete piping system. Two flanges are bolted together with a gasket sandwiched between the mating faces, creating a pressure-tight, leak-proof seal that can be easily disassembled for maintenance, inspection or modification.
Flanges are used across virtually every process industry from oil & gas and petrochemicals to power generation, pharmaceuticals and water treatment. Their design varies by how they attach to the pipe (welded, threaded or loose), how their mating faces are finished (Raised Face, Flat Face, RTJ), and the pressure class they are rated for.
At Amardeep Steel Centre, we manufacture and supply flanges to the most demanding global specifications ASME B16.5, ASME B16.47, EN 1092-1, DIN, BS 4504 and JIS — in an extensive range of metallic alloys for high-temperature, high-pressure and corrosive service conditions.
½"–48" Size Range (NB) | 12+ Flange Types | 15+ Material Grades | 7 Pressure Classes (ASME) | 50+ Countries Served
Shop by Flange Type
We manufacture all major flange types to ASME, DIN, EN and BS standards. Each type is suited to a specific connection method and service condition. Click any type for full dimensional data and grades.
Weld Neck Flanges (WNRF)
ASME B16.5
Long tapered hub welded to the pipe. Ideal for high-pressure, high-temperature and cyclic service. Offers excellent stress distribution and radiographic weld inspection.
View Weld Neck Flanges →Slip-On Flanges (SORF)
ASME B16.5
Slides over the pipe OD and is fillet-welded inside and outside. Lower cost than weld neck; suitable for moderate pressure and non-critical piping systems.
View Slip-On Flanges →Blind Flanges (BLRF)
ASME B16.5
Solid plate flange used to blank off or seal a pipe end, nozzle or valve opening. Must withstand full system pressure; widely used in pressure vessel and storage applications.
View Blind Flanges →Socket Weld Flanges (SWRF)
ASME B16.5
Pipe inserts into the socket and is fillet-welded externally. Used in small-bore, high-pressure lines (Class 3000 & 6000). Provides smooth bore for improved flow.
View Socket Weld Flanges →Threaded / Screwed Flanges
ASME B16.5
Internally threaded flange that screws onto an externally threaded pipe. Used where welding is not feasible — highly flammable environments or on-site modifications.
View Threaded Flanges →Orifice Flanges
ASME B16.5 / API 6A
Designed with tapped holes for pressure differential measurement. Used in pairs to house an orifice plate for flow metering in oil, gas and water systems.
View Orifice Flanges →RTJ Flanges (Ring Type Joint)
ASME B16.5 / B16.20
Groove machined into the flange face accepts a metal ring gasket (oval or octagonal). Used in subsea, wellhead, and high-pressure refinery service for superior sealing.
View RTJ Flanges →Spectacle Blind Flanges
ASME B16.48
Combination of a solid blind disc and an open ring (spacer), connected by a web. Rotated to isolate or allow flow — ideal for permanent isolation points in process piping.
View Spectacle Blinds →Reducing Flanges
ASME B16.5
Connects pipes of two different sizes in a single fitting. Eliminates the need for a separate reducer fitting, saving space and weight in compact piping layouts.
View Reducing Flanges →Groove & Tongue Flanges
ASME B16.5
Mating faces have a raised tongue and matching groove. Extremely accurate seating of the gasket; common in pumps, compressors and cryogenic service.
View G&T Flanges →Plate Flanges (Flat Face)
ASME B16.5 / DIN
Simple flat-plate design with a flat face. Used with full-face gaskets in low-pressure service and when connecting to cast iron or non-metallic equipment.
View Plate Flanges →DIN / EN 1092-1 Flanges
DIN 2501 / EN 1092-1
European standard flanges with PN pressure ratings (PN6 to PN100). Required for projects in Europe, Middle East and wherever metric/DIN specifications are specified.
View DIN Flanges →Flange Specifications
Complete specification range for all flanges supplied by Amardeep Steel Centre.
| Parameter | Details |
|---|---|
| Size Range | 1/2" (15 NB) to 48" (1200 NB) · DN10 to DN5000 |
| Standards | ASME B16.5, B16.47 Series A & B, B16.48, B16.36 · BS 4504, BS 10, BS 1560 · EN 1092-1 · DIN 2501 · JIS B2220 · MSS SP44 · API 6A · GOST 12820 · AWWA C207 |
| ANSI Pressure Ratings | Class 150, 300, 400, 600, 900, 1500, 2500 LBS |
| DIN / EN Pressure Ratings | PN6, PN10, PN16, PN25, PN40, PN64, PN100 |
| JIS Pressure Ratings | 5K, 10K, 16K, 20K, 30K, 40K, 63K |
| Face Types | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Lap Joint (LJ), Large Male-Female (LMF), Small Male-Female (SMF), Tongue & Groove (T&G) |
| Manufacturing Method | Forged, Heat Treated & Machined · Threaded · Plate / Cut Flange |
| Surface Coating | Black Oil Paint · Anti-Rust Epoxy · Zinc Plated · Hot/Cold Dip Galvanised |
| Test Certificates | EN 10204 / 3.1B · Raw Material Certificate · 100% Radiography Test Report · Third-Party Inspection (SGS, BV, TUV, Lloyds) · Hydrostatic Test |
| Testing Equipment | Direct-Reading Spectrograph · Hydrostatic Testing Machine · X-Ray Detector · Ultrasonic Flaw Detector · Magnetic Particle Detector |
| Country of Origin | India · Western Europe · Japan · USA · South Korea |
ASME B16.5 Pressure Ratings
ASME B16.5 flanges are rated by pressure class. Higher class numbers indicate higher allowable working pressures. The table below gives indicative pressures at ambient temperature for carbon steel; actual ratings vary by material and temperature.
| ANSI Class | Max Pressure (Bar, ambient) | Temperature Range | Typical Application | DIN Equivalent |
|---|---|---|---|---|
| 150 LBS | 19.6 bar | -29°C to 538°C | General utility, water, low-pressure steam | PN20 |
| 300 LBS | 51.1 bar | -29°C to 538°C | Medium-pressure gas, chemical service | PN50 |
| 400 LBS | 68.1 bar | -29°C to 538°C | High-temperature steam, process piping | PN64 |
| 600 LBS | 102 bar | -29°C to 538°C | Refinery, boiler, power generation | PN100 |
| 900 LBS | 153 bar | -29°C to 538°C | High-pressure process, HP steam | PN150 |
| 1500 LBS | 255 bar | -29°C to 538°C | Oil & gas, wellhead, HP pipelines | PN250 |
| 2500 LBS | 425 bar | -29°C to 538°C | Subsea, HP/HT, offshore production | PN420 |
Shop by Flange Material
All flanges are available in a comprehensive range of engineering alloys selected for corrosion resistance, mechanical strength, and compatibility with the process fluid and temperature.
Stainless Steel Flanges
Austenitic, high corrosion resistance. Grades: F304, F304L, F316, F316L, F321, F347, 904L.
View Stainless Steel FlangesCarbon Steel Flanges
A105, LF2 general industrial flanges. Grades: ASTM A105, A350 LF2, A694 F52/F60/F65.
View Carbon Steel FlangesAlloy Steel Flanges
Cr-Mo flanges for high temperature and high pressure. Grades: F1, F5, F9, F11, F22, F91.
View Alloy Steel FlangesDuplex Steel Flanges
F51 / F53 dual-phase structure for offshore and chloride-rich service.
View Duplex Steel FlangesHastelloy Flanges
Extreme corrosion resistance. Grades: Hastelloy C276, C22, B2, B3, X.
View Hastelloy FlangesInconel Flanges
High-temperature nickel-chromium alloys. Grades: 600, 601, 625, 718, 800, 825.
View Inconel FlangesTitanium Flanges
ASTM B381 ultra lightweight flanges. Grades: Grade 1, Grade 2, Grade 5.
View Titanium FlangesNickel Alloy Flanges
High performance alloys including Alloy 200/201, 400, 600, 625, 825.
View Nickel Alloy FlangesMonel Flanges
Copper-nickel alloys for marine and seawater service. Grades: Monel 400, K-500.
View Monel FlangesCopper Nickel Flanges
90/10 and 70/30 Cupronickel flanges for seawater and condenser systems.
View Copper Nickel FlangesSuper Duplex Flanges
S32750 / S32760 chloride-resistant flanges for severe offshore applications.
View Super Duplex FlangesAluminium Flanges
Lightweight corrosion-resistant flanges in 1060, 5083 and 6061-T6.
View Aluminium FlangesASTM A182 Grade Reference
ASTM A182 is the governing specification for forged alloy and stainless steel pipe flanges, fittings and valves intended for high-temperature service. All applicable Amardeep Steel flanges conform to ASTM A182 / ASME SA182 with full heat-to-test traceability.
- ASTM A182 F304 / F304L - Austenitic SS, general corrosion service
- ASTM A182 F316 / F316L - Austenitic SS, chloride & marine environments
- ASTM A182 F321 / F321H - Ti-stabilised SS, elevated temperature service
- ASTM A182 F347 / F347H - Nb-stabilised SS, nuclear & boiler applications
- ASTM A182 F11 / F22 / F91 - Cr-Mo alloy steel, high-pressure / high-temperature
- ASTM A182 F91 - 9Cr-1Mo-V ultra-high-temperature, creep-resistant power plant service
- ASTM A182 F5 / F9 - refinery and petrochemical high-temperature service
- ASTM A182 F51 / F53 - Duplex & Super Duplex SS for offshore and chloride-rich environments
Flange Standards & Norms
Amardeep Steel Centre manufactures flanges to a comprehensive set of international standards and pressure norms. Whether your project specifies ASME, DIN, BS, EN or JIS, we can supply to specification.
- ASME / ANSI Standards: B16.5, B16.47 Series A & B, B16.48, B16.36, B16.20, MSS SP44
- British Standards: BS 4504 Sec 3.1 & Part 1, BS 10, BS 1560 BOSS, BS 3293
- DIN / European Standards: DIN 2527, 2566, 2573, 2576, 2627-2638, 2641, 2642, 2655, 2656, 2673, EN 1092-1
- Japanese Industrial Standard: JIS B2220, KS B1503
- API Standards: API 6A, API 605, API 7S-15 & 7S-43
- Other International Standards: AWWA C207, GOST 12820, ISO 70051, SABS 1123, NFE 29203, UNI 2276, AS 2129
Flange Applications
Amardeep Steel flanges are trusted in the world's most demanding process industries. Our materials and certifications are selected to meet strict safety, pressure and corrosion-resistance requirements.
- Oil & Gas: Upstream, midstream & downstream pipelines, wellheads and refineries
- Petrochemicals: Chemical plants, cracker units, acid and caustic process piping
- Power Generation: High-pressure steam lines, nuclear plants, gas turbines and boilers
- Marine & Offshore: Subsea pipelines, offshore platforms, FPSO and shipbuilding
- Pharmaceutical: Hygienic SS flanges for sterile process and clean-room piping
- Water Treatment: Water supply, desalination, wastewater and irrigation systems
- Construction & EPC: Infrastructure, industrial plants, fabrication shops & EPC contractors
- Acids & Corrosives: Hastelloy, Titanium and Nickel flanges for aggressive chemical service
Why Amardeep Steel for Flanges?
- ISO-compliant manufacturing facility in Mumbai
- Full traceability with heat number marked on every piece
- EN 10204 Type 3.1 mill test certificates as standard
- Third-party inspection by SGS, BV, TUV and Lloyds available
- Radiographic and ultrasonic testing on request
- Fast lead times with ex-stock supply on common grades
- EIL approved vendor
- Exporting to 50+ countries since decades
Price List of ANSI B16.5 Flanges
We offer competitively priced SS Flanges products for a wide range of industrial and commercial applications. Please call or email us to request the latest price list, ready stock availability, and a customized quotation based on your requirements.
Frequently Asked Questions
What is a flange and what is it used for?
A flange is a mechanical coupling used to join pipes, valves, pumps and other process equipment into a piping system. Two flanges are bolted together with a gasket between their mating faces to form a pressure-tight seal. They also allow easy access for cleaning, inspection or modification of the system.
What flange standards does Amardeep Steel Centre supply?
We supply flanges to ASME/ANSI B16.5, B16.47 Series A & B, B16.48, B16.36, BS 4504, BS 10, BS 1560, EN 1092-1, DIN 2501, JIS B2220, MSS SP44, API 6A, GOST 12820 and AWWA C207, covering virtually all global project specifications.
What pressure classes are available for ASME B16.5 flanges?
ASME B16.5 flanges are available in Class 150, 300, 400, 600, 900, 1500 and 2500 LBS. These correspond approximately to DIN/EN pressure ratings from PN20 through PN420. Class selection depends on operating pressure, temperature and material.
What size range of flanges is available?
Standard supply range is 1/2" (15 NB / DN15) up to 48" (1200 NB / DN1200). Custom sizes up to DN5000 are available on request. Both equal and reducing configurations are supplied.
What is ASTM A182 and why does it matter?
ASTM A182 is the standard specification for forged alloy and stainless steel pipe flanges, fittings and valves for high-temperature service. All Amardeep Steel flanges in alloy and stainless steel conform to ASTM A182 / ASME SA182.
What face types are available?
We supply all major face types including Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Lap-Joint (LJ), Large Male-Female (LMF), Small Male-Female (SMF), and Tongue & Groove (T&G).
Does Amardeep Steel export internationally?
Yes. We export to over 50 countries across the Middle East, Europe, USA, Southeast Asia, Africa and Australia. Exports include EN 10204 3.1 MTCs and can be supported with third-party inspection, MSDS, country-of-origin certificates and other trade documents.
What is the difference between Weld Neck and Slip-On flanges?
A Weld Neck Flange has a long tapered hub that is butt-welded to the pipe end and is preferred for high-pressure, high-temperature and cyclic service. A Slip-On Flange slides over the pipe and is fillet-welded on both sides; it is lower cost and easier to align.
Request a Quote for Flanges
We export to 50+ countries. Send us your requirements: size, grade, standard, quantity, and we will respond with pricing, lead time and stock availability within 24 hours.
