Inconel Flanges Supplier in India
Amardeep Steel is a prominent manufacturer, supplier, and exporter of high-performance nickel alloy flanges, delivering premium-quality products to industries worldwide. We use the latest technology and finely optimized materials in creating our flanges to make them long-lasting, dependable and resistant to corrosion.
They are widely used in aerospace, oil and gas, chemical processing, marine, and power generation industries due to their ability to withstand extreme temperatures and pressures. These flanges are very important in developing safe and leak resistant connections in challenging piping systems.
Our products are a complete line of ASTM B564 flanges in Slip-On, Weld Neck, Socket Weld, Blind, Orifice, RTJ (Ring Type Joint) and in a variety of sizes and specifications. All products meet international standards like ANSI B16.5, B16.47, EN-1092 and ASTM B564.
Inconel 625 Slip-On, Inconel 601 Weld Neck and Inconel 718 Socket Weld are popular in high pressure and high temperature applications. They have good weldability, oxidation and scaling resistance and suit harsh operating conditions.
These flanges are commonly used in jet engines, gas turbines, refineries, heat exchangers, boilers, and offshore platforms. All the products are subjected to rigorous checks on quality in order to maintain uniform performance and conformity to standards of the market.
We have an effective logistics network that allows us to deliver to the whole world including the USA, UK, Germany, UAE and Australia. Amardeep Steel is a reliable supplier of industrial flange needs with competitive prices and technical knowhow.
Our products offer tailor-made solutions depending on the requirements of a particular application, thereby providing stability in performance in a broad spectrum of environments.
What are Inconel Flanges?
Inconel flanges are pipe fittings used to create strong, leak-proof connections in piping and equipment systems. They are manufactured from nickel-chromium alloys that offer high strength and excellent resistance to corrosion.
This makes them suitable for applications involving high temperatures, extreme pressures, and aggressive environments. These flanges are produced in accordance with ASTM B564 specifications, ensuring compliance with industry standards.
Key advantages include resistance to oxidation, scaling, and thermal fatigue at elevated temperatures. Their good weldability also allows easy fabrication and customization.
Due to these properties, they are widely used in industries such as aerospace, chemical processing, oil and gas, marine, and power generation. Explore our high-quality Inconel Products, such as pipes, tubes, flanges, and fittings, designed for outstanding durability and resistance to corrosion.
Explore Inconel Flanges Grades
We manufacture and supply flanges across all primary Inconel grades. Select your grade below for full technical specifications, chemical composition, mechanical properties, and pricing details:
- Inconel 600 Flanges
- Inconel 601 Flanges
- Inconel 625 Flanges
- Inconel 718 Flanges
- Inconel 800 Flanges
- Inconel 800H Flanges
- Inconel 800HT Flanges
- Inconel 825 Flanges
- Inconel 690 Flanges
Inconel Flanges Specifications (ASTM B564 and ASME SB564)
| Parameter | Details |
|---|---|
| Specification | ASTM B564 / ASME SB564 |
| Applicable Standard | ANSI/ASME B16.5, B16.47 Series A and B, B16.48, B16.36, BS4504, BS 10, EN-1092, DIN, JIS B2220, GOST 12820 |
| Size Range | 1/2 inch NB (15 NB) to 60 inch NB (1500 NB) |
| Pressure Classes (ANSI) | Class 150, 300, 400, 600, 900, 1500, 2500 |
| Pressure Classes (DIN/EN) | PN6, PN10, PN16, PN25, PN40, PN64, PN100 |
| Pressure Classes (JIS) | 5K, 10K, 16K, 20K, 30K, 40K |
| Pressure Classes (BS) | Table D, E, F, H |
| Flange Face Types | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Tongue and Groove (T&G), Male and Female (M&F), Lap Joint Face (LJ) |
| Flange Types | Weld Neck, Slip On, Blind, Socket Weld, Threaded, Lap Joint, Long Weld Neck, Orifice, Spectacle Blind, Reducing, Ring Type Joint, Plate Flange |
| Production Method | Forged and heat-treated per ASTM B564. CNC-machined to dimensional tolerances per ASME B16.5. |
| Test Certificates | EN 10204/3.1B, EN 10204/3.2 (on request), Raw Material Certificate, PMI (Positive Material Identification), Radiography Test Report, Third-Party Inspection Report |
| Surface Finish Options | Mirror finish, stock finish, serrated finish (spiral or concentric), smooth finish, cold water finish |
| Grades Available | Inconel 600, 601, 625, 690, 718, 750 (X-750), 800, 800H, 800HT, 825, 330 |
Chemical Composition of Inconel Pipe Flanges (ASTM B564)
All Inconel flange heats supplied by Amardeep Steel are verified against mill certificates traceable to the originating melt. The chemical composition limits below are per ASTM B564 / ASME SB564 for the most commonly specified grades:
| Grade | Ni % | Cr % | Fe % | Mo % | C % max | Mn % max | Si % max |
|---|---|---|---|---|---|---|---|
| Inconel 600 | 72.00 min | 14.00 to 17.00 | 6.00 to 10.00 | n/a | 0.15 | 1.00 | 0.50 |
| Inconel 601 | 58.0 to 63.0 | 21.0 to 25.0 | Balance | n/a | 0.10 | 1.00 | 0.50 |
| Inconel 625 | 58.0 min | 20.0 to 23.0 | 5.0 max | 8.0 to 10.0 | 0.10 | 0.50 | 0.50 |
| Inconel 718 | 50.0 to 55.0 | 17.0 to 21.0 | Balance | 2.80 to 3.30 | 0.08 | 0.35 | 0.35 |
| Inconel 825 | 38.0 to 46.0 | 19.5 to 23.5 | Balance | 2.50 to 3.50 | 0.05 | 1.00 | 0.50 |
Mechanical Properties of ASTM B564 Inconel Flanges
Minimum mechanical property requirements for Inconel forged flanges per ASTM B564. Values shown are for the annealed or solution-annealed condition unless noted:
| Grade | Density g/cm3 | Melting Range C | Tensile Strength MPa min | Yield Strength MPa min | Elongation % min | Max Service Temp C |
|---|---|---|---|---|---|---|
| Inconel 600 | 8.47 | 1354 to 1413 | 655 | 310 | 40 | 1093 |
| Inconel 601 | 8.10 | 1300 to 1411 | 550 | 205 | 30 | 1175 |
| Inconel 625 | 8.44 | 1290 to 1350 | 930 | 517 | 42.5 | 982 |
| Inconel 718 | 8.19 | 1260 to 1336 | 930 | 482 | 45 | 704 |
| Inconel 825 | 8.14 | 1370 to 1400 | 586 | 241 | 30 | 540 |
Inconel 625 Flange Pressure Ratings by Class and Temperature
ASME B16.5 pressure-temperature ratings for Inconel 625 (Group 3.3) flanges in bar. These ratings govern the maximum allowable working pressure at the stated temperature. Consult ASME B16.5 Table 2-1.3 for the full rating table applicable to your design code:
| Temp (C) | Class 150 | Class 300 | Class 400 | Class 600 | Class 900 | Class 1500 | Class 2500 |
|---|---|---|---|---|---|---|---|
| -29 to 38 | 20.0 | 51.7 | 68.9 | 103.4 | 155.1 | 258.6 | 430.9 |
| 100 | 17.7 | 51.5 | 68.7 | 103.0 | 154.6 | 257.6 | 429.4 |
| 200 | 13.8 | 48.6 | 64.8 | 97.2 | 145.8 | 243.4 | 405.4 |
| 300 | 10.2 | 42.9 | 57.0 | 85.7 | 128.6 | 214.4 | 357.1 |
| 400 | 6.5 | 36.5 | 48.9 | 73.3 | 109.8 | 183.1 | 304.9 |
| 500 | 2.8 | 28.2 | 37.6 | 56.5 | 84.7 | 140.9 | 235.0 |
| 538 | 1.4 | 16.5 | 22.1 | 33.1 | 49.6 | 82.7 | 137.9 |
| 600 | n/a | 6.6 | 8.9 | 13.3 | 19.9 | 33.2 | 55.3 |
Inconel Flange Grade Equivalents Across International Standards
Procurement specifications frequently reference the same nickel alloy material by different designations depending on the originating standard. The equivalency table below covers the four most commonly specified Inconel flange grades:
| Grade | UNS | DIN / W.Nr. | JIS | BS | EN | GOST |
|---|---|---|---|---|---|---|
| Inconel 600 | N06600 | 2.4816 | NCF 600 | NA 13 | NiCr15Fe | MNZhMTs 28-2.5-1.5 |
| Inconel 601 | N06601 | 2.4851 | NCF 601 | NA 49 | NiCr23Fe | KhN60VT |
| Inconel 625 | N06625 | 2.4856 | NCF 625 | NA 21 | NiCr22Mo9Nb | KhN75MBTYu |
| Inconel 718 | N07718 | 2.4668 | n/a | n/a | n/a | n/a |
Standards and Codes Applicable to Inconel Pipe Flanges
Every Inconel flange manufactured and supplied by Amardeep Steel complies with one or more of the standards listed below. Certificates of conformance are provided with each shipment:
| Standard | Scope |
|---|---|
| ASTM B564 / ASME SB564 | Specification for nickel alloy forgings, including flanges, fittings and valves for corrosion-resistant and high-temperature service. |
| ANSI/ASME B16.5 | Pipe flanges and flanged fittings NPS 1/2 inch to NPS 24 inch. Covers dimensions, tolerances, materials, ratings and marking. |
| ANSI/ASME B16.47 | Large diameter steel flanges NPS 26 inch to NPS 60 inch, Series A (MSS SP-44) and Series B (API 605). |
| ANSI/ASME B16.36 | Orifice flanges NPS 2 inch to NPS 24 inch, Classes 300 to 2500. |
| ANSI/ASME B16.48 | Line blanks (spectacle blinds, spades and spacers), NPS 1/2 inch to NPS 24 inch. |
| ASME B31.1 / B31.3 | Power piping and process piping design codes. Govern the selection, rating and installation of flanged joints. |
| EN 1092-1 | European standard for circular flanges for pipes, valves, fittings and accessories, PN designations. |
| DIN 2527 to 2638 | German DIN series covering plate, slip-on, weld neck, blind and threaded flanges in PN6 to PN100. |
| BS 4504 / BS 10 / BS 1560 | British Standard flanges covering PN2.5 to PN400 and imperial pressure tables D, E, F and H. |
| JIS B2220 | Japanese Industrial Standard for steel pipe flanges, Classes 5K to 40K. |
| GOST 12820 / 12821 | Russian GOST standard for flat and weld neck flanges, PN1 to PN200. |
| NACE MR0175 / MR0103 | Sulfide stress cracking (SSC) resistance requirements for sour service environments in oil and gas production. |
Types Of Inconel Flanges (with images)
We provide a comprehensive range of Inconel Flanges to meet every industrial requirement.
- ASTM B564 Inconel Slip On Flanges
- ASTM B564 Inconel Socket Weld Flanges
- ASTM B564 Inconel Blind Flanges
- ASTM B564 Inconel Weld Neck Flanges
- ASTM B564 Inconel Spectacle Blind Flanges
- ASTM B564 Inconel Threaded / Screwed Flanges
- ASTM B564 Inconel Lap Joint Flanges
- ASTM B564 Inconel Long Weld Neck Flanges
- ASTM B564 Inconel Plate Flanges
- ASTM B564 Inconel Ring Type Joint Flanges
- ASTM B564 Inconel Tongue & Groove Flanges
- ASTM B564 Inconel Reducing Flanges
Applications for Inconel Pipe Flanges
Inconel flanges are specified wherever a standard carbon steel or stainless steel flange cannot meet the combined demands of temperature, pressure and corrosive environment. Below are the primary industry sectors and specific applications where Amardeep Steel supplies Inconel pipe flanges:
Oil and Gas (Upstream): Wellhead and Christmas tree connections, high-pressure flowlines, sour service headers. Inconel 625 for NACE MR0175 compliance; Inconel 718 for high-strength downhole flanges.
Oil and Gas (Downstream): Crude distillation columns, naphtha reformers, sulfur recovery units and flue gas desulfurisation systems. Inconel 600 and 601 for high-temperature refinery applications.
Petrochemical Processing: Reactor inlet and outlet nozzles, heat exchanger flanges, piping in HF alkylation and ethylene cracking units. Inconel 625 for corrosive media service; Inconel 800HT for high-temperature creep service.
Aerospace: Turbine engine hot section flanges, afterburner connections, exhaust manifold joints. Inconel 718 and X-750 for their exceptional strength-to-weight ratio at elevated temperatures.
Nuclear Power: Steam generator nozzles, pressuriser heater sleeves and reactor coolant system flanges. Inconel 690 for its superior resistance to stress corrosion cracking in high-temperature water.
Marine and Offshore: Subsea manifold flanges, riser connections, seawater cooling system piping, ballast and firewater headers. Inconel 625 for its outstanding resistance to seawater pitting and crevice corrosion.
Power Generation: Superheater and reheater outlet headers, gas turbine combustion liners, waste heat boiler piping. Inconel 601 and 800H for long-term high-temperature oxidation and creep resistance.
Chemical Processing: Flanged connections in sulfuric acid plants, phosphoric acid systems, ammonium nitrate plants and pharmaceutical synthesis reactors. Inconel 825 and 625 for acid resistance.
Fertiliser Industry: Urea synthesis loop flanges operating at high temperature and high pressure with corrosive ammonium carbamate media. Inconel 625 or 825 for combined temperature and acid resistance.
Food and Beverage: Sanitary process line connections, CIP (clean-in-place) systems and autoclave connections requiring full corrosion resistance and hygienic surface finish. Inconel 625 for chloride-bearing cleaning agents.
Related Products
- Inconel Pipes & Tubes
- Inconel Plates, Sheets & Coils
- Inconel Bars, Rods & Wires
- Inconel Forged Fittings
- Inconel Flanges
- Inconel 690 Flanges
- Inconel Buttweld Fittings
- Inconel Fasteners
Frequently Asked Questions About Inconel Flanges
1. What is the most widely specified Inconel grade for flanges?
Inconel 625 (UNS N06625, DIN 2.4856) is the most commonly specified grade for industrial Inconel pipe flanges. Its combination of high strength, outstanding corrosion resistance across a wide range of environments including seawater, chloride solutions and reducing acids, and NACE MR0175 compliance makes it the default choice for offshore, marine and sour gas service. Inconel 600 and 601 are preferred for high-temperature atmospheric and carburising service, while Inconel 718 is specified where high mechanical strength is the primary requirement.
2. What sizes and pressure classes do you supply?
Amardeep Steel supplies Inconel pipe flanges from 1/2 inch NB to 60 inch NB across all ANSI/ASME B16.5 pressure classes from Class 150 to Class 2500. For large-diameter flanges (NPS 26 inch to 60 inch), we comply with ASME B16.47 Series A and Series B. DIN and EN flanges are supplied in PN6 to PN100. Custom sizes and non-standard borings are available on request with a typical lead time of 3 to 5 weeks.
3. Do you supply Inconel flanges with IBR certification?
Yes. We supply Inconel flanges with IBR (Indian Boiler Regulation) certification for power generation, boiler and pressure vessel applications in India. IBR-certified flanges come with a separate IBR Form 3C test certificate in addition to the standard EN 10204/3.1 MTC. Please specify IBR certification in your enquiry.
4. What is the difference between ASTM B564 and ASME SB564?
ASTM B564 is the specification published by ASTM International for nickel alloy forgings. ASME SB564 is the identical specification adopted by the American Society of Mechanical Engineers for use within the ASME Boiler and Pressure Vessel Code (BPVC). A flange marked SB564 is dimensionally and chemically identical to one marked B564. Projects governed by ASME BPVC Section III or Section VIII typically require SB564 designation. Our flanges can be certified to either or both designations.
5. What test certificates do you provide with Inconel flanges?
Standard supply includes EN 10204/3.1 mill test certificates signed by our quality department. For projects requiring third-party validation, we provide EN 10204/3.2 certificates witnessed by TUV, SGS, Lloyd's Register, Bureau Veritas or DNV-GL. Additional documentation available includes PMI (Positive Material Identification) test reports, hardness test reports, 100% radiography reports, hydrostatic test reports, NACE MR0175 compliance certificates, and dimensional inspection reports.
6. How quickly can Inconel flanges be dispatched?
Standard Inconel 625 and 600 flanges in common sizes and Class 150 to 600 are typically available from stock and can be dispatched within 3 to 7 business days. Non-standard sizes, higher pressure classes (900 to 2500), rare grades (718, 825, 690), or large-volume project orders have lead times of 3 to 6 weeks depending on specification. Contact our sales team with your line list for a confirmed delivery schedule.
7. Can you supply Inconel 625 flanges for subsea service?
Yes. Inconel 625 is the primary material used in subsea flange connections due to its exceptional resistance to seawater pitting and crevice corrosion, combined with high strength and NACE MR0175 compliance for sour service. We supply subsea-grade Inconel 625 flanges with full traceability, EN 10204/3.2 certification, and surface finishes to project specifications. Rubber compound or metal ring gaskets for RTJ flanges can be co-supplied on request.
8. What is the minimum order quantity for Inconel pipe flanges?
There is no fixed minimum order quantity. We supply from single pieces for urgent maintenance requirements to full project volumes for large EPC contracts. For stocked sizes in Inconel 625 and 600, single-piece orders are accepted. For non-stocked grades or special specifications, we recommend a minimum of 5 to 10 pieces per size to justify the setup cost, though this is not a strict requirement. Please contact us for project-specific pricing regardless of order size.
Send us your line list or specification sheet and receive a detailed quote with availability and lead time within 24 hours. Amardeep Steel's technical sales team is ready to support your project from initial enquiry through to final delivery.
