ASTM A182 stainless steel flanges are widely used in high pressure and high temperature piping systems across oil & gas, petrochemical, power Generation and industrial applications. The ASTM A182 specification covers forged or rolled alloy and stainless steel pipe flanges, forged fittings, and valve parts designed for demanding service conditions.
We Supply a full range of ASTM A182 stainless steel flanges in various grades, including austenitic, stabilized, duplex and super duplex stainless steels. Our products are manufactured in compliance with ASME B16.5 dimensional standards and are available in multiple
sizes, pressure classes and flange types to meet different project requirements.
ASTM A182 Standard Overview
ASTM A182 is a material specification for forged or rolled alloy and stainless steel pipe flanges, forged fittings, valves, and similar components designed for high temperature and high pressure service. Compared with carbon steel standards, ASTM A182 stainless steel grades provide superior corrosion resistance, oxidation resistance, and mechanical stability in demanding environments.
Different ASTM A182 grades are developed to address specific service conditions such as chloride corrosion, high-temperature operation, offshore exposure, and aggressive chemical media. Selecting the correct grade is essential for ensuring safety, performance, and service life of piping systems.
ASTM A182 Stainless Steel Grades
SEMETAL GROUP offers full coverage of ASTM A182 stainless steel flange grades. Each grade provides distinct performance characteristics suitable for different operating conditions.
Austenitic Stainless Steel Grades
ASTM A182 F304 / F304L Stainless Steel Flanges
General-purpose austenitic stainless steel flanges with good corrosion resistance, formability, and cost efficiency. Widely used in general industrial and chemical applications.
π ASTM A182 F304L Stainless Steel Flanges
ASTM A182 F316 / F316L Stainless Steel Flanges
Molybdenum-containing stainless steel flanges offering enhanced resistance to pitting and crevice corrosion in chloride-containing environments, suitable for chemical and marine applications.
π ASTM A182 F316 Stainless Steel Flanges
Stabilized Stainless Steel Grades
ASTM A182 F321 Stainless Steel Flanges
Titanium-stabilized stainless steel flanges designed for high temperature service, providing excellent resistance to intergranular corrosion during prolonged exposure to elevated temperatures.
π ASTM A182 F321 Stainless Steel Flanges
ASTM A182 F347 Stainless Steel Flanges
Niobium-stabilized stainless steel flanges with improved creep resistance and structural stability for continuous high-temperature applications.
π ASTM A182 F347 Stainless Steel Flanges
Duplex & Super Duplex Stainless Steel Grades
ASTM A182 F51 Duplex Stainless Steel Flanges (2205)
Duplex stainless steel flanges combining high mechanical strength with excellent resistance to stress corrosion cracking and pitting corrosion, ideal for offshore and seawater systems.
π ASTM A182 F51 Duplex Stainless Steel Flanges
ASTM A182 F53 Super Duplex Stainless Steel Flanges (2507)
Super duplex stainless steel flanges offering superior corrosion resistance and strength for highly aggressive environments, including offshore oil & gas and chemical processing.
π ASTM A182 F53 Super Duplex Stainless Steel Flanges
Flange Types & Dimensional Standards
We supply ASTM A182 stainless steel flanges in commonly used flange types, including:
- Weld Neck Flange (WN)
- Blind Flange (BL)
- Slip-On Flange (SO)
- Socket Weld Flange (SW)
- Threaded Flange (TH)
- Lap Joint Flange (LJ)
- Orifice Flanges
All flanges are manufactured according to ASME B16.5 dimensional standards. Other flange types, pressure ratings, or dimensional standards can be provided upon request based on project requirements.
Applications of ASTM A182 Stainless Steel Flanges
ASTM A182 stainless steel flanges are widely applied in industries requiring reliable performance under severe operating conditions, including:
- Oil & Gas Pipelines
- Petrochemical and Chemical Processing Plants
- Power Generation Systems
- Heat Exchangers and Boilers
- Offshore and Marine Engineering
- High Pressure and High Temperature Piping Systems
Quality Control & Certification
All ASTM A182 stainless steel flanges are produced under strict quality control procedures. Chemical composition, mechanical properties, and dimensional tolerances fully comply with ASTM A182 and ASME B16.5 requirements.
Mill test certificates EN 10204 3.1 are available for all supplied products.
Packaging & Delivery
Packaging
- Protective covers on flange faces
- Bundled with steel strips
- Wooden crates or pallets for export shipment
Delivery
- Trade Terms: FOB, CIF, CFR
- Fast delivery for standard sizes
- Professional global logistics support
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