Stainless Steel 321 Flange

Manufacturer of ASTM A182 F321 Weld Neck Flanges in India

Stainless steel has become the go-to material for industrial applications due to its durability, corrosion resistance, and excellent welding properties. One type of stainless steel that has recently gained a lot of popularity is ASTM A182 F321 . This grade of stainless steel is often used as a base material to manufacture weld neck flanges, connecting devices that join two pipes or valves, and serve as a leak-proof joint.


Weld neck flanges are available in different types, and each type serves a specific purpose and has its unique design. The flanges come in various pressure ratings, sizes, and material grades, and the right type must be used depending on the application. The most common types of weld neck flanges are raised face (RF), flat face (FF), and ring joint (RTJ). RF flanges are the most common type, with raised faces on the mating surfaces, while FF flanges are flat on the adjoining surfaces. RTJ flanges have a spoke-shaped groove to accommodate a metal ring joint, which provides additional support for the flange connection.

ASTM A182 Stainless Steel F321 Weld Neck Flanges are widely used in numerous industries, including chemical processing, petrochemicals, oil and gas, power generation, and pharmaceuticals. These flanges are used in piping systems that handle high-pressure fluids or gasses, ensuring secure and leak-proof connections. Weld neck flanges are especially handy in high-temperature and high-pressure applications, as the stress on the flange connection is distributed over a larger surface area, resulting in a stronger connection.
ASTM A182 Stainless Steel F321 Weld Neck Flanges offer several benefits over other flanges. First, their design ensures a seamless connection between two pipes or valves, minimizing the chances of leaks and other defects. Secondly, due to their high strength, they can withstand high-pressure fluids, ensuring the system's safety. Weld neck flanges also have excellent durability and corrosion resistance, making them ideal for use in harsh and corrosive environments. Finally, ASTM A182 stainless steel F321 weld neck flanges can be easily welded to the pipes or valves, making installing and maintaining the entire system much easier.


ASTM A182 stainless steel F321 weld neck flanges are vital components used in numerous applications in various industries thanks to their durable construction, high strength, and corrosion resistance. The right flange type must be used depending on the application, and the selection should always consider the pressure and temperature parameters of the system.


Specification of Stainless Steel F321 Weld Neck Flanges

Spec bag

Specifications: ASTM A182 / ASME SA182

Dimensions: ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.

Standard: ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.

Size:1/4" - 48"

Class/Pressure: 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.

Flange Face Type: flat face (FF), Raised Face (RF), Ring Type Joint (RTJ)

Types of Stainless Steel Weld Neck Flanges

Stainless Steel F321 WNRF Flanges

ASTM A182 Stainless Steel F321 WNRF Flanges

Stainless Steel F321 WNRTJ Flanges

ASTM A182 SS F321 WNRTJ Flanges

Equivalent Grades for Stainless Steel F321 Weld Neck Flanges

STANDARD WERKSTOFF NR. UNS JIS EN
SS 321 1.4541 S32100 SUS 321 X6CrNiTi18-10

Stainless Steel 321 Weld Neck Flanges Chemical Composition

Grade C Mn P S Si Cr Ni Ti
SS 321 0.08 2.0 0.045 0.030 1.00 17.0-19.0 9.0-12.0 5(C+N) – 0.70 max

Mechanical Properties of Stainless Steel F321 WNRF Flanges

Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
8.0 g/cm3 1457 °C (2650 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 35 %

ASTM A182 SS F321 Weld Neck Flanges are available in a range of sizes, typically ranging from 1/2 inch to 24 inches or even larger. The specific size availability may vary depending on the manufacturer & supplier.

Yes, ASTM A182 SS F321 Weld Neck Flanges are specifically designed to withstand high-temperature environments. They have a maximum service temperature of approximately 870°C (1600°F) making them suitable for applications where elevated temperatures are encountered such as in heat exchangers, boilers & furnace components.

Absolutely. ASTM A182 SS F321 Weld Neck Flanges offer excellent resistance to a wide range of corrosive environments, including organic acids, inorganic acids & chloride-containing solutions.