In a fast-evolving industry, Prime Steel Industries remains adaptive, ensuring that its products and services align with the dynamic demands of the market.
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At Prime Steel, we take immense pride in being at the forefront as a leading manufacturer and supplier of stainless steel 321/321H flanges. Our commitment to excellence and unwavering dedication to quality set us apart in the industry, making us the preferred choice for businesses seeking top-tier stainless steel solutions. Prime Steel caters to a diverse range of industries, offering a comprehensive selection of stainless steel 321/321H flanges suitable for various applications.
Type: Flanged Pipe Fittings
Material: Stainless Steel
ASTM: A182 /SA182
Grade: 321/ 321h
UNS: S32100/ S32109
WERKSTOFF: 1.4541/ 1.4878
ASTM A182 F321 / ASME SA182 F321h
15mm ( 1/2" NPS ) up to 600mm ( 24" NPS ), For 2500# in sizes from NPS 1/2 to NPS 12
FF—Flat Face, RF—Raised Face, FM—Female Face, M—Male Face, T—Tongue Face, G—Groove Face, RJ—Ring Joint.
ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN
150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64.
Chemical Processing, Oil and Gas Industry, Petrochemical Industry
Stainless Steel 321 and 321H flanges are components used in piping systems to connect pipes, valves, pumps, and other equipment. These flanges are specifically made from stainless steel alloy grades 321 and 321H, which are variations of the basic 18-8 austenitic stainless steel (Chromium-Nickel).
Stainless Steel 321 (UNS S32100) grade is a stabilized austenitic stainless steel containing titanium. The addition of titanium minimizes the risk of intergranular corrosion when the material is exposed to high temperatures. Stainless Steel 321 is particularly suitable for applications where temperatures range between 800 and 1500°F (427 to 816°C).
Stainless Steel 321H (UNS S32109) is a higher carbon version of 321 stainless steel, designed for elevated temperature applications. The "H" in 321H stands for "High Carbon," and this variation provides improved high-temperature strength and resistance to sensitization during welding.
These flanges are widely used in industries such as chemical processing, petrochemical, pharmaceuticals, and aerospace, where resistance to corrosion and high temperatures is essential. The stability and durability of stainless steel 321/321H make these flanges suitable for demanding applications in challenging environments.
Check ANSI/ASME B16.5, B 16.47 Series A & B, B16.48 Flange Dimensions Download
| STANDARD | WERKSTOFF NR. | UNS | JIS | EN |
|---|---|---|---|---|
| SS 321 | 1.4541 | S32100 | SUS 321 | X6CrNiTi18-10 |
| SS 321H | 1.4878 | S32109 | SUS 321H | X12CrNiTi18-9 |
| Grade | C | Mn | Si | P | S | Cr | N | Ni | Ti |
|---|---|---|---|---|---|---|---|---|---|
| SS 321 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 0.10 max | 9.00 – 12.00 | 5(C+N) – 0.70 max |
| SS 321H | 0.04 – 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 0.10 max | 9.00 – 12.00 | 4(C+N) – 0.70 max |
| 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 % |
Carbon Content:
High-Temperature Strength:
Sensitization During Welding:
Applications:
These flanges are components in piping systems used to connect pipes, valves, and other equipment. They play a crucial role in facilitating assembly, disassembly, and maintenance of the piping system.
Yes, these flanges can be welded. However, precautions should be taken to avoid sensitization during welding, especially for Stainless Steel 321H. Post-weld heat treatment may be recommended to restore corrosion resistance.
Flanges are manufactured according to industry standards such as ASTM A182 for forged flanges and ASTM A240 for plate flanges. Specific flange dimensions and pressure ratings are determined by standards like ASME B16.5 and ASME B16.47.
