Chanchai Stainless is a top-notch manufacturer and supplier based in Bangkok, Thailand, specializing in high-quality Stainless Steel 321H Flanges that are built to last and perform exceptionally well at high temperatures. These flanges are stabilized with titanium and have a higher carbon content compared to standard grade 321, which gives them remarkable resistance to intergranular corrosion and improved creep strength. They’re a go-to choice for industries that need reliable performance under continuous high-temperature conditions, ensuring solid connections in piping systems. With cutting-edge manufacturing techniques and rigorous quality checks, Chanchai Stainless delivers 321H flanges that comply with global standards, catering to the petrochemical, power generation, chemical processing, and food sectors with durable stainless steel solutions.
Stainless Steel 321H Flanges are made up of 17–19% chromium, 9–12% nickel, and titanium stabilization, along with a higher carbon content than the standard 321 grade. This unique blend helps prevent carbide precipitation during welding and boosts strength in high-temperature applications. On the mechanical side, they boast a tensile strength of about 515 MPa and a yield strength of 205 MPa, along with impressive creep and stress-rupture resistance. Their hardness, toughness, and thermal stability hold up well even in harsh operating conditions. Thanks to their excellent oxidation and corrosion resistance, Stainless Steel 321H Flanges are perfect for creating secure, long-lasting piping connections in demanding industrial settings.
| Specifications | ASTM A182 / ASME SA182 |
| Size | 1/8″ NB TO 48″ NB |
| Standards | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc. |
| Class / Pressure | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc. |
| Standard | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc. |
| Grades | S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61 |
| Grade | C | Mn | Si | P | S | Cr | N | Ni | Ti | 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 % |
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We offers the best quality Stainless Steel 321H Flanges Chanchai Stainless,which has undergone intense testing to produce top quality and performance. The flange is thoroughly tested for meeting international standards and specifications. Products supplied by us are certified by recognized authorities for traceability and reliability in each batch. With modern technology and strict quality control, we ensure durability, corrosion resistance, and good mechanical properties. Chanchai Stainless stands by the delivery of flanges with the highest level of industry standards in functionality and safety.
Stainless Steel 321H Threaded Flanges are available in sizes ranging from 1/2″ to 24″ and are designed for easy assembly without welding. They offer good resistance to oxidation and corrosion, making them suitable for various industrial applications.
SS 321H Socket Weld Flanges, ranging from 1/2″ to 24″ in size, are designed to fit inside a pipe for strong, reliable connections. They provide excellent resistance to high-temperature environments and corrosive substances.
Stainless Steel 321H Lap Joint Flanges are available in sizes from 1/2″ to 24″ and are used with a backing flange to allow for easy alignment and assembly. They offer high resistance to oxidation and corrosive elements, ideal for applications with frequent disassembly.
Stainless Steel 321H Flanges find their place in various industries that require dependable, heat-resistant, and corrosion-resistant piping connections. You’ll often see them used in heat exchangers, boilers, superheaters, condensers, and pressure vessels that operate at high temperatures. In the petrochemical and refinery sectors, they play a crucial role in reactors, furnace components, and catalytic systems. The power generation industry relies on them for steam lines and turbine applications.
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