Kyaw Stainless is a well-respected manufacturer and supplier located in Naypyidaw, Myanmar, known for its top-notch Stainless Steel 321H Flanges. With state-of-the-art production facilities and a strong dedication to quality, the company provides flanges that not only meet international standards but also cater to a variety of industrial needs. Their Stainless Steel 321H Flanges are designed for exceptional strength, durability, and corrosion resistance, making them perfect for high-temperature and high-stress applications. Kyaw Stainless prides itself on precision in design, dimensional accuracy, and consistent quality, serving industries like petrochemical, power generation, and food processing with reliable, long-lasting products.
These Stainless Steel 321H Flanges are made from a blend of chromium, nickel, and titanium, with a bit of added carbon to boost high-temperature strength. This austenitic stainless steel is known for its outstanding oxidation and corrosion resistance, even in continuous service at temperatures up to 900°C. It boasts high tensile and yield strength, excellent creep resistance, and good toughness, whether in high heat or sub-zero conditions. These mechanical properties make it a great fit for environments where thermal stability and durability are essential, ensuring dependable performance in challenging 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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Stainless Steel 321H Flanges find extensive application in power generation, petrochemical, aerospace, and marine engineering industries. Their heat resistance and oxidation properties qualify them for use in heat exchangers, boiler fittings, exhaust systems, and furnace equipment. Their applications extend to pressure vessels, refinery fittings, and chemical plants where extreme heat and hostile chemicals must be resisted. They are a better option for the critical piping services used in high-temperature industrial processes due to their excellent weldability, endurance, and resistance to corrosion.
Designed for easy installation and alignment, with sizes ranging from 1/2″ to 24″ in diameter. They offer excellent resistance to high-temperature oxidation and corrosion. Ideal for applications where moderate strength and corrosion resistance are required.
Available in sizes from 1/2″ to 24″ and feature a long tapered hub for superior strength and leak-proof performance. They are highly resistant to oxidation and corrosion, making them suitable for high-pressure environments.
Sizes from 1/2″ to 24″ and are used to seal the end of a piping system. They provide excellent resistance to high temperatures and corrosive environments, ensuring a secure and leak-tight closure.
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.
Designed to fit inside a pipe for strong, reliable connections. They provide excellent resistance to high-temperature environments and corrosive substances.
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, including chemical processing, oil and gas, power generation, and pharmaceuticals. They are particularly suited for high-temperature applications like heat exchangers, boilers, pressure vessels, and exhaust systems. Thanks to their excellent resistance to oxidation and intergranular corrosion, these flanges promise a long service life and lower maintenance needs. Moreover, their mechanical strength and stability make them a go-to choice for connecting pipes and valves in high-pressure and corrosive environments, ensuring leak-proof and efficient fluid flow across a range of industrial operations.







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