Home > Stainless Steel > Stainless Steel 321H Pipe
Stainless Steel 321H Pipes are corrosion-resistant piping solutions custom-built from alloy 321H, featuring elevated carbon content for enhanced high-temperature strength. Widely used in industries such as petrochemicals and refineries, these pipes excel in resisting corrosion and maintaining structural integrity in demanding environments prone to high temperatures and corrosive elements. With excellent durability and flexibility in fabrication, stainless steel 321H pipes offer reliable performance in various applications requiring robust corrosion resistance and elevated temperature stability.
Dimensions | : | ASTM, ASME and API |
---|---|---|
Standard | : | ASTM A240 / ASME SA240 |
Width | : | 1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2500mm, 3000mm, 3500mm, |
Thickness | : | 4mm-100mm |
Length | : | 2000mm, 2440mm, 3000mm, 5800mm, 6000mm, |
Form | : | Coils, Foils, Rolls, Plain Sheet, Shim Sheet, Perforated Sheet, Chequered Plate, Strip, Flats, Blank (Circle), Ring (Flange) etc. |
Surface Finish | : | 2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, chequered, embossed, hairline, sand blast, Brush, etching, Hot rolled plate (HR), Cold rolled sheet (CR), SATIN (Met with Plastic Coated) etc |
Hardness | : | Soft, Hard, Half Hard, Quarter Hard, Spring Hard etc |
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Ti |
SS 321 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17 – 19 | – | 9 – 12 | 5(C+N) – 0.70 max |
SS 321H | 0.04 – 0.10 | 2.0 max | 1.00 max | 0.045 max | 0.030 max | 17 – 19 | – | 9 – 12 | 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 offer These Stainless Steel 321H Pipe as per DIN, ISO, JIS or ANSI Standard.
Stainless Steel 321H Pipe applications are as diverse as the industries they serve driven primarily by the aerospace, railway, construction and automotive industries with petrochemical, nuclear, medical, Oil & Gas, Chemical, Pharmaceutical, Food & Beverage, Nuclear, Thermal Power plants, Paper and Pulp, marine and mining, etc.
Stainless Steel 321H pipes are highly resistant to rust and corrosion due to their chromium and nickel content. However, under certain extreme conditions such as prolonged exposure to high temperatures or highly corrosive environments, there may be a risk of localized corrosion, such as pitting or crevice corrosion. Proper maintenance and avoidance of harsh conditions can help minimize the risk of rusting, ensuring the longevity and performance of stainless steel 321H pipes.
To maintain a stainless steel 321H pipe, regularly clean it with mild soap and water to remove surface contaminants and debris. Avoid harsh or abrasive cleaners that could damage the protective oxide layer. Inspect the pipe periodically for signs of corrosion or damage, especially in high-temperature or corrosive environments. Address any issues promptly to prevent further deterioration. Additionally, consider applying a protective coating or passivation treatment to enhance corrosion resistance. Proper handling and storage can also help maintain the integrity of the pipe.
Yes, stainless steel 321H pipes can be welded using commonly used welding techniques such as TIG (tungsten inert gas) welding, MIG (metal inert gas) welding, and SMAW (shielded metal arc welding). However, it’s important to use low heat input and suitable filler materials to prevent sensitization and preserve corrosion resistance. Preheating and post-weld heat treatment may be necessary to minimize the risk of intergranular corrosion and ensure the integrity of the weld joint. Overall, proper welding procedures and precautions should be followed to achieve strong and durable welds in stainless steel 321H pipes.
Stainless steel 321H pipes are sized based on their nominal pipe size (NPS), which refers to the approximate inside diameter. Common sizes range from 1/8 inch to 36 inches in diameter. Additionally, stainless steel pipes are typically specified by their schedule, which indicates the wall thickness. Standard schedules include SCH 5, SCH 10, SCH 40, and SCH 80, among others. The selection of pipe size depends on factors such as flow rate, pressure requirements, and compatibility with existing piping systems.
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