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Bulk stock available of TP321 H stainless steel pipe, Famous SS 321h EFW pipe dealer, 321 stainless
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Table of Content
We at Preston Pipes & Alloys are a trusted stainless steel 321 pipe supplier. Commonly known as TP321 or SS 321, this pipe is a titanium stabilised austenitic stainless steel pipe consisting of 17-19% chromium, 9-12% nickel, around 2% manganese, and traces of other elements. It has good corrosion and oxidation resistance, high thermal stability, and other meaningful features. 321 pipe’s titanium-stabilisation helps prevent carbide precipitation and resists intergranular corrosion. Due to these properties, it is suitable for aerospace, chemical processing, heat exchangers, and refineries. The 321H pipe is a similar variant of 321 with a higher amount of carbon, which gives it better strength at elevated temperatures.
We offer SS UNS S32109 Pipes in a wide range of sizes, types, and finishes, with outer diameters from 6.00 mm to 914.4 mm, thicknesses ranging from 0.3 mm to 50 mm, and sizes up to 24" NB. The pipes comply with ASTM A213, A249, A269 and ASME SA213, SA249, SA269 standards. We offer seamless, ERW, welded, fabricated, or CDW types. Forms include round, square, rectangular, coiled, "U" shaped, pancake coils, and hydraulic tubes. We provide pipes in single, double, or custom lengths with plain, bevelled, or threaded ends. Our SS 321 pipe for regular use and stainless steel 321H pipe for high-stress systems ensure reliability.
Inconel 601 provides dependable service when exposed to heat, gas, and chemical media. It delivers reliable protection, longer component life, and less frequent maintenance.
- Improved Lifespan in Heat Exposure: The alloy withstands constant heating inside furnaces and reactors. Its resistance to breakdown reduces the need for frequent replacement. Stable performance helps manufacturers maintain smooth operation in high-temperature systems without shutdowns caused by part failure.
- Enhanced Corrosion Protection: Inconel 601 performs reliably in environments with carburizing or sulfur-bearing conditions. Equipment maintains cleaner internal surfaces and experiences reduced metal decay, extending service life and minimizing unexpected shutdowns due to erosion or chemical damage.
- Easy Fabrication and Forming: The alloy can be formed into sheet metal components, large plates, or thin coils. It supports machining and welding to meet custom furnace or thermal system designs, allowing engineers to use a single alloy across multiple system components.
- Low Maintenance Requirement: Stable oxidation film formation minimizes surface cleaning and protects against scale buildup. The material retains mechanical integrity over long operating periods, helping reduce repair frequency and keep operational costs low.
| ASTM / ASME Specification | ASTM A312 / ASTM SA 312 |
| Dimensional Standards | ANSI/ASME B36.19M, ANSI/ASME B36.10M |
| Different Types and Shapes | Hydraulic, Square, Hex, Honed, Round, Rectangle |
| Most Common types | 100% X Ray Welded, Seamless, CDW, Fabricated, ERW, Welded |
| Pipe End Types | Plain One End, Plain Both Ends, Bevel small end, Treaded On End, Beveled end, Bevel one end, Bevel large end, Beveled One End, Treaded Both Ends, Bevel both ends |
| Technical Conditions of The Pipe | Cold Drawn, Bright Annealed, Annealed and Pickled, Polished |
| Mechanical Surface Finishing | 2B, No.4, No.1, No.8 Mirror Finish or custom Finish as per customer Requirements |
| Wall Wall Thickness Schedule Chart | SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS |
| Other Services we provide |
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| Marking available for TP321 Pipes |
Marked Pipe Sample: ANSI B36.19 ASTM A312 TP321 12" NB SCH 40S SEAMLESS HEAT NO. XXXX |
Stainless Steel 321 Seamless Pipe
Stainless Steel 321 Welded Pipe
Stainless Steel 321 ERW Pipe
A312 TP321 EFW Pipe
Contact Us for Bulk ordering ASTM A312 TP321 Seamless Pipes!
| Density | 8.0 g/cm3 |
| Melting Point | 1454 °C (2650 °F) |
| Tensile Strength | Psi - 75000 , MPa - 515 |
| Yield Strength (0.2%Offset) | Psi - 30000 , MPa - 205 |
| Elongation | 35 % |
Stainless Steel 321/321H Pipes Composition Chart
| Ni | 9 - 12 |
| Cr | 17 - 19 |
| C | 0.08 max |
| N | 0.10 max |
| Fe | Balance |
| Mn | 2 max |
| Si | 0.75 max |
| S | 0.03 max |
| P | 0.045 max |
| Ti | 5xC min 0.60% max |
Stainless Steel TP 321 / 321H pipes are widely used across industries that operate under high temperatures, corrosive chemicals, and demanding service conditions. Their titanium-stabilized composition ensures reliable performance in critical environments.
- Automotive and Aerospace: Due to high thermal stability and resistance to oxidation, SS 321 / 321H pipes are used in exhaust manifolds, exhaust ducts, catalytic converters, turbocharger systems, jet engine components, and aircraft tubing.
- Chemical Processing: These pipes are widely used in chemical plants for piping systems, reaction vessels, storage tanks, heat exchangers, valves, and fittings where exposure to aggressive chemicals and elevated temperatures is common.
- Refinery and Petrochemical: In refinery and petrochemical applications, TP 321 pipes are found in polythionic acid service, thermal transfer assemblies, exhaust stacks and manifolds, and various refinery machinery handling corrosive media.
- Power Generation: TP 321 / 321H pipes are extensively applied in boilers, heat exchangers, nuclear power plants, and process piping systems that require long-term strength and oxidation resistance at high temperatures.
- Food Processing: In the food processing industry, these pipes are used in pumps, reaction vessels, piping systems, ovens, fittings, valves, and dairy and beverage processing lines. They are also suitable for transporting fluids such as milk, juices, and other consumable liquids.
All Stainless Steel 321 / 321H pipes undergo strict quality checks to ensure consistent performance and reliability. Tests include flattening, flaring, hardness, pitting, and intergranular corrosion examinations. Surface finish, end finish, and dimensional accuracy are thoroughly inspected before packing. Pipes are shipped in secure bundles, wooden boxes, or as per customer requirements. As a trusted Stainless Steel 321 pipe stockist, we ensure every piece meets exact project standards. Contact us today to get the latest price of Stainless Steel 321 / 321H pipes.
Titanium-stabilised Stainless Steel 321 pipes offer excellent resistance to intergranular corrosion, strong oxidation resistance, and high creep and stress-rupture strength. These properties make them suitable for elevated-temperature service.
SS 321 is stabilised with titanium, which prevents chromium carbide precipitation during high-temperature exposure. This stabilisation protects the material from intergranular corrosion and improves long-term reliability.
Compared to SS 304 and SS 316, SS 321 pipes provide better thermal stability and superior resistance to intergranular corrosion, especially in continuous or cyclic high-temperature operating conditions.
SS 321 pipes are commonly used in exhaust systems, chemical reactors, industrial piping, boilers, and heat exchangers where high temperatures and corrosion resistance are required.
SS 321 pipe suppliers should comply with ASTM A312 and ASTM A213 standards. These ensure correct chemical composition, mechanical properties, and dimensional accuracy.