A seamless stainless steel pipe is a metal tube manufactured without a welded seam, formed by piercing a solid steel bar or ingot to create a hollow shell, which is then further shaped into the final pipe form.
Instant InquiryStainless Steel Pipes and Tubes are critical components for fluid transport, structural support, and heat exchange in demanding industrial applications. Compliant with ASTM A312 for seamless and welded austenitic pipes, ASTM A213 for boiler and heat-exchanger tubes, and ASTM A269 for general service tubing, these products are engineered for reliability. Grades like TP304/304L offer cost-effective corrosion resistance for general use, while TP316/316L provides enhanced pitting resistance in chloride-rich environments, such as marine or chemical processing. Seamless Stainless Pipes, produced via extrusion or rotary piercing, ensure uniformity for high-pressure applications up to 4500 psi, while Welded Stainless Tubes, formed from strip welding, offer cost-efficiency for larger diameters.
These Stainless Steel Tubes deliver exceptional mechanical properties, with tensile strengths ≥515 MPa, yield strengths ≥205 MPa, and elongations up to 40%, enabling bending, flanging, and welding. Their chromium content (18-20%) forms a self-healing oxide layer for corrosion resistance, enhanced by nickel (8-14%) for ductility and molybdenum (in 316) for pitting resistance. Available in sizes from 1/8" to 36" (DN6 to DN900) and wall thicknesses from 0.010" to 2" (SCH 5S to XXH), they suit diverse applications, from oil and gas pipelines to food-grade systems. Surface finishes like polished or electropolished meet sanitary standards for pharmaceuticals, while heat treatments ensure low thermal expansion for cryogenic service down to -196°C.
The Corrosion Resistant Stainless Tube excels in harsh environments, with NACE MR0175 compliance for sour service in oil and gas. Seamless variants are ideal for high-pressure boiler tubes under ASME SA213, while welded tubes serve low-to-medium pressure systems like HVAC or architectural structures. Benefits include a lifespan up to 50 years and 30-40% lower lifecycle costs compared to carbon steel. Custom options, such as cut-to-length or beveled ends, support project-specific needs in offshore platforms or medical gas lines.
Compared to carbon steel, Stainless Steel Pipes offer 2-3 times better corrosion resistance, eliminating frequent maintenance like painting in acidic or seawater conditions. Unlike plastic pipes, they handle extreme temperatures (up to 650°C) and pressures, ensuring safety in industrial flows. Long-tail keywords like “seamless stainless steel pipe for chemical processing” or “welded stainless tube for sanitary systems” align with API 5L or NSF 61 standards. Rigorous testing—tensile, flattening, and hydrostatic—ensures compliance, with duplex grades like 2205 available for enhanced strength in sour service.
Addressing challenges like erosion in high-velocity flows and biofouling in water systems, these Stainless Steel Tubes incorporate alloy enhancements like nitrogen for improved pitting resistance. Their 100% recyclability aligns with eco-friendly regulations, making them a sustainable choice. Whether conveying crude oil in refineries or potable water in municipal systems, Stainless Steel Pipes and Tubes deliver unmatched durability, versatility, and performance for global industrial demands.
Reduced surface area minimizes painting, fireproofing, and labor costs.
High weight-to-strength ratio ensures durability and reliability in use.
Used in construction, structural engineering, and various industrial projects.
We stock a wide range of schedules to ensure the right choice for every application, from low-pressure systems to the most demanding industrial conditions.
Lightweight and cost-effective, ideal for low-pressure applications such as water distribution, fire protection systems, and HVAC ductwork.
Stronger than Schedule 10, commonly used in residential plumbing, industrial cooling, and chemical applications.
Designed for high-pressure environments, offering improved durability for industrial processes and oil & gas applications.
Exceptional strength for extreme pressure and temperature conditions. Ideal for power plants, petrochemical industries, and steam lines.
The thickest and most robust pipe schedule, built for the most demanding industrial conditions like deep well drilling and high-pressure hydraulics.
We offer both welded and seamless stainless steel pipes in a range of configurations to meet your specific needs.
Welded pipes are manufactured by bending a sheet of steel into a tube and welding the seam.
Seamless pipes are created by heating a solid billet and piercing it with a mandrel to form a tube.
| Aspect | Seamless Pipes | Welded Pipes |
|---|---|---|
| Strength | Higher strength, no weld seam | Lower strength due to weld seam (but improving with technology) |
| Cost | Generally more expensive | More cost-effective to manufacture |
| Usage | High-pressure applications | Low to medium pressure applications |
| Availability | Smaller sizes, limited larger sizes | Wide range of sizes and lengths available |
We stock stainless steels in a multitude of shapes and sizes.
We support our stainless steel stock with a wide range of shapes and sizes to suit your engineering applications. We hold thirteen different types of shapes to support the grades of material we stock, including bars, sheets and plates. Our stainless steel shapes are available in various grades, including 304, 304L, 316, and 316L, each offering unique properties to meet specific application requirements. Whether you need flat bars for structural support, round bars for machining, or sheets and plates for fabrication, we have the right stainless steel shape for your project.
Stainless Carbon Steel Composite Pipe
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Material-Specific Erosion Shields
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| Grade | C (% max) | Mn (% max) | Si (% max) | P (% max) | S (% max) | Cr (%) | Ni (%) | Mo (%) | N (% max) |
|---|---|---|---|---|---|---|---|---|---|
| 304 | 0.08 | 2.00 | 1.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-11.0 | - | 0.10 |
| 304L | 0.03 | 2.00 | 1.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-12.0 | - | 0.10 |
| 316 | 0.08 | 2.00 | 1.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | 0.10 |
| 316L | 0.03 | 2.00 | 1.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | 0.10 |
The low carbon content in 304L and 316L enhances weldability, while molybdenum in 316 and 316L improves resistance to pitting and crevice corrosion, making Stainless ideal for harsh environments.
| Grade | Tensile Strength (min, MPa) | Yield Strength (min, MPa) | Elongation (min, %) | Hardness (max, HB) | Hardness (max, HRB) |
|---|---|---|---|---|---|
| 304 | 515 | 205 | 40 | 201 | 92 |
| 304L | 485 | 170 | 40 | 201 | 92 |
| 316 | 515 | 205 | 40 | 217 | 95 |
| 316L | 485 | 170 | 40 | 217 | 95 |
These mechanical properties make Stainless suitable for applications requiring high strength and corrosion resistance, such as architectural structures, marine environments, and chemical processing.
In order to solve the cumbersome and difficult to remember stainless steel grades, improve the practicability of the brand representation, and the contrast with the international standard grades, China has formulated the "Universal Code System for Steel and Alloy Grades", such as 06Cr19Ni10, corresponding to 304. Different grades of stainless steel have different ingredients, but they all have a national standard. The standards of each country are also different.
| No | China (GB) | Japan (JIS) | American | Korea (KS) | EU (BS EN) | India (IS) | Australia (AS) | Taiwan (CNS) | ||
|---|---|---|---|---|---|---|---|---|---|---|
| Old | New (07.10) | SUS | ASTM | UNS | STS | EN | IS | AS | CNS | |
| Austenitic Stainless Steel | ||||||||||
| 1 | 1Cr17Mn6Ni5N | 12Cr17Mn6Ni5N | SUS201 | 201 | S20100 | STS201 | 1.4372 | 10Cr17Mn6Ni4N20 | 201-2 | 201 |
| 2 | 1Cr18Mn8Ni5N | 12Cr18Mn9Ni5N | SUS202 | 202 | S20200 | STS202 | 1.4373 | — | — | 202 |
| 3 | 1Cr17Ni7 | 12Cr17Ni7 | SUS301 | 301 | S30100 | STS301 | 1.4319 | 10Cr17Ni7 | 301 | 301 |
| 4 | 0Cr18Ni9 | 06Cr19Ni10 | SUS304 | 304 | S30400 | STS304 | 1.4301 | 07Cr18Ni9 | 304 | 304 |
| 5 | 00Cr19Ni10 | 022Cr19Ni10 | SUS304L | 304L | S30403 | STS304L | 1.4306 | 02Cr18Ni11 | 304L | 304L |
| 6 | 0Cr19Ni9N | 06Cr19Ni10N | SUS304N1 | 304N | S30451 | STS304N1 | 1.4315 | — | 304N1 | 304N1 |
| 7 | 0Cr19Ni10NbN | 06Cr19Ni9NbN | SUS304N2 | XM21 | S30452 | STS304N2 | — | — | 304N2 | 304N2 |
| 8 | 00Cr18Ni10N | 022Cr19Ni10N | SUS304LN | 304LN | S30453 | STS304LN | — | — | 304LN | 304LN |
| 9 | 1Cr18Ni12 | 10Cr18Ni12 | SUS305 | 305 | S30500 | STS305 | 1.4303 | — | 305 | 305 |
| 10 | 0Cr23Ni13 | 06Cr23Ni13 | SUS309S | 309S | S30908 | STS309S | 1.4833 | — | 309S | 309S |
| 11 | 0Cr25Ni20 | 06Cr25Ni20 | SUS310S | 310S | S31008 | STS310S | 1.4845 | — | 310S | 310S |
| 12 | 0Cr17Ni12Mo2 | 06Cr17Ni12Mo2 | SUS316 | 316 | S31600 | STS316 | 1.4401 | 04Cr17Ni12Mo2 | 316 | 316 |
| 13 | 0Cr18Ni12Mo3Ti | 06Cr17Ni12Mo2Ti | SUS316Ti | 316Ti | S31635 | — | 1.4571 | 04Cr17Ni12MoTi20 | 316Ti | 316Ti |
| 14 | 00Cr17Ni14Mo2 | 022Cr17Ni12Mo2 | SUS316L | 316L | S31603 | STS316L | 1.4404 | 02Cr17Ni12Mo2 | 316L | 316L |
| 15 | 0Cr17Ni12Mo2N | 06Cr17Ni12Mo2N | SUS316N | 316N | S31651 | STS316N | — | — | 316N | 316N |
| 16 | 00Cr17Ni13Mo2N | 022Cr17Ni13Mo2N | SUS316LN | 316LN | S31653 | STS316LN | 1.4429 | — | 316LN | 316LN |
| 17 | 0Cr18Ni12Mo2Cu2 | 06Cr18Ni12Mo2Cu2 | SUS316J1 | — | — | STS316J1 | — | — | 316J1 | 316J1 |
| 18 | 00Cr18Ni14Mo2Cu2 | 022Cr18Ni14Mo2Cu2 | SUS316J1L | — | — | STS316J1L | — | — | — | 316J1L |
| 19 | 0Cr19Ni13Mo3 | 06Cr19Ni13Mo3 | SUS317 | 317 | S31700 | STS317 | — | — | 317 | 317 |
| 20 | 00Cr19Ni13Mo3 | 022Cr19Ni13Mo3 | SUS317L | 317L | S31703 | STS317L | 1.4438 | — | 317L | 317L |
| 21 | 0Cr18Ni10Ti | 06Cr18Ni11Ti | SUS321 | 321 | S32100 | STS321 | 1.4541 | 04Cr18Ni10Ti20 | 321 | 321 |
| 22 | 0Cr18Ni11Nb | 06Cr18Ni11Nb | SUS347 | 347 | S34700 | STS347 | 1.4550 | 04Cr18Ni10Nb40 | 347 | 347 |
| Austenitic-Ferritic Stainless Steel (Duplex) | ||||||||||
| 23 | 0Cr26Ni5Mo2 | — | SUS329J1 | 329 | S32900 | STS329J1 | 1.4477 | — | 329J1 | 329J1 |
| 24 | 00Cr18Ni5Mo3Si2 | 022Cr19Ni5Mo3Si2N | SUS329J3L | — | S31803 | STS329J3L | 1.4462 | — | 329J3L | 329J3L |
| Ferritic Stainless Steel | ||||||||||
| 25 | 0Cr13Al | 06Cr13Al | SUS405 | 405 | S40500 | STS405 | 1.4002 | 04Cr13 | 405 | 405 |
| 26 | — | 022Cr11Ti | SUH409 | 409 | S40900 | STS409 | 1.4512 | — | 409L | 409L |
| 27 | 00Cr12 | 022Cr12 | SUS410L | — | — | STS410L | — | — | 410L | 410L |
| 28 | 1Cr17 | 10Cr17 | SUS430 | 430 | S43000 | STS430 | 1.4016 | 05Cr17 | 430 | 430 |
| 29 | 1Cr17Mo | 10Cr17Mo | SUS434 | 434 | S43400 | STS434 | 1.4113 | — | 434 | 434 |
| 30 | — | 022Cr18NbTi | — | — | S43940 | — | 1.4509 | — | 439 | 439 |
| 31 | 00Cr18Mo2 | 019Cr19Mo2NbTi | SUS444 | 444 | S44400 | STS444 | 1.4521 | — | 444 | 444 |
| Martensitic Stainless Steel | ||||||||||
| 32 | 1Cr12 | 12Cr12 | SUS403 | 403 | S40300 | STS403 | — | — | 403 | 403 |
| 33 | 1Cr13 | 12Cr13 | SUS410 | 410 | S41000 | STS410 | 1.4006 | 12Cr13 | 410 | 410 |
| 34 | 2Cr13 | 20Cr13 | SUS420J1 | 420 | S42000 | STS420J1 | 1.4021 | 20Cr13 | 420 | 420J1 |
| 35 | 3Cr13 | 30Cr13 | SUS420J2 | — | — | STS420J2 | 1.4028 | 30Cr13 | 420J2 | 420J2 |
| 36 | 7Cr17 | 68Cr17 | SUS440A | 440A | S44002 | STS440A | — | — | 440A | 440A |
Stainless steel pipes for oil cracking
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Super Austenitic Stainless Steel
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Stainless Steel Composite Pipe
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S32750 ASTM A790 Stainless Pipe
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Heat resistant stainless steel pipe
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Ferritic stainless steel tubes
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