China Stainless Steel
stainless steel
seamless pipe & tube
TeCarve is a stainless steel seamless pipe and tube manufacturer supplying ASTM A312 pipe and related tube specifications for industrial procurement. Available grades include 304, 304L, 316, 316L, 321, 310S, 317L, 904L and Duplex 2205, with outer diameters from 6 mm to 1600 mm and wall thicknesses from 0.5 mm to 100 mm. Customized dimensions, lengths and surface finishes can be specified for each order.
For non-standard dimensions, lengths, and inspection requirements, explore our custom stainless steel tube fabrication service.
Specifications
Available Sizes by Standard
Markets: N. America, S. America, Middle East EPC, oil & gas (Pipe · NPS/Sch)
| NPS | Sch | OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|---|---|
| 1/8" | 10S | 10.3 | 1.24 | ±0.40mm (±3.9%) | -0.15mm (-12.5%) / +Not Specified |
| 1/2" | 10S | 21.3 | 2.11 | ±0.40mm (±1.9%) | -0.26mm (-12.5%) / +Not Specified |
| 3/4" | 10S | 26.7 | 2.11 | ±0.40mm (±1.5%) | -0.26mm (-12.5%) / +Not Specified |
| 1" | 10S | 33.4 | 2.77 | ±0.40mm (±1.2%) | -0.35mm (-12.5%) / +Not Specified |
| 1" | 40S | 33.4 | 3.38 | ±0.40mm (±1.2%) | -0.42mm (-12.5%) / +Not Specified |
| 2" | 10S | 60.3 | 2.77 | ±0.45mm (±0.75%) | -0.35mm (-12.5%) / +Not Specified |
| 2" | 40S | 60.3 | 3.91 | ±0.45mm (±0.75%) | -0.49mm (-12.5%) / +Not Specified |
| 4" | 10S | 114.3 | 3.05 | ±0.86mm (±0.75%) | -0.38mm (-12.5%) / +Not Specified |
| 4" | 40S | 114.3 | 6.02 | ±0.86mm (±0.75%) | -0.75mm (-12.5%) / +Not Specified |
| 8" | 10S | 219.1 | 3.76 | ±1.64mm (±0.75%) | -0.47mm (-12.5%) / +Not Specified |
| 12" | 10S | 323.9 | 4.57 | ±2.43mm (±0.75%) | -0.57mm (-12.5%) / +Not Specified |
| 24" | 10S | 610.0 | 6.35 | ±4.58mm (±0.75%) | -0.79mm (-12.5%) / +Not Specified |
- Supply Length / Form: Fixed lengths 1–12 m; custom lengths and cut-to-length available
- Available Grades: 304, 304L, 316, 316L, 321, 310S, 317L, 904L, duplex 2205, etc.
- Surface Finish: Annealed & pickled, polished, bright annealed, or as requested
- Tolerance Compliance: Per ASTM A999 (pipe) / A1016 (tube), EN ISO 1127, JIS G3459, or GB/T general tolerance tables
Markets: Heat exchangers, boiler tube, condensers (Tube · OD-based)
| OD (mm) | BWG | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|---|
| 6.35 | 20 | 0.89 | ±0.10mm (±1.6%) | ±0.09mm (±10%) |
| 9.53 | 18 | 1.24 | ±0.10mm (±1.0%) | ±0.12mm (±10%) |
| 12.70 | 16 | 1.65 | ±0.10mm (±0.8%) | ±0.17mm (±10%) |
| 15.88 | 16 | 1.65 | ±0.10mm (±0.6%) | ±0.17mm (±10%) |
| 19.05 | 16 | 1.65 | ±0.10mm (±0.5%) | ±0.17mm (±10%) |
| 22.23 | 16 | 1.65 | ±0.09mm (±0.4%) | ±0.17mm (±10%) |
| 25.40 | 14 | 2.11 | ±0.10mm (±0.4%) | ±0.21mm (±10%) |
| 31.75 | 14 | 2.11 | ±0.13mm (±0.4%) | ±0.21mm (±10%) |
| 38.10 | 12 | 2.77 | ±0.15mm (±0.4%) | ±0.28mm (±10%) |
| 44.45 | 12 | 2.77 | ±0.18mm (±0.4%) | ±0.28mm (±10%) |
| 50.80 | 10 | 3.40 | ±0.20mm (±0.4%) | ±0.34mm (±10%) |
| 63.50 | 10 | 3.40 | ±0.25mm (±0.4%) | ±0.34mm (±10%) |
- Supply Length / Form: Fixed lengths 1–12 m; custom lengths and cut-to-length available
- Available Grades: 304, 304L, 316, 316L, 321, 310S, 317L, 904L, duplex 2205, etc.
- Surface Finish: Annealed & pickled, polished, bright annealed, or as requested
- Tolerance Compliance: Per ASTM A999 (pipe) / A1016 (tube), EN ISO 1127, JIS G3459, or GB/T general tolerance tables
Markets: Europe, Middle East — pressure piping, petrochemical, power gen
| OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|
| 17.2 | 2.0 | ±0.2mm (±1.2%) | ±0.25mm (±12.5%) |
| 21.3 | 2.3 | ±0.2mm (±0.9%) | ±0.29mm (±12.5%) |
| 26.9 | 2.3 | ±0.2mm (±0.7%) | ±0.29mm (±12.5%) |
| 33.7 | 2.6 | ±0.3mm (±0.9%) | ±0.33mm (±12.5%) |
| 48.3 | 2.6 | ±0.36mm (±0.75%) | ±0.33mm (±12.5%) |
| 60.3 | 2.9 | ±0.45mm (±0.75%) | ±0.36mm (±12.5%) |
| 76.1 | 2.9 | ±0.57mm (±0.75%) | ±0.36mm (±12.5%) |
| 114.3 | 3.6 | ±0.86mm (±0.75%) | ±0.45mm (±12.5%) |
| 168.3 | 4.0 | ±1.26mm (±0.75%) | ±0.50mm (±12.5%) |
| 219.1 | 6.3 | ±1.64mm (±0.75%) | ±0.79mm (±12.5%) |
| 355.6 | 8.0 | ±3.56mm (±1.0%) | ±1.00mm (±12.5%) |
| 508.0 | 10.0 | ±5.08mm (±1.0%) | ±1.25mm (±12.5%) |
- Supply Length / Form: Fixed lengths 1–12 m; custom lengths and cut-to-length available
- Available Grades: 304, 304L, 316, 316L, 321, 310S, 317L, 904L, duplex 2205, etc.
- Surface Finish: Annealed & pickled, polished, bright annealed, or as requested
- Tolerance Compliance: Per ASTM A999 (pipe) / A1016 (tube), EN ISO 1127, JIS G3459, or GB/T general tolerance tables
Markets: Japan, Southeast Asia, Japanese-affiliated projects
| OD (mm) | Sch | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|---|
| 17.3 | 10S | 1.65 | ±0.4mm (±2.3%) | ±0.21mm (±12.5%) |
| 21.7 | 10S | 2.1 | ±0.4mm (±1.8%) | ±0.26mm (±12.5%) |
| 27.2 | 10S | 2.1 | ±0.4mm (±1.5%) | ±0.26mm (±12.5%) |
| 34.0 | 10S | 2.8 | ±0.4mm (±1.2%) | ±0.35mm (±12.5%) |
| 48.6 | 10S | 2.8 | ±0.36mm (±0.75%) | ±0.35mm (±12.5%) |
| 60.5 | 10S | 2.8 | ±0.45mm (±0.75%) | ±0.35mm (±12.5%) |
| 89.1 | 10S | 3.2 | ±0.67mm (±0.75%) | ±0.40mm (±12.5%) |
| 114.3 | 10S | 3.5 | ±0.86mm (±0.75%) | ±0.44mm (±12.5%) |
| 165.2 | 10S | 4.0 | ±1.24mm (±0.75%) | ±0.50mm (±12.5%) |
| 216.3 | 10S | 4.5 | ±1.62mm (±0.75%) | ±0.56mm (±12.5%) |
| 355.6 | 10S | 6.4 | ±3.56mm (±1.0%) | ±0.80mm (±12.5%) |
| 609.6 | 10S | 9.5 | ±6.10mm (±1.0%) | ±1.19mm (±12.5%) |
- Supply Length / Form: Fixed lengths 1–12 m; custom lengths and cut-to-length available
- Available Grades: 304, 304L, 316, 316L, 321, 310S, 317L, 904L, duplex 2205, etc.
- Surface Finish: Annealed & pickled, polished, bright annealed, or as requested
- Tolerance Compliance: Per ASTM A999 (pipe) / A1016 (tube), EN ISO 1127, JIS G3459, or GB/T general tolerance tables
Markets: China domestic & Belt-and-Road / Chinese-contracted EPC projects
| OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|
| 6 | 1.0 | ±0.10mm (±1.7%) | ±0.12mm (±12.5%) |
| 14 | 2.0 | ±0.15mm (±1.1%) | ±0.25mm (±12.5%) |
| 25 | 2.5 | ±0.25mm (±1.0%) | ±0.31mm (±12.5%) |
| 34 | 3.0 | ±0.34mm (±1.0%) | ±0.38mm (±12.5%) |
| 45 | 3.5 | ±0.45mm (±1.0%) | ±0.44mm (±12.5%) |
| 76 | 4.0 | ±0.76mm (±1.0%) | ±0.50mm (±12.5%) |
| 108 | 4.0 | ±1.08mm (±1.0%) | ±0.50mm (±12.5%) |
| 159 | 4.5 | ±1.59mm (±1.0%) | ±0.56mm (±12.5%) |
| 219 | 6.0 | ±2.19mm (±1.0%) | ±0.75mm (±12.5%) |
| 273 | 7.0 | ±2.73mm (±1.0%) | ±0.88mm (±12.5%) |
| 377 | 9.0 | ±3.77mm (±1.0%) | ±1.12mm (±12.5%) |
| 630 | 12.0 | ±6.30mm (±1.0%) | ±1.50mm (±12.5%) |
- Supply Length / Form: Fixed lengths 1–12 m; custom lengths and cut-to-length available
- Available Grades: 304, 304L, 316, 316L, 321, 310S, 317L, 904L, duplex 2205, etc.
- Surface Finish: Annealed & pickled, polished, bright annealed, or as requested
- Tolerance Compliance: Per ASTM A999 (pipe) / A1016 (tube), EN ISO 1127, JIS G3459, or GB/T general tolerance tables
Standards
→ Scroll right for full chemistry & mechanical data
| Grade | US (UNS) | EN (W.Nr.) | Japan (JIS) | China (GB/T) | C % (Max) | Si % (Max) | Mn % (Max) | P % (Max) | S % (Max) | Cr % | Ni % | Mo % | Others | Tensile σb (Min.) | Yield σ0.2 (Min.) | Elongation (Min.) | Hardness (Max) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2205 Duplex* | S32205 | 1.4462 | SUS329J3L* | 022Cr23Ni5Mo3N* | 0.030 | 1.00 | 2.00 | 0.030 | 0.020 | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | N: 0.14-0.20 | 655 MPa (95 ksi) | 450 MPa (65 ksi) | 25% | ≤31 HRC / ≤293 HB |
| 304 | S30400 | 1.4301 | SUS304 | 06Cr19Ni10 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-10.5 | — | — | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤92 HRB / ≤215 HV |
| 304L | S30403 | 1.4307 | SUS304L | 022Cr19Ni10 | 0.030 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-12.0 | — | — | 485 MPa (70 ksi) | 170 MPa (25 ksi) | 35% | ≤92 HRB / ≤215 HV |
| 310S | S31008 | 1.4845 | SUS310S | 06Cr25Ni20 | 0.08 | 1.50 | 2.00 | 0.045 | 0.030 | 24.0-26.0 | 19.0-22.0 | — | — | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 316 | S31600 | 1.4401 | SUS316 | 06Cr17Ni12Mo2 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | — | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 316L | S31603 | 1.4404 | SUS316L | 022Cr17Ni12Mo2 | 0.030 | 0.75 | 2.00 | 0.045 | 0.005-0.017* | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | — | 485 MPa (70 ksi) | 170 MPa (25 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 317L | S31703 | 1.4438 | SUS317L | 022Cr19Ni13Mo3 | 0.030 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 11.0-15.0 | 3.0-4.0 | — | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 321 | S32100 | 1.4541 | SUS321 | 06Cr18Ni11Ti | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 17.0-19.0 | 9.0-12.0 | — | Ti ≥ 5×(C+N) | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 904L* | N08904 | 1.4539 | N/A | 015Cr20Ni18Mo6CuN* | 0.020 | 1.00 | 2.00 | 0.045 | 0.035 | 19.0-23.0 | 23.0-28.0 | 4.0-5.0 | Cu: 1.0-2.0 | 490 MPa (71 ksi) | 215 MPa (31 ksi) | 35% | ≤90 HRB / ≤200 HV |
- Standards Conformance: Strictly conforms to ASTM A213/A269/A312/A511/A789, EN 10216-5/10217-7, DIN 17456/17458, JIS G3459, and GB/T 14976.
- Delivery Condition: Solution Annealed & Pickled (AP) / Bright Annealed (BA) / Polished, or as requested.
- Mill Test Certificate: 100% full material traceability with EN 10204 3.1 MTC provided with every shipment.
- Controlled Sulfur Range & Notes: 316L S (Max) can be held to 0.005–0.017% upon request for high-precision orbital welding quality. *904L has no standard JIS designation; 904L and 2205 duplex GB/JIS cross-reference figures are compiled from secondary industry sources — please confirm exact specification and heat-specific mill test certificate with TeCarve for critical applications.
Features
• 100% seamless structure for higher pressure and corrosion resistance
• Uniform wall thickness and excellent ovality control
• Smooth inner surface, suitable for fluid and gas transmission
• Available in multiple stainless steel grades and sizes
• Precision production with strict dimensional tolerance
• Complies with international quality and safety standards
• Excellent weldability and machinability
• Chemical & Petrochemical Processing
• Heat Exchangers and Boilers
• Pharmaceutical and Food Processing Equipment
• Instrumentation and Control Systems
• Hydraulic and Pneumatic Lines
• Power Generation and Nuclear Plants
• Marine and Offshore Engineering
Applications
For pressure-critical seamless tube projects, review how buyers can verify our factories, heat-treatment lines, NDT capability, and batch traceability before approving an order.
Quality Control
• Raw material inspection and certification
• Cold drawing and heat treatment under controlled environments
• Eddy current testing and ultrasonic testing for internal flaws
• Hydrostatic pressure testing to ensure strength
• Dimensional inspection and surface finish assessment
• Final inspection with packaging conformity and traceability
• Compliance with ISO 9001, PED, and other relevant certifications
Manufacturing Process
Seamless tube is produced at our Wenzhou manufacturing partner (Zhejiang Qinghui Pipeline Technology Co., Ltd.) on a dedicated hot-piercing and cold-rolling line, from round billet to finished tube. Photos below are from the actual production floor.
packaging
PVC Wrapping
& End Caps
Custom Barcoding
& Labeling
Anti-Corrosion
& Moisture Protection
Seaworthy Wooden Cases & Pallets
Seamless Pipe Production & Export Photos
Real factory, inspection, packaging and loading photos from TeCarve gallery pages.
Tailored Solutions, Timely Fulfillment
CUSTOMIZATION
& DELIVERY
Flexible Custom Manufacturing
We tailor stainless steel seamless pipe and tube by outer diameter, wall thickness, custom length, material grade, surface finish, and dimensional tolerance for the intended pressure, temperature, or sanitary service.
Low MOQ & Rapid Prototyping
Small batch customization and sample production are supported, helping you shorten your development cycle and market entry.
Optimized Lead Time
Most orders ship within 10–25 days after deposit. Exact timing depends on product specification, required documentation, and order volume.
Global Logistics & On-Time Delivery
For seamless pipe exports to over 50 countries, we emphasize seaworthy wooden cases and pallets together with anti-corrosion and moisture protection for long-distance handling.
Frequently Asked Questions
What is stainless steel seamless pipe?
Stainless steel seamless pipe is manufactured from a solid round billet that is hot-pierced and cold-drawn without any weld seam, delivering superior pressure resistance and a uniform grain structure. TeCarve produces seamless pipes in grades 304, 316L, 316, 321, 904L, and duplex stainless steel, conforming to ASTM A213, ASTM A269, ASTM A312, ASTM A511, ASTM A789, EN 10216-5, and EN 10217-7 standards.
What sizes are available for stainless steel seamless pipe?
Our seamless stainless steel pipes are available in outer diameter from 6 mm to 630 mm with wall thickness from 0.5 mm to 30 mm. Standard lengths are 6 m; random or fixed lengths are available. Custom OD/wall combinations are produced to order.
What is the difference between seamless and welded stainless steel pipe?
Seamless pipe has no weld seam, offering higher pressure ratings (typically 20–30% stronger) and better corrosion uniformity. It is preferred for critical service: oil & gas, high-pressure chemical, hydraulic, and heat exchanger applications. Welded pipe is more economical for lower-pressure, structural, or decorative use.
What industries use stainless steel seamless pipe?
Stainless steel seamless pipe is widely used in oil & gas, chemical and petrochemical processing, pharmaceutical manufacturing, power generation, food and beverage, and heat exchanger industries where pressure integrity and corrosion resistance are critical.
What is the MOQ and delivery time for seamless stainless steel pipe?
The minimum order quantity is typically 100 kg. Standard delivery is 15–25 business days; expedited delivery within 10 days is available for in-stock sizes. Custom dimensions may require 25–35 days.