China Stainless Steel
stainless steel
welded pipe & tube
TeCarve is a welded stainless steel pipe supplier and manufacturer serving industrial, structural and decorative fabrication requirements. The range covers TIG, plasma, laser and ERW welded pipe and tube in grades 201, 202, 304, 304L, 316, 316L, 409, 410, 430 and Duplex. Outer diameters from 6 mm to 1016 mm, wall thicknesses from 0.5 mm to 25 mm, lengths up to 12 meters and customized finishes are available.
For custom welded tube dimensions, finishes, and production coordination, see our custom stainless steel tube fabrication service.
Specifications
Available Sizes by Standard
Markets: N. America, S. America, Middle East EPC, oil & gas (Welded Pipe · NPS/Sch)
| NPS | Sch | OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|---|---|
| 1/8" | 10S | 10.3 | 1.24 | +0.4mm / -0.8mm | +20.0% / -12.5% |
| 1/2" | 10S | 21.3 | 2.11 | +0.4mm / -0.8mm | +20.0% / -12.5% |
| 3/4" | 10S | 26.7 | 2.11 | +0.4mm / -0.8mm | +20.0% / -12.5% |
| 1" | 10S | 33.4 | 2.77 | +0.4mm / -0.8mm | +20.0% / -12.5% |
| 1" | 40S | 33.4 | 3.38 | +0.4mm / -0.8mm | +20.0% / -12.5% |
| 2" | 10S | 60.3 | 2.77 | +0.8mm / -0.8mm | +20.0% / -12.5% |
| 2" | 40S | 60.3 | 3.91 | +0.8mm / -0.8mm | +20.0% / -12.5% |
| 4" | 10S | 114.3 | 3.05 | +1.6mm / -0.8mm | +22.5% / -12.5% |
| 4" | 40S | 114.3 | 6.02 | +1.6mm / -0.8mm | +15.0% / -12.5% |
| 8" | 10S | 219.1 | 3.76 | +2.4mm / -0.8mm | +22.5% / -12.5% |
| 12" | 10S | 323.9 | 4.57 | +2.4mm / -0.8mm | +22.5% / -12.5% |
| 24" | 10S | 610.0 | 6.35 | +3.2mm / -0.8mm | +17.5% / -12.5% |
- Supply Length / Form: Fixed lengths 1–12 m; custom lengths and cut-to-length available
- Available Grades: 304, 304L, 316, 316L, 321, 409, 410, 430, etc.
- Surface Finish: Annealed & pickled, polished, bright annealed, or as requested
- Tolerance Compliance: Per ASTM A999 (pipe) / A554 (tube), EN ISO 1127, JIS G3448, or GB/T general tolerance tables
Markets: N. America — ornamental, structural & mechanical welded tube (Tube · OD-based)
| OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|
| 9.53 | 0.89 | ±0.10mm | ±10.0% |
| 12.70 | 1.24 | ±0.13mm | ±10.0% |
| 19.05 | 1.65 | ±0.13mm | ±10.0% |
| 25.40 | 1.65 | ±0.13mm | ±10.0% |
| 25.40 | 2.11 | ±0.25mm | ±10.0% |
| 38.10 | 1.65 | ±0.20mm | ±10.0% |
| 38.10 | 2.77 | ±0.25mm | ±10.0% |
| 50.80 | 1.65 | ±0.28mm | ±10.0% |
| 50.80 | 2.77 | ±0.30mm | ±10.0% |
| 76.20 | 2.77 | ±0.36mm | ±10.0% |
| 101.60 | 3.05 | ±0.51mm | ±10.0% |
| 152.40 | 3.40 | ±0.64mm | ±10.0% |
- Supply Length / Form: Fixed lengths 1–12 m; custom lengths and cut-to-length available
- Available Grades: 304, 304L, 316, 316L, 321, 409, 410, 430, etc.
- Surface Finish: Annealed & pickled, polished, bright annealed, or as requested
- Tolerance Compliance: Per ASTM A999 (pipe) / A554 (tube), EN ISO 1127, JIS G3448, or GB/T general tolerance tables
Markets: Europe, Middle East — welded 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, 409, 410, 430, etc.
- Surface Finish: Annealed & pickled, polished, bright annealed, or as requested
- Tolerance Compliance: Per ASTM A999 (pipe) / A554 (tube), EN ISO 1127, JIS G3448, or GB/T general tolerance tables
Markets: Japan, Southeast Asia — light-gauge welded pipe for ordinary piping
| OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|
| 21.7 | 1.2 | ±0.40mm (±1.8%) | ±0.15mm (±12.5%) |
| 27.2 | 1.2 | ±0.40mm (±1.5%) | ±0.15mm (±12.5%) |
| 34.0 | 1.5 | ±0.40mm (±1.2%) | ±0.19mm (±12.5%) |
| 42.7 | 1.5 | ±0.32mm (±0.75%) | ±0.19mm (±12.5%) |
| 48.6 | 1.5 | ±0.36mm (±0.75%) | ±0.19mm (±12.5%) |
| 60.5 | 2.0 | ±0.45mm (±0.75%) | ±0.25mm (±12.5%) |
| 76.3 | 2.0 | ±0.57mm (±0.75%) | ±0.25mm (±12.5%) |
| 89.1 | 2.0 | ±0.67mm (±0.75%) | ±0.25mm (±12.5%) |
| 101.6 | 2.0 | ±0.76mm (±0.75%) | ±0.25mm (±12.5%) |
| 114.3 | 2.5 | ±0.86mm (±0.75%) | ±0.31mm (±12.5%) |
| 165.2 | 2.5 | ±1.24mm (±0.75%) | ±0.31mm (±12.5%) |
| 216.3 | 3.0 | ±1.62mm (±0.75%) | ±0.38mm (±12.5%) |
- Supply Length / Form: Fixed lengths 1–12 m; custom lengths and cut-to-length available
- Available Grades: 304, 304L, 316, 316L, 321, 409, 410, 430, etc.
- Surface Finish: Annealed & pickled, polished, bright annealed, or as requested
- Tolerance Compliance: Per ASTM A999 (pipe) / A554 (tube), EN ISO 1127, JIS G3448, or GB/T general tolerance tables
Markets: China domestic & Belt-and-Road / Chinese-contracted EPC projects — welded fluid pipe
| 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, 409, 410, 430, etc.
- Surface Finish: Annealed & pickled, polished, bright annealed, or as requested
- Tolerance Compliance: Per ASTM A999 (pipe) / A554 (tube), EN ISO 1127, JIS G3448, 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 % | Tensile σb (Min.) | Yield σ0.2 (Min.) | Elongation (Min.) | Hardness (Max) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
| 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 | 0.030 | 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 |
| 321 | S32100 | 1.4541 | SUS321 | 06Cr18Ni11Ti | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 17.0-19.0 | 9.0-12.0 | — | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 409 | S40900 | 1.4512 | SUS409 | 022Cr12Ti | 0.03 | 1.00 | 1.00 | 0.040 | 0.020 | 10.5-11.75 | — | — | 380 MPa (55 ksi) | 205 MPa (30 ksi) | 20% | ≤88 HRB / ≤190 HV |
| 410 | S41000 | 1.4006 | SUS410 | 12Cr13 | 0.15 | 1.00 | 1.00 | 0.040 | 0.030 | 11.5-13.5 | — | — | 450 MPa (65 ksi) | 205 MPa (30 ksi) | 20% | ≤96 HRB / ≤210 HV |
| 430 | S43000 | 1.4016 | SUS430 | 10Cr17 | 0.12 | 1.00 | 1.00 | 0.040 | 0.030 | 16.0-18.0 | — | — | 450 MPa (65 ksi) | 205 MPa (30 ksi) | 22% | ≤89 HRB / ≤200 HV |
- Standards Conformance: ASTM A249/A269/A270/A312/A554/A778 · EN 10217/10296/10312 · DIN 17455/11850 · JIS G3448/G3463 · GB/T 12771 / GB 19228
- 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.
Features
• Superior corrosion resistance for harsh environments
• Available in decorative, sanitary, and structural grades
• High dimensional accuracy and smooth weld seams
• Cost-effective alternative to seamless pipes in low-pressure systems
• Custom finishes and cutting services available
Applications
For welded tube used in process, sanitary, or marine systems, see how to verify TeCarve's welding, inspection, and order-traceability process, including optional third-party witnessing.
Quality Control
• Raw material sourcing from certified stainless steel mills
• Inline welding integrity testing (Eddy Current or X-Ray)
• 100% hydrostatic testing (on demand)
• Surface finish inspection and dimensional verification
• Third-party inspection available for export standards
Common Causes of Weld Seam Failure
Most weld seam problems in stainless steel welded tube trace back to a small set of root causes: incomplete penetration or lack of fusion (current too low, travel speed too fast, poor arc alignment), burn-through (current too high, gap too large), porosity from contamination or unstable shielding, and root oxidation (“sugaring”) from insufficient backside purge gas. The heat-affected zone around a weld can also become more susceptible to pitting and stress corrosion cracking if the passive layer is disturbed or residual stress is high, so weld quality affects long-term corrosion resistance, not just initial strength.
Because these defects can be subtle, TeCarve inspects every welded tube batch with inline welding integrity testing (Eddy Current or X-Ray) and offers 100% hydrostatic testing on demand, catching incomplete fusion, porosity, and root defects before shipment rather than relying on visual inspection alone.
packaging
PVC Wrapping
& End Caps
Custom Barcoding
& Labeling
Anti-Corrosion
& Moisture Protection
Seaworthy Wooden Cases & Pallets
Welded Pipe Packaging & Inspection Photos
Real factory, inspection, packaging and loading photos from TeCarve gallery pages.
Tailored Solutions, Timely Fulfillment
CUSTOMIZATION
& DELIVERY
Flexible Custom Manufacturing
We customize stainless steel welded pipe and tube by diameter, wall thickness, length, surface finish, material grade, and the required TIG, plasma, laser, or ERW welding type.
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 welded pipe shipments to over 50 countries, PVC wrapping and end caps protect finished surfaces while seaworthy wooden cases and pallets support secure transport.
Frequently Asked Questions
How is stainless steel welded pipe manufactured?
Stainless steel welded pipe is formed by rolling flat strip into a tube and joining the seam by TIG (GTAW) or laser welding, followed by annealing and bright-annealing for a clean, uniform finish. TeCarve uses automated TIG welding for consistent seam integrity across all production runs.
What grades are available for welded stainless steel pipe?
We supply welded stainless steel pipe in grades 201, 202, 304, 304L, 316, 316L, 409, 410, 430, and duplex stainless steel, conforming to ASTM A249, ASTM A269, ASTM A270, ASTM A312, ASTM A554, ASTM A778, EN 10217, EN 10296, EN 10312, DIN 17455, and DIN 11850.
What surface finishes are available for welded stainless steel pipe?
Available finishes: 2B (mill), No. 4 (brushed/satin), No. 8 (mirror), BA (bright annealed), and Ra ≤ 0.8 µm polished for sanitary service. Internal polishing to Ra ≤ 0.4 µm is available for pharmaceutical-grade tube.
What are typical applications for welded stainless steel pipe?
Welded stainless steel pipe is ideal for food processing, dairy, pharmaceutical, water treatment, HVAC, decorative and architectural piping, and low-to-medium-pressure industrial systems where cost efficiency is important.
Can I order custom lengths and wall thicknesses for welded pipe?
Yes. Custom lengths up to 12 m, non-standard wall thicknesses, and end treatments (beveled, plain, threaded, flanged) are available. Minimum order quantities apply for custom specifications; contact TeCarve sales for a quote.