Shanxi Zhongcheng Metal Co., Ltd.
| Payment Terms | T/T，D/P，D/A，Western Union，PayPal |
| Supply Ability | 10000tons |
| Delivery Time | 15-25days |
| Packaging Details | Wooden pallets, wooden crates, woven bags, etc. |
| Country of Origin | MADE IN CHAINA |
| Brand | Baosteel，TISCO |
| Certifications | ISO/EN 10204 Type 3.1 / 3.2 available |
| Grade | 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507 / 630 (17-4PH) |
| MOQ | 100kg |
| Packaging | Wooden Case / Wooden Pallet / Steel Frame / Carton / Woven Bag |
| Supply Capacity | 10000tons |
| Brand Name | Baosteel，TISCO |
| Model Number | 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507 |
| Certification | EN 10204 Type 3.1 / 3.2 available |
| Place of Origin | MADE IN CHAINA |
View Detail Information
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Product Specification
| Payment Terms | T/T，D/P，D/A，Western Union，PayPal | Supply Ability | 10000tons |
| Delivery Time | 15-25days | Packaging Details | Wooden pallets, wooden crates, woven bags, etc. |
| Country of Origin | MADE IN CHAINA | Brand | Baosteel，TISCO |
| Certifications | ISO/EN 10204 Type 3.1 / 3.2 available | Grade | 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507 / 630 (17-4PH) |
| MOQ | 100kg | Packaging | Wooden Case / Wooden Pallet / Steel Frame / Carton / Woven Bag |
| Supply Capacity | 10000tons | Brand Name | Baosteel，TISCO |
| Model Number | 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507 | Certification | EN 10204 Type 3.1 / 3.2 available |
| Place of Origin | MADE IN CHAINA | ||
| High Light | Longitudinal Stainless Steel Welded Pipe ，Stainless Steel Welded Pipe Pickled Finish | ||
The Longitudinal Welded Stainless Steel Pipe is manufactured by roll forming high-quality stainless Steel coil into a cylindrical shape and welding the seam along the length of the pipe using advanced TIG (GTAW), laser, or plasma welding technologies. This continuous longitudinal seam provides a strong, uniform weld that is fully annealed to restore corrosion resistance and mechanical properties. Longitudinal welded pipe offers a cost-effective alternative to seamless pipe while delivering excellent dimensional accuracy, consistent wall thickness, and reliable performance for a wide range of industrial, commercial, and sanitary applications.
| Parameter | Details |
|---|---|
| Standards | ASTM A312, A269, A249, A358; EN 10217-7; JIS G3459 |
| Available Grades | 304, 304L, 316, 316L, 321, 347, 310S |
| Outer Diameter | 6 mm – 1219 mm (1/8″ – 48″ NPS) |
| Wall Thickness | 0.5 mm – 12.7 mm |
| Length | 3m, 6m, or custom lengths up to 12m |
| Welding Process | TIG (GTAW), Laser, Plasma, or ERW |
| Weld Seam | Single longitudinal seam |
| Heat Treatment | Annealed after welding (standard) |
| Surface Finish | Mill finish, pickled, brushed, or polished |
| End Finish | Plain ends, beveled ends, or grooved |
| Grade | C ≤ | Si ≤ | Mn ≤ | P ≤ | S ≤ | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|---|
| 304 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-10.5 | – |
| 304L | 0.03 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-12.0 | – |
| 316 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 |
| 316L | 0.03 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 |
| Grade | Tensile Strength (MPa) min | Yield Strength (MPa) min | Elongation (%) min | Hardness (HB) max |
|---|---|---|---|---|
| 304 | 515 | 205 | 35 | 201 |
| 304L | 485 | 170 | 35 | 201 |
| 316 | 515 | 205 | 35 | 217 |
| 316L | 485 | 170 | 35 | 217 |
Tested in accordance with ASTM E8 / E8M.
| Weld Type | Seam Orientation | Typical Diameter | Typical Application |
|---|---|---|---|
| Longitudinal | Straight along length | 6 mm – 1219 mm | General purpose, process piping |
| Spiral / Helical | Continuous spiral | 300 mm – 3600 mm | Large diameter water/oil lines |
| ERW | Longitudinal (high frequency) | 6 mm – 610 mm | Utility and structural |
| Parameter | Tolerance |
|---|---|
| Outer diameter | ±0.4 mm for OD ≤ 48.3 mm; ±0.8% for larger |
| Wall thickness | ±12.5% |
| Length (fixed) | +0 / -3 mm |
| Straightness | 0.2% of total length |
| Ovality | Within OD tolerance |
| Step | Description |
|---|---|
| 1. Coil Unwinding | Stainless steel coil is unwound and leveled |
| 2. Slitting | Coil is slit to required width |
| 3. Forming | Strip is roll-formed into cylindrical shape |
| 4. Welding | Longitudinal seam is welded (TIG / Laser / Plasma) |
| 5. Seam Annealing | Weld seam is heat treated to restore properties |
| 6. Sizing | Pipe passes through sizing rollers |
| 7. Cutting | Cut to specified lengths |
| 8. Heat Treatment | Full annealing (if specified) |
| 9. Finishing | Pickling, polishing, or other surface treatment |
| Property | Longitudinal Welded | Seamless |
|---|---|---|
| Cost | Lower | Higher (30-50%) |
| Lead Time | Shorter | Longer |
| Max Diameter | 48″ (1219 mm) | 24″ (610 mm) |
| Wall Consistency | Excellent | Good |
| Weld Seam | Present – NDT verified | None |
| High Pressure Service | Moderate | High |
| Corrosive Service | Good (annealed) | Excellent |
Contact Us
For inquiries, technical datasheets, or custom sizes, please contact our sales team.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller
Year Established:
2010
Total Annual:
20000000-50000000
Employee Number:
50~100
Ecer Certification：
Verified Supplier
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