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 |
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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 | Welded 304 Stainless Steel Round Pipe ，Stainless Steel Round Pipe ASTM A312 ，SS Round Pipe Mirror Finish | ||
Welded stainless steel round pipe is manufactured by forming a flat stainless steel strip or sheet into a cylindrical shape and welding the longitudinal seam. This process creates a cost-effective, dimensionally consistent pipe suitable for a wide range of industrial, commercial, and architectural applications.
While seamless pipes are preferred for extremely high-pressure environments, welded pipes offer exceptional value for general-purpose applications where pressure ratings are moderate, but cost efficiency, size availability, and dimensional accuracy are priorities.
Modern welding technologies — including Tungsten Inert Gas (TIG), Laser, and Electric Resistance Welding (ERW) — produce weld seams that are virtually indistinguishable from the base metal, with many welded pipes capable of meeting or exceeding the same pressure ratings as seamless alternatives.
| Parameter | Details |
|---|---|
| Product Name | Welded Stainless Steel Round Pipe |
| Standards | ASTM A312, A358, A778, A269, EN 10217-7, JIS G3459, GB/T 12771 |
| Grades | 304, 304L, 316, 316L, 316Ti, 321, 310S, 317L, 904L, Duplex 2205 |
| Dimensions | 1/2″ – 48″+ OD (12.7mm – 1219mm+) |
| Wall Thickness | Schedule 5S, 10S, 20, 40, 80 (0.5mm – 20mm) |
| Length | 3m – 12m (random, fixed, or custom lengths) |
| Weld Types | ERW (Electric Resistance Welded), EFW (Electric Fusion Welded), TIG |
| Surface Finish | Mill Finish, Pickled, Polished (Mirror), Brushed (Hairline) |
| Manufacturing Process | Cold Rolled / Hot Rolled strip → Forming → Welding → Heat Treatment → Sizing |
| Grade | Standard | Key Characteristics | Typical Applications |
|---|---|---|---|
| 304 | ASTM A312 | General-purpose, good corrosion resistance | Food processing, dairy, beverage lines |
| 304L | ASTM A312 | Low carbon, better weldability | Chemical tanks, welded equipment |
| 316 | ASTM A312 | Molybdenum added, chloride resistance | Marine, pharmaceutical, coastal |
| 316L | ASTM A312 | Low-carbon version of 316 | High chloride environments |
| 316Ti | ASTM A249 | Titanium stabilized, high temperature | Exhaust systems, heat exchangers |
| 321 | ASTM A249 | Titanium stabilized, 800-1500°F service | Aircraft, exhaust stacks |
| 310S | ASTM A312 | High temperature up to 2000°F | Furnace parts, heat treatment |
| 317L | ASTM A312 | Higher molybdenum than 316 | Pulp & paper, chemical processing |
| 904L | ASTM A312 | Super austenitic, severe corrosion | Sulfuric acid, seawater |
| 2205 | ASTM A358 | Duplex, high strength + SCC resistance | Offshore, desalination |
| Grade | C | Mn | Si | Cr | Ni | Mo | Others |
|---|---|---|---|---|---|---|---|
| 304 | ≤0.08 | ≤2.00 | ≤1.00 | 18.0-20.0 | 8.0-11.0 | – | – |
| 304L | ≤0.030 | ≤2.00 | ≤1.00 | 18.0-20.0 | 8.0-12.0 | – | – |
| 316 | ≤0.08 | ≤2.00 | ≤1.00 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | – |
| 316L | ≤0.030 | ≤2.00 | ≤1.00 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | – |
| 310S | ≤0.08 | ≤2.00 | ≤1.50 | 24.0-26.0 | 19.0-22.0 | – | – |
| 2205 | ≤0.030 | ≤2.00 | ≤1.00 | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | N 0.14-0.20 |
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB max) |
|---|---|---|---|---|
| 304 | ≥515 | ≥205 | ≥40 | ≤201 |
| 304L | ≥485 | ≥170 | ≥40 | ≤201 |
| 316 | ≥515 | ≥205 | ≥40 | ≤217 |
| 316L | ≥485 | ≥170 | ≥40 | ≤217 |
| 310S | ≥515 | ≥205 | ≥40 | ≤217 |
| 2205 | ≥620 | ≥450 | ≥25 | ≤293 |
| Property | 304/304L | 316/316L | 2205 |
|---|---|---|---|
| Density (g/cm³) | 7.93 | 7.98 | 7.80 |
| Modulus of Elasticity (GPa) | 193 | 193 | 190 |
| Thermal Conductivity (W/m·K) | 16.2 | 16.3 | 19.0 |
| Coefficient of Thermal Expansion (10⁻⁶/°C) | 17.2 | 17.2 | 13.7 |
| Electrical Resistivity (μΩ·cm) | 72 | 74 | 80 |
| NPS (inch) | OD (mm) | Schedule 5S (mm) | Schedule 10S (mm) | Schedule 40S (mm) | Schedule 80S (mm) |
|---|---|---|---|---|---|
| 1/2″ | 21.3 | 1.65 | 2.11 | 2.77 | 3.73 |
| 3/4″ | 26.7 | 1.65 | 2.11 | 2.87 | 3.91 |
| 1″ | 33.4 | 1.65 | 2.77 | 3.38 | 4.55 |
| 1-1/2″ | 48.3 | 1.65 | 2.77 | 3.68 | 5.08 |
| 2″ | 60.3 | 1.65 | 2.77 | 3.91 | 5.54 |
| 3″ | 88.9 | 2.11 | 3.05 | 5.49 | 7.62 |
| 4″ | 114.3 | 2.11 | 3.05 | 6.02 | 8.56 |
| 6″ | 168.3 | 2.77 | 3.40 | 7.11 | 10.97 |
| 8″ | 219.1 | 2.77 | 3.76 | 8.18 | 12.70 |
| 10″ | 273.1 | 3.40 | 4.19 | 9.27 | 15.09 |
| 12″ | 323.9 | 3.40 | 4.57 | 10.31 | 17.48 |
| 14″ | 355.6 | 3.96 | 4.78 | 11.13 | 19.05 |
| 16″ | 406.4 | 4.19 | 4.78 | 12.70 | 21.44 |
| 18″ | 457.2 | 4.19 | 4.78 | 14.27 | 23.83 |
| 20″ | 508.0 | 4.78 | 5.54 | 15.09 | 26.19 |
| 24″ | 609.6 | 5.54 | 6.35 | 17.48 | 30.96 |
Larger diameters up to 48″ available upon request
| Parameter | Tolerance |
|---|---|
| OD (≤48″) | ±0.5% |
| OD (>48″) | ±1.0% |
| Wall Thickness | ±10% |
| Length (fixed) | +3mm / -0mm |
| Straightness | ≤1.5mm per meter |
| Out-of-Roundness | Within OD tolerance |
| Step | Description |
|---|---|
| Coil Preparation | High-quality stainless steel coil is inspected and slit to the required width |
| Forming | The strip is progressively roll-formed into a cylindrical shape |
| Welding | Longitudinal seam is welded using TIG, ERW, or Laser (no filler metal for autogenous welding) |
| Weld Bead Trimming | Internal and external weld beads are trimmed for a smooth surface |
| Heat Treatment | Solution annealing at 1040-1120°C to restore corrosion resistance |
| Sizing | Pipe passes through sizing rolls to achieve precise OD |
| Pickling/Polishing | Removal of oxide scale and surface finishing |
| Feature | Welded Pipe | Seamless Pipe |
|---|---|---|
| Cost | 20-30% lower | Higher |
| Lead Time | Shorter | Longer |
| Size Range | 1/2″ to 48″+ | 1/2″ to 24″ |
| Wall Thickness Consistency | Excellent | Good |
| Weld Seam | Present (but high quality) | None |
| Pressure Rating | High (meets ASTM standards) | Very High |
| Corrosion Resistance | Excellent (with proper HT) | Excellent |
| Best For | General industrial, large diameters, cost-sensitive projects | Extreme high pressure, critical safety applications |
Key Insight: Modern welded pipes — especially those that are solution annealed and full-penetration welded — perform nearly identically to seamless pipes for the vast majority of applications. Many ASTM standards treat welded and seamless as interchangeable for pressure ratings.
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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