Industrial Welded Stainless Steel Pipe Schedule 5S To 40S Hydrostatically Tested
The Industrial Grade Welded Stainless Steel Pipe is manufactured from high-quality austenitic stainless steel coils, formed into a cylindrical shape, and longitudinally welded using advanced automatic welding processes. Designed to meet the demanding requirements of industrial applications, this pipe offers reliable corrosion resistance, consistent mechanical properties, and cost-effective performance. It is an excellent alternative to seamless pipe for moderate pressure and non-critical service conditions where weld integrity is verified through rigorous nondestructive testing.
| Parameter | Details |
|---|---|
| Standards | ASTM A312, A269, A358; EN 10217-7; JIS G3459 |
| Available Grades | 304, 304L, 316, 316L, 321, 347, 310S, 201 |
| Outer Diameter | 6 mm – 1219 mm (1/8″ – 48″ NPS) |
| Wall Thickness | 0.5 mm – 12.7 mm (Schedule 5S, 10S, 40S; or custom) |
| Length | Fixed lengths 3m / 6m, or random lengths up to 12m |
| Welding Process | TIG (GTAW), Plasma, ERW, or Submerged Arc (SAW) |
| Heat Treatment | Annealed after welding (standard) |
| Surface Finish | Pickled, passivated, or mill finish |
| End Finish | Plain ends, beveled ends, threaded, 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 |
Composition per ASTM A312. Low carbon (L) grades provide enhanced weldability.
| 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.
Corrosion Resistance – Suitable for water, steam, mild chemicals, and atmospheric exposure
Cost-Effective – Lower cost than seamless pipe for equivalent wall thickness and diameter
Wide Size Range – Available in diameters from 6 mm to 1219 mm (1/8″ to 48″)
Consistent Wall Thickness – High dimensional accuracy from coil feed stock
Weld Integrity – Verified by 100% hydrostatic testing and NDT methods
Annealed Condition – Restores corrosion resistance and ductility after welding
Low Carbon Options – 304L / 316L for welded applications without sensitization risk
Pressure Rated – Suitable for Schedule 5S through Schedule 40S service
Low to moderate pressure process lines
Cooling water and utility systems
Transfer lines for non-aggressive fluids
Dairy and brewery process piping
Edible oil and syrup transfer lines
Sanitary utility systems
Potable water distribution
Reverse osmosis feed lines
Wastewater collection and transfer
Steam distribution (low pressure)
Condensate return lines
Compressed air systems
Cooling tower piping
Structural handrails and supports
Fire protection sprinkler systems
Bridge drainage pipes
Low-corrosion service lines
White water and clarified liquor lines
| Schedule | Wall Thickness (mm) | Working Pressure (MPa) at 100°C |
|---|---|---|
| 5S | 1.65 | 3.5 – 5.5 (varies by diameter) |
| 10S | 2.77 | 6.0 – 9.0 |
| 40S | 3.91 | 8.5 – 12.0 |
Actual pressure ratings per ASME B31.3. Contact us for specific calculations.
| Property | Industrial Welded | Seamless |
|---|---|---|
| Cost | Lower | Higher (30-50%) |
| Lead Time | Shorter | Longer |
| Max Diameter | 48″ (1219 mm) | 24″ (610 mm) |
| Wall Thickness Consistency | Excellent | Good |
| Weld Seam | Present – NDT verified | None |
| High Pressure Service | Moderate (≤ Schedule 40S) | High (Schedule 80S+) |
| Corrosive Service | Good (annealed) | Excellent |
| Typical Applications | Utilities, process lines | Critical, high-pressure |
For inquiries, technical datasheets, or custom sizes, please contact our sales team.
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