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Quality ASTM A312 Welded Stainless Steel Tube Schedule 5S To 40S For Water Treatment Applications factory
Quality ASTM A312 Welded Stainless Steel Tube Schedule 5S To 40S For Water Treatment Applications factory

ASTM A312 Welded Stainless Steel Tube Schedule 5S To 40S For Water Treatment Applications

Basic Properties
Place of Origin: MADE IN CHAINA
Brand Name: Baosteel，TISCO
Certification: EN 10204 Type 3.1 / 3.2 available
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
Trading Properties
Minimum Order Quantity: 100kg
Price: Negotiable (Request a Quote)
Payment Terms: T/T，D/P，D/A，Western Union，PayPal
Supply Ability: 10000tons
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Molybdenum Alloy Stainless Steel Pipe

Stainless Steel Pipe Chloride Resistance

ASTM A312 Welded Stainless Steel Tube
Product Summary
The ASTM A312 Welded Stainless Steel Tube is manufactured in accordance with the internationally recognized ASTM A312 standard, which covers seamless, welded, and heavily cold worked welded austenitic stainless steel pipes. This welded tube is produced by roll forming stainless steel coil into a ...

Product Details

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ASTM A312 Welded Stainless Steel Tube

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Welded Stainless Steel Tube Schedule 5S
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
Price: Negotiable (Request A Quote)
Packaging: Wooden Case / Wooden Pallet / Steel Frame / Carton / Woven Bag
Delivery Time: 15-25days
Payment Terms: T/T，D/P，D/A，Western Union，PayPal
Supply Capacity: 10000tons
Product Description

The ASTM A312 Welded Stainless Steel Tube is manufactured in accordance with the internationally recognized ASTM A312 standard, which covers seamless, welded, and heavily cold worked welded austenitic stainless steel pipes. This welded tube is produced by roll forming stainless steel coil into a cylindrical shape and longitudinally welding the seam using advanced TIG (GTAW) or laser welding technology. After welding, the tube is fully annealed to restore corrosion resistance and mechanical properties. It offers a cost-effective, reliable solution for corrosive and high-temperature service in chemical processing, petrochemical, power generation, and general industrial applications.

Product Specifications
ParameterDetails
StandardsASTM A312 / ASME SA312
Available Grades304, 304L, 316, 316L, 321, 347, 310S
Outer Diameter6 mm – 1219 mm (1/8″ – 48″ NPS)
Wall Thickness0.5 mm – 12.7 mm (Schedule 5S, 10S, 40S)
Length3m, 6m, or custom lengths up to 12m
Welding ProcessTIG (GTAW), Laser, or Plasma
Weld SeamSingle longitudinal seam
Heat TreatmentAnnealed after welding (per ASTM A312)
Surface FinishPickled, passivated, mill finish, or polished
End FinishPlain ends, beveled ends, or grooved
Chemical Composition (Typical Values, %)
GradeC ≤Si ≤Mn ≤P ≤S ≤CrNiMo
3040.080.752.000.0450.03018.0-20.08.0-10.5–
304L0.030.752.000.0450.03018.0-20.08.0-12.0–
3160.080.752.000.0450.03016.0-18.010.0-14.02.0-3.0
316L0.030.752.000.0450.03016.0-18.010.0-14.02.0-3.0

Composition per ASTM A312.

Mechanical Properties (at Room Temperature)
GradeTensile Strength (MPa) minYield Strength (MPa) minElongation (%) minHardness (HB) max
30451520535201
304L48517035201
31651520535217
316L48517035217

Tested in accordance with ASTM E8 / E8M.

Key Features

ASTM A312 Compliant – Meets strict international standards
Cost-Effective – Lower cost than seamless pipe
Large Diameter – Available up to 48″ (1219 mm)
Annealed After Welding – Restores corrosion resistance
100% Hydrostatic Tested – Per ASTM A312 requirements
Consistent Wall Thickness – High dimensional accuracy
Wide Grade Selection – 304L, 316L, 321, 347, 310S
Good Weldability – Easy to join with standard methods

Dimensional Tolerances (ASTM A312)
ParameterTolerance
Outer diameter±0.4 mm for OD ≤ 48.3 mm; ±0.8% for larger
Wall thickness±12.5%
Length (fixed)+0 / -3 mm
Straightness0.2% of total length
Schedule Wall Thickness (ASME B36.19)
NPS (inch)OD (mm)Schedule 5S (mm)Schedule 10S (mm)Schedule 40S (mm)
1/2″21.31.652.112.77
1″33.41.652.773.38
2″60.31.652.773.91
4″114.31.653.056.02
6″168.31.653.407.11
8″219.11.653.768.18
Applications

Chemical & Petrochemical
Process piping systems
Heat exchanger shells
Utility water and steam lines

Food & Beverage
Dairy process lines
Brewery transfer lines
Sanitary utility systems

Pharmaceutical
Purified water distribution
Clean steam lines

Water Treatment
Potable water systems
Reverse osmosis feed lines

Power Generation
Cooling water lines
Low-pressure steam lines

Oil & Gas
Utility water systems
Fire protection mains

Welded vs. Seamless Comparison
PropertyWelded (ASTM A312)Seamless (ASTM A312)
CostLowerHigher (30-50%)
Max Diameter48″ (1219 mm)24″ (610 mm)
Weld SeamPresent – NDT verifiedNone
High Pressure ServiceModerateHigh
AvailabilityStock sizes widely availableLonger lead times

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For inquiries, technical datasheets, or custom sizes, please contact our sales team.

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