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Quality Seamless Stainless Steel Round Pipe ASTM A312 304/304L/316/316L Schedule 10S To XXS factory
Quality Seamless Stainless Steel Round Pipe ASTM A312 304/304L/316/316L Schedule 10S To XXS factory
Quality Seamless Stainless Steel Round Pipe ASTM A312 304/304L/316/316L Schedule 10S To XXS factory

Seamless Stainless Steel Round Pipe ASTM A312 304/304L/316/316L Schedule 10S To XXS

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

Seamless Stainless Steel Round Pipe
Product Summary
Seamless stainless steel round pipe is manufactured without any weld seam, created by extruding a solid billet through a mandrel to form a hollow tube. This process results in a pipe with uniform wall thickness, superior pressure resistance, and excellent structural integrity — making it the ...

Product Details

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Seamless Stainless Steel Round Pipe

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Stainless Steel Round Pipe 304L

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SS Pipe Round ASTM A312
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

Seamless stainless steel round pipe is manufactured without any weld seam, created by extruding a solid billet through a mandrel to form a hollow tube. This process results in a pipe with uniform wall thickness, superior pressure resistance, and excellent structural integrity — making it the preferred choice for high-pressure, high-temperature, and corrosive environments.

Unlike welded pipes, seamless pipes have no weak points along the longitudinal seam, offering reliable performance in critical applications such as chemical processing, oil and gas transportation, power generation, and boiler systems.

Key Benefits:

  • No weld seam eliminates the risk of seam failure
  • Excellent pressure and temperature resistance
  • Uniform wall thickness and consistent mechanical properties
  • Suitable for bending, flanging, and similar forming operations
  • Available in multiple grades (304/304L/316/316L/321/310S, etc.)
Product Specifications
Parameter Details
Product Name Seamless Stainless Steel Round Pipe
Standards ASTM A312, A213, A269, A511, EN 10216-5, JIS G3459, GB/T 14976
Grades 304, 304L, 316, 316L, 316Ti, 321, 310S, 317L, 904L, Duplex 2205
Dimensions 1/2″ – 24″ OD (6mm – 610mm)
Wall Thickness Schedule 10S, 20, 40, 80, 160, XXS (1.0mm – 50mm)
Length 3m – 12m (random, fixed, or custom lengths)
Surface Finish Pickled, Bright Annealed (BA), Polished (Mirror), Turned
Manufacturing Process Hot Rolled / Cold Drawn / Cold Rolled
Available Grades & Standards
Grade Standard Key Characteristics Typical Applications
304 ASTM A312 General-purpose, good corrosion resistance Food processing, dairy, beverage
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 A213 Titanium stabilized, high temperature Exhaust systems, heat exchangers
321 ASTM A213 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 A790 Duplex, high strength + SCC resistance Offshore, desalination
Chemical Composition (%)
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
Mechanical Properties (Typical)
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
Physical Properties
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
Dimensions & Schedule Chart
Standard Pipe Sizes (ANSI B36.19)
NPS (inch) OD (mm) Schedule 10S (mm) Schedule 40S (mm) Schedule 80S (mm)
1/2″ 21.3 2.11 2.77 3.73
3/4″ 26.7 2.11 2.87 3.91
1″ 33.4 2.77 3.38 4.55
1-1/2″ 48.3 2.77 3.68 5.08
2″ 60.3 2.77 3.91 5.54
3″ 88.9 3.05 5.49 7.62
4″ 114.3 3.05 6.02 8.56
6″ 168.3 3.40 7.11 10.97
8″ 219.1 3.76 8.18 12.70
10″ 273.1 4.19 9.27 15.09
12″ 323.9 4.57 10.31 17.48

Custom sizes available upon request

Dimensional Tolerances
Parameter Cold Drawn Hot Rolled
OD Tolerance ±0.1mm (≤50mm); ±0.2% (>50mm) ±0.5mm – ±1.5%
Wall Thickness Tolerance ±10% ±12.5%
Length Tolerance (fixed) +3mm / -0mm +5mm / -0mm
Straightness ≤1.0mm per meter ≤1.5mm per meter
Advantages of Seamless vs. Welded Pipe
Feature Seamless Pipe Welded Pipe
Weld Seam None Present
Pressure Rating Higher Moderate
Uniformity Uniform wall thickness Potential variation at the weld
Corrosion Resistance Uniform throughout The weld area may be susceptible
Size Range Up to 24″ Unlimited (larger sizes)
Cost Higher Lower
Lead Time Longer Shorter
Best For High pressure, high temp, corrosive media General-purpose, low-pressure, large-diameter

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