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    In the latest vendor rating, TOBO won the excellent rating, it is good, will continue to cooperate.
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Heavy Wall Thick Stainless Steel Seamless Pipe ASTM A312 TP316L Large Diameter Seamless Tube

  • Heavy Wall Thick Stainless Steel Seamless Pipe ASTM A312 TP316L Large Diameter Seamless Tube
  • Heavy Wall Thick Stainless Steel Seamless Pipe ASTM A312 TP316L Large Diameter Seamless Tube
  • Heavy Wall Thick Stainless Steel Seamless Pipe ASTM A312 TP316L Large Diameter Seamless Tube
  • Heavy Wall Thick Stainless Steel Seamless Pipe ASTM A312 TP316L Large Diameter Seamless Tube
  • Heavy Wall Thick Stainless Steel Seamless Pipe ASTM A312 TP316L Large Diameter Seamless Tube
Place of Origin Shanghai,China
Brand Name TOBO
Certification ISO/TUV/SGS
Model Number Stainless Steel Seamless Pipe
Minimum Order Quantity 1PC
Price Negotiable
Packaging Details Standard Shipping Package
Delivery Time 15-30 Workdays
Payment Terms T/T,Western Union
Supply Ability 10 Ton/Month
Product Details
Product Name Heavy Wall Thick Stainless Steel Seamless Pipe ASTM A312 TP316L Large Diameter Seamless Tube Surface Pickling Annealed
Execution Standards GB,JIS,ASTM,URS,KS,BS,EN,AS Payment Term T/T, L/C, Western Union, Etc.
External Diameter 6mm-800mm Types Stainless Steel Seamless Pipe / Tube
Purpose Chemical Industry End Cut Plain End ( PE ) / Bevel End ( BE )
Processing Technology Hot Rolled Ndt Eddy Current Or Hydraulic Test
Tolerence +-1% Thickness 0.5-100mm
Material Grade ASME S30400 Ends Plain End (PE), Beveled End (BE)
Supply Capacity 10000tons Inspection 100%
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Product Description

Heavy Wall Thick Stainless Steel Seamless Pipe ASTM A312 TP316L Large Diameter Seamless Tube

 

1.Product Description

This technical data sheet covers austenitic (304/304L, 316/316L), stabilized (321, 347H), duplex (2205, 2507), and super-austenitic (904L) stainless steel seamless pipes manufactured by hot extrusion and cold finishing processes. The pipes are supplied in the solution-annealed and pickled condition, with no longitudinal or helical welds throughout the entire length. Each pipe is 100% non-destructively tested (UT + ET) and accompanied by an EN 10204 Type 3.1 or 3.2 Mill Test Certificate. Dimensional tolerances meet or exceed ASTM A530 / A999 requirements, with precision-grade options available upon request. End finishes include plain, beveled (37.5°±2.5°), or threaded, with rust-preventive oil and plastic end caps as standard.

 

2. Product Applications

These seamless pipes are designed for critical services in the following industries and systems:

  • Oil & gas upstream (downhole tubing, surface flowlines, subsea umbilicals)

  • Refinery and petrochemical high-temperature/high-pressure process piping

  • Power generation – superheater/reheater tubes in coal-fired and combined-cycle plants

  • Nuclear power – secondary/tertiary cooling circuits (seismic-grade)

  • LNG terminals and cryogenic storage (–162°C transfer lines)

  • Desalination and seawater handling (duplex grades for chloride resistance)

  • Pharmaceutical and biotechnology – purified water / WFI distribution (hygienic finishes)

  • Semiconductor and photovoltaic – ultra-high-purity gas and chemical delivery

  • Hydrogen production and refueling stations – high-pressure (350–700 bar) piping

3. Product Advantages

  1. Weld‑free integrity — eliminates weak points, reduces leakage risk, and provides uniform mechanical properties in both longitudinal and transverse directions.

  2. Superior pressure containment — allows higher allowable stresses (joint coefficient E = 1.0 per ASME B31.3) compared to welded pipes, enabling up to 15% wall thickness reduction.

  3. Excellent corrosion resistance — alloy-specific resistance to general corrosion, pitting, crevice corrosion, SCC, and intergranular attack, verified by ASTM A262 practices.

  4. High-temperature creep strength — stabilized grades (347H) offer exceptional creep rupture strength up to 750°C, with 100,000‑hour rupture data available.

  5. Cryogenic toughness — austenitic grades maintain impact energy >60J at –196°C with no ductile‑to‑brittle transition.

  6. Smooth internal surface — Ra ≤ 0.8μm (polished) reduces flow resistance, fouling, and bacterial growth.

  7. Full traceability — each pipe is stamped with heat number and pipe ID, fully integrated into ERP for 30‑minute data retrieval.

  8. Customizable supply — non‑standard ODs, wall thicknesses, and lengths available; certified to ASME, PED, NORSOK, and class society rules.

Heavy Wall Thick Stainless Steel Seamless Pipe ASTM A312 TP316L Large Diameter Seamless Tube

4.​Key Product Parameters

Parameter 304/304L 316/316L 321 347H 2205 904L
OD Range (mm) 6 – 660 6 – 660 6 – 426 6 – 426 10 – 610 10 – 426
WT Range (mm) 0.5 – 60 0.5 – 50 0.5 – 40 0.5 – 40 1.0 – 40 1.0 – 30
Max. Service Temp. (℃) 425 425 650 750 300 400
Allowable Stress @100℃ (MPa) * 115 115 120 135 190 110
Allowable Stress @400℃ (MPa) * 85 85 90 105 — —
Tensile Strength (MPa) min. 520 520 550 550 620 490
Yield Strength (MPa) min. 205 205 205 205 450 220
Elongation (%) min. 40 40 40 35 25 35
Hardness (HB) max. 187 187 187 192 290 220
Coeff. of Expansion (20–400℃) ×10⁻⁶/℃ 17.2 17.5 17.0 17.8 13.5 15.5
Thermal Conductivity @100℃ (W/m·K) 16.2 16.3 16.1 16.5 19.0 13.0
Critical Pitting Temp. (℃, 6%FeCl₃) <10 20 15 20 45 65
SCC Resistance (chlorides) Poor Medium Medium Medium Excellent Good
Intergranular Corrosion (ASTM A262) Practice E Practice E Practice C/E Practice C/E N/A Practice C
NDT Standard UT per ASTM E213, ET per ASTM E571 — 100% coverage          
Hydrostatic Test Calculated per ASME B31.3; hold ≥10s; zero leakage          
Straightness Total bow ≤0.15% of length; ≤3.0mm over any 3m          
OD Tolerance (Precision Grade) ±0.05mm for D<50mm; ±0.5% for D≥50mm          
WT Tolerance ±8% ~ ±10% (precision); ±10% ~ ±12.5% (standard)          
Surface Roughness (internal, polished) Ra ≤0.8μm          
Recommended Filler (GTAW) ER308L ER316L ER321 ER347 ER2209 ER385
PWHT Requirement (WT>10mm) Optional (solution 1050℃) Optional Stabilizing 870–930℃ Stabilizing 900–950℃ Not recommended Not recommended

 

FAQ

1. Are you trading company or manufacturer ? We are manufacturer ,You can see the certification.

2.How long is your delivery time? Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.

3. Do you provide samples ? is it free or extra ? Yes, we could offer the sample for free charge but need pay the cost of freight.

4. What is your terms of payment ? Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.

Tags:

seamless stainless steel tube

marine stainless steel tubing

stainless steel round tube