Specifications
Model Number :
Stainless Steel Seamless Pipe
Ends :
Plain/Bevelled
Thickness :
0.5mm - 25mm
Brand Name :
TOBO
Third Party Inspection :
BV,SGS,ASP
Payment Terms :
T/T,Western Union
Finishing :
Solution Annealed & Pickled
Cross Section :
annular
Price :
Negotiable
Applications :
oil and gas industry
Supply Ability :
10 Ton/Month
Product Name :
Pickled & Annealed Stainless Steel Seamless Pipe ASTM A312 TP316L SCH40 Corrosion-Resistant Tube
MOQ :
1PC
Delivery Time :
15-30 Workdays
Connection Type :
Butt Weld
Specification :
ASME SB171
Packing :
Standard Seaworthy Packing
Packaging Details :
Standard Shipping Package
Invoicing :
by theoretical weight
Welding Line Type :
ERW
Materal :
Blank or print
Productname :
Stainless Steel Seamless Pipe
Certification :
ISO/TUV/SGS
Place of Origin :
Shanghai,China
Processing Service :
Bending, Welding, Cutting
Standard :
ASTM A312, A213, A269, A554
Description

Pickled & Annealed Stainless Steel Seamless Pipe ASTM A312 TP316L SCH40 Corrosion-Resistant Tube

1.Product Description

This product catalog provides a selection database for stainless steel seamless pipes used in pressure piping systems, designed in accordance with major international design codes (ASME B31.3, EN 13480, GB/T 20801). It covers five major material categories: austenitic (304/316 series), stabilized (321/347), heat-resistant (304H/347H), duplex (2205/2507), and super-austenitic (904L/254SMO). Each material is accompanied by essential engineering design parameters, including temperature-pressure ratings, allowable stresses, coefficients of thermal expansion, and thermal conductivity. This document is intended to assist design institutes, engineering companies, and end-users in completing material selection and preliminary wall thickness calculations at the project front-end, thereby improving design efficiency and controlling procurement costs.

2. Product Applications

Service Condition Recommended Grades (Priority Order) Key Selection Basis
Ambient temp/pressure, non-corrosive water/gas 304 → 304L → 316 Lowest cost; 304L offers better sensitization resistance
Moderate corrosion (dilute acids, weak alkalis, ≤60℃) 316L → 316 → 304L Molybdenum enhances pitting resistance
High-temp steam/boilers (≤650℃) 347H → 304H → 321 Stabilized + fine grain for creep resistance
Chloride/seawater service (ambient) 2205 → 2507 → 904L Duplex best resists Cl⁻ stress corrosion cracking
Strong oxidizing acids (hot concentrated H₂SO₄) 254SMO → 904L → 316L High Ni/Mo for general corrosion resistance
Cryogenic (LNG, -162℃) 304L → 316L Austenitic retains excellent toughness, no brittle transition
High-purity/clean media (pharma, electronics) 316L (EP grade) → 304L (BA grade) Extremely low internal surface roughness required

3. Product Advantages

  1. Life-Cycle Cost (LCC) advantage: Although the initial purchase price of seamless pipes is higher than that of welded pipes of the same specification, the elimination of weld-related corrosion and fatigue failure risks reduces maintenance frequency by 50%~70% under high-temperature, high-pressure, and corrosive services. The total 20-year cost (procurement + installation + operation & maintenance + downtime losses) is generally lower than that of welded pipes. See comparison table below:

    Comparison Item Seamless Pipe Welded Pipe (same grade)
    Initial purchase price Base +20%~40% Base
    Number of field welds Fewer (longer tube lengths) More (length-limited)
    Inspection/maintenance interval 8~10 years 3~5 years
    20-year total cost Lower Higher (due to frequent replacement)
  2. Wall thickness reduction potential: As seamless pipes have no weld joint coefficient penalty (weld joint coefficient E=1.0), the required wall thickness calculated per ASME B31.3 can be reduced by approximately 10%~15% compared to welded pipes (E=0.85). This directly lowers material weight and procurement costs while reducing pipe support loads.

  3. Supply chain flexibility: Non-standard OD and WT combinations (e.g., special schedules beyond ANSI) are available to match existing fittings in revamp projects, with delivery times shortened to 4~6 weeks (2 weeks for standard stocked sizes).

  4. Digital selection tool support: An Excel-based allowable stress lookup table and automatic wall thickness calculation template can be provided with the shipment, enabling quick strength verifications and reducing manual chart-reading errors.

  5. Broad stocking range: Regular inventory covers DN15~DN600 across all schedules (SCH10S to SCH160), meeting over 90% of common engineering demands, with emergency shipments possible within 24 hours.

Pickled & Annealed Stainless Steel Seamless Pipe ASTM A312 TP316L SCH40 Corrosion-Resistant Tube

4.​Key Product Parameters

Parameter 304/L 316/L 321 347H 2205 904L
Maximum continuous 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
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 Temperature (CPT, ℃, in 6%FeCl₃) <10 20 15 20 45 65
SCC resistance (in Cl⁻ environments) Poor Medium Medium Medium Excellent Good
Common wall thickness schedules SCH10S~SCH160, with non-standard options available
Minimum cold bending radius 3.5×OD (hot bending or sand-filled cold bending recommended)
Recommended filler metal ER308(L) ER316(L) ER321 ER347 ER2209 ER385

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.

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Pickled & Annealed Stainless Steel Seamless Pipe ASTM A312 TP316L SCH40 Corrosion-Resistant Tube

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Model Number :
Stainless Steel Seamless Pipe
Ends :
Plain/Bevelled
Thickness :
0.5mm - 25mm
Brand Name :
TOBO
Third Party Inspection :
BV,SGS,ASP
Payment Terms :
T/T,Western Union
Contact Supplier
video
Pickled & Annealed Stainless Steel Seamless Pipe ASTM A312 TP316L SCH40 Corrosion-Resistant Tube
Pickled & Annealed Stainless Steel Seamless Pipe ASTM A312 TP316L SCH40 Corrosion-Resistant Tube
Pickled & Annealed Stainless Steel Seamless Pipe ASTM A312 TP316L SCH40 Corrosion-Resistant Tube
Pickled & Annealed Stainless Steel Seamless Pipe ASTM A312 TP316L SCH40 Corrosion-Resistant Tube

TOBO STEEL GROUP CHINA

Verified Supplier
12 Years
shanghai, shanghai
Since 1998
Business Type :
Manufacturer, Agent, Importer, Exporter, Trading Company, Seller
Total Annual :
100000-100000000
Employee Number :
200~300
Certification Level :
Verified Supplier
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