TOBO STEEL GROUP CHINA
| Ends | Plain/Bevelled |
| Thickness | 0.5mm - 25mm |
| Third Party Inspection | BV,SGS,ASP |
| Payment Terms | T/T,Western Union |
| Finishing | Solution Annealed & Pickled |
| Cross Section | annular |
| 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 |
| 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 |
| Processing Service | Bending, Welding, Cutting |
| Standard | ASTM A312, A213, A269, A554 |
| Model Number | Stainless Steel Seamless Pipe |
| Brand Name | TOBO |
| Certification | ISO/TUV/SGS |
| Place of Origin | Shanghai,China |
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Product Specification
| Ends | Plain/Bevelled | Thickness | 0.5mm - 25mm |
| Third Party Inspection | BV,SGS,ASP | Payment Terms | T/T,Western Union |
| Finishing | Solution Annealed & Pickled | Cross Section | annular |
| 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 | 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 |
| Processing Service | Bending, Welding, Cutting | Standard | ASTM A312, A213, A269, A554 |
| Model Number | Stainless Steel Seamless Pipe | Brand Name | TOBO |
| Certification | ISO/TUV/SGS | Place of Origin | Shanghai,China |
| High Light | Pickled & Annealed Stainless Steel Seamless Pipe ，ASTM A312 TP316L SCH40 Pipe ，Corrosion-Resistant Stainless Steel Tube | ||
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
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) |
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.
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).
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.
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.
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.
Company Details
Business Type:
Manufacturer,Agent,Importer,Exporter,Trading Company,Seller
Year Established:
1998
Total Annual:
100000-100000000
Employee Number:
200~300
Ecer Certification：
Verified Supplier
TOBO GROUP sales head offce in Shanghai. We are one of the Professional manufacturers Exporter Pipeline products in China .Our company was established in 1998, the plant covers 550, 000 square meters and a construction area ... TOBO GROUP sales head offce in Shanghai. We are one of the Professional manufacturers Exporter Pipeline products in China .Our company was established in 1998, the plant covers 550, 000 square meters and a construction area ...
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