TOBO STEEL GROUP CHINA
| Grade | 304, 316, 321, 310, 904L, etc. |
| Pipe End | Plain End, Beveled End |
| Payment Terms | T/T,Western Union |
| Mareial | A105&A106 |
| Steel Grade | 309 309S 310S |
| Surface Treatment | Polished |
| Supply Ability | 10 Ton/Month |
| Product Name | Stainless Steel Seamless Pipe ASTM A312 TP304/TP316L Schedule 40 Cold Drawn Seamless Tube |
| Surface | Annealed and Pickling |
| Delivery Time | 15-30 Workdays |
| Manufacturingprocess | Seamless |
| Material Grade | TP304H , TP310H, TP316H, TP321H, TP347H |
| Wallthicknessrange | 0.5mm to 50mm |
| Packaging Details | Standard Shipping Package |
| Width | According to customer needs |
| Tolerance | As per ASTM or customer requirements |
| End Cut | Plain End ( PE ) / Bevel End ( BE ) |
| Inner Diameter | 431.6mm |
| Third Party Inspection | BV,SGS,ASP |
| Length | Customizable, typically 6m or 12m |
| Production Line Type | Seamless |
| Model Number | Stainless Steel Seamless Pipe |
| Brand Name | TOBO |
| Certification | ISO/TUV/SGS |
| Place of Origin | Shanghai,China |
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Product Specification
| Grade | 304, 316, 321, 310, 904L, etc. | Pipe End | Plain End, Beveled End |
| Payment Terms | T/T,Western Union | Mareial | A105&A106 |
| Steel Grade | 309 309S 310S | Surface Treatment | Polished |
| Supply Ability | 10 Ton/Month | Product Name | Stainless Steel Seamless Pipe ASTM A312 TP304/TP316L Schedule 40 Cold Drawn Seamless Tube |
| Surface | Annealed and Pickling | Delivery Time | 15-30 Workdays |
| Manufacturingprocess | Seamless | Material Grade | TP304H , TP310H, TP316H, TP321H, TP347H |
| Wallthicknessrange | 0.5mm to 50mm | Packaging Details | Standard Shipping Package |
| Width | According to customer needs | Tolerance | As per ASTM or customer requirements |
| End Cut | Plain End ( PE ) / Bevel End ( BE ) | Inner Diameter | 431.6mm |
| Third Party Inspection | BV,SGS,ASP | Length | Customizable, typically 6m or 12m |
| Production Line Type | Seamless | Model Number | Stainless Steel Seamless Pipe |
| Brand Name | TOBO | Certification | ISO/TUV/SGS |
| Place of Origin | Shanghai,China | ||
| High Light | Stainless Steel Seamless Pipe ASTM A312 ，TP304 TP316L Seamless Tube ，Cold Drawn Schedule 40 Pipe | ||
Stainless Steel Seamless Pipe ASTM A312 TP304/TP316L Schedule 40 Cold Drawn Seamless Tube
1.Product Description
Stainless steel seamless pipe is a long steel product with a hollow cross-section and no joints around its perimeter, made from metal materials. The manufacturing process employs hot rolling, hot extrusion, or cold drawing (cold rolling) techniques: solid stainless steel billets are heated, pierced, and then rolled or drawn into shape to produce a continuous pipe without any welded seams. By rolling method, it can be classified into hot-rolled, hot-extruded, and cold-drawn (cold-rolled) pipes; by metallographic structure, it includes austenitic, martensitic, ferritic, and duplex stainless steel seamless pipes. The product complies with national standards such as GB/T14976 (for fluid transportation) and GB13296 (for boiler applications), as well as international specifications including ASTM A312/A312M, ASTM A213, JIS G3456, and EN 10216-5.
2. Product Applications
Stainless steel seamless pipes are widely used as industrial pipelines and mechanical structural components in petroleum, chemical, medical, food, light industry, and instrument industries. Specific applications include:
Oil, gas, and chemical industry fluid transmission pipelines
Boiler, heat exchanger, and power generation tubes
Automotive and aerospace hydraulic lines
Hygienic flow systems in pharmaceutical and food processing plants
Marine and offshore pipelines
Building water supply systems, hot water supply, and high-pressure piping
Mechanical parts manufacturing and engineering structural components
Hydrogen energy vehicle pipeline systems
3. Product Advantages
Weld-free structure: The entire pipe has no welded joints, eliminating weak points and providing a uniform structure without stress concentration.
Superior pressure resistance: Capable of withstanding significantly higher pressures than welded pipes, suitable for high-pressure applications.
Excellent corrosion resistance: Resistant to weak corrosive media such as air, steam, and water, as well as chemical corrosive media including acids, alkalis, and salts. Corrosion resistance depends on the content of alloying elements such as chromium, nickel, and molybdenum.
Leak-proof performance: The seamless design ensures minimal leakage risk under high-pressure and high-temperature environments.
High strength and durability: Features high tensile strength and yield strength, with long service life and low maintenance requirements.
Smooth internal surface: Low fluid resistance, resistant to deposit buildup and contamination.
Lightweight: Weighs less than solid steel materials under the same bending and torsional strength requirements.
High-temperature resistance: Suitable for high-temperature thermal environments; certain grades can withstand temperatures up to 800°C and above.
4.Key Product Parameters
| Parameter Category | Range / Description |
| Outside Diameter (OD) | 6mm – 830mm |
| Wall Thickness (WT) | 0.5mm – 60mm |
| Length (L) | Standard 6m, customizable upon request; Hot-rolled: 1.5–10m, Cold-drawn: 1.0–8m |
| Material Grades | 304, 304L, 316, 316L, 321, 310S, 904L, 316Ti, S31803, etc. |
| Applicable Standards | GB/T14976 (fluid transportation), GB/T14975 (structural), GB13296 (boiler), ASTM A312/A312M, ASTM A213, JIS G3456, EN 10216-5, etc. |
| 304 Mechanical Properties | Tensile strength ≥520MPa, Yield strength ≥205MPa, Elongation ≥40%, Hardness ≤187HB |
| 304L Mechanical Properties | Tensile strength ≥450MPa, Elongation ≥40% |
| Theoretical Weight | (OD – WT) × WT × 0.02491 kg/m |
| Density | 7.93 g/cm³ |
| Hydrostatic Test | Standard hydrostatic test pressure 2.45MPa, hold for no less than 5 seconds, no leakage |
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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