TOBO STEEL GROUP CHINA
| Material | Stainless Steel |
| Outside Diameter | 6.35- 152mm |
| Thickness | 1.5 - 30 mm |
| Applications | Oil & Gas, Chemical, Food Processing, Construction |
| Payment Terms | T/T,Western Union |
| Term Name | Stainless Steel Pipe |
| Ndt | ET/HT |
| Certifications | ISO/EN 10204 Type 3.1 / 3.2 available |
| Wallthicknessrange | 0.5mm to 40mm |
| Supply Ability | 10 Ton/Month |
| Product Name | Stainless Steel Seamless Pipe ASTM A312 304 304L 316 316L Seamless Tube SCH40 Industrial Pipe |
| Techinque | Cold Drawn |
| Material Grade | ASTM A312 TP3156H |
| Surface Treatment | High Polished,Pickling |
| Delivery Time | 15-30 Workdays |
| Loading Port | Ningbo port, \Tianjin Port |
| Packaging Details | Standard Shipping Package |
| Face | FF,RF ,RTJ |
| Section Shap | Round |
| Specification | 0.3*1200*1500 |
| Model Number | Stainless Steel Seamless Pipe |
| Brand Name | TOBO |
| Certification | ISO/TUV/SGS |
| Place of Origin | Shanghai,China |
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Product Specification
| Material | Stainless Steel | Outside Diameter | 6.35- 152mm |
| Thickness | 1.5 - 30 mm | Applications | Oil & Gas, Chemical, Food Processing, Construction |
| Payment Terms | T/T,Western Union | Term Name | Stainless Steel Pipe |
| Ndt | ET/HT | Certifications | ISO/EN 10204 Type 3.1 / 3.2 available |
| Wallthicknessrange | 0.5mm to 40mm | Supply Ability | 10 Ton/Month |
| Product Name | Stainless Steel Seamless Pipe ASTM A312 304 304L 316 316L Seamless Tube SCH40 Industrial Pipe | Techinque | Cold Drawn |
| Material Grade | ASTM A312 TP3156H | Surface Treatment | High Polished,Pickling |
| Delivery Time | 15-30 Workdays | Loading Port | Ningbo port, \Tianjin Port |
| Packaging Details | Standard Shipping Package | Face | FF,RF ,RTJ |
| Section Shap | Round | Specification | 0.3*1200*1500 |
| 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 ，304L 316L Seamless Tube SCH40 ，Industrial Stainless Steel Seamless Pipe | ||
Stainless Steel Seamless Pipe ASTM A312 304 304L 316 316L Seamless Tube SCH40 Industrial Pipe
1.Product Description
Stainless steel seamless pipe is manufactured by heating solid stainless steel billets, piercing them into hollow shells through a piercing mill, and then subjecting them to multiple passes of cold drawing, cold rolling, or hot extrusion for diameter and wall thickness reduction. The process is completed with solution heat treatment and finishing operations. The defining feature is the absence of any welded interface throughout the pipe body, resulting in a dense and uniform microstructure with controlled grain size. Our product range covers austenitic, duplex, and nickel-based alloy series, with dimensional accuracy reaching precision grade (OD tolerance within ±0.05mm). Various surface finishes are available upon request, including pickled, polished, or bright-annealed conditions.
2. Product Applications
This product is designed for medium-to-high-end industrial sectors with stringent requirements for material integrity, corrosion resistance, and cleanliness. Typical applications include:
Downhole tool strings and surface high-pressure gathering pipelines in oil and gas extraction
Secondary and tertiary feedwater lines and steam generator heat transfer tubes in nuclear power plants
Chloride-resistant piping for seawater desalination projects
High-purity process gas/chemical delivery lines in semiconductor and photovoltaic industries
Superheater and reheater tubes for supercritical thermal power units
Sanitary pipelines for biopharmaceutical and sterile water-for-injection systems
Precision hydraulic cylinder barrels and high-fatigue-life mechanical bushings
3. Product Advantages
Life-cycle cost advantage: The weld-free structure eliminates potential initiation sites for intergranular corrosion and stress corrosion cracking, significantly extending equipment maintenance intervals and reducing overall life-cycle operating costs.
Isotropic mechanical properties: Since the material flow lines align with the loading direction, the longitudinal and transverse mechanical properties remain uniform without the performance degradation caused by weld heat-affected zones.
Superior dimensional accuracy and roundness: Precision cold-rolling processes yield minimal OD ovality and wall thickness deviations, meeting assembly requirements with high fit tolerances.
Excellent surface quality: Internal surface roughness (Ra) can be controlled below 0.8μm, effectively reducing fluid flow friction resistance while preventing medium retention and bacterial growth.
Wide temperature-range adaptability: Maintains stable microstructure and mechanical properties from cryogenic conditions at -196°C up to high-temperature environments at 850°C, suitable for extreme temperature differential applications.
High cleanliness: After solution annealing and pickling, both internal and external surfaces are free of scale and harmful inclusions, meeting ultra-pure medium transmission requirements.
4.Key Product Parameters
| Parameter Category | Specification / Description |
| Nominal OD Range | Cold-drawn/rolled: 6.0mm ~ 426mm; Hot-rolled/extruded: 38mm ~ 660mm |
| Wall Thickness Range | 0.5mm ~ 50mm (ultra-thin and extra-heavy walls available upon negotiation) |
| Length Delivery Condition | Fixed lengths (3m~12m) or random lengths; ends can be threaded or beveled |
| Typical Material Grades | TP304/304L, TP316/316L, TP321, TP347H, S32205, S32750, N06625, etc. |
| Applicable Standards | ASTM A269 (general), ASTM A213 (boiler superheater), ASME SA312, GB/T 13296, NB/T 47019 |
| Dimensional Tolerances (Precision Grade) | OD tolerance: ±0.05mm ~ ±0.10mm; WT tolerance: ±8% ~ ±10% |
| Surface Roughness | Internal surface Ra ≤ 0.8μm (polished condition); external surface Ra ≤ 1.6μm |
| Grain Size | Finer than or equal to Grade 5 (ASTM E112), with no chromium-depleted grain boundaries |
| Non-Destructive Testing (NDT) | 100% Eddy Current Testing (ET) or Ultrasonic Testing (UT); acceptance criteria per ASTM E213/E571 |
| Flattening / Flaring Tests | Flattening to specified gap (typically 4~6 × WT) without cracking; Flaring rate ≥20% without cracking |
| Hydrostatic / Pneumatic Test | Hydrostatic test pressure calculated by P=2St/D (S = allowable stress); hold time ≥10 seconds, zero 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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