TORICH INTERNATIONAL LIMITED
| Payment Terms | L/C,D/A,D/P,T/T,Western Union,MoneyGram |
| Supply Ability | 500 Tons per month |
| Delivery Time | 4-8 Weeks |
| Packaging Details | standard export packing or as required |
| Material | Austenitic stainless steel |
| Standard | ASTM A270, ASTM A269, ASTM A312, EN 10217-7, JIS G3447 / G3459, GB/T 12771 / GB/T 13296 |
| Grades | 304, 304L, 316, 316L, 321; 201 / 202 available for non-hygienic decorative or structural use |
| Outside Diameter | 6 mm–304.8 mm for ASTM A270 sanitary tubing; larger sizes available for industrial welded pipe |
| Wall Thickness | 0.5–8.0 mm typical; 1.24–3.81 mm common for sanitary tubing |
| Length | 1–12 m, customized; common lengths: 4000 mm, 5800 mm, 6000 mm, 12000 mm |
| Tolerance Range | OD tolerance according to ordered standard; wall thickness tolerance commonly ±10% or max. 12.5% depending on specification |
| Heat Treatment | Solution annealed or inline hydrogen bright annealed; rapid quenching after annealing |
| Brand Name | TORICH |
| Model Number | Polished Welded Stainless Steel Tubing |
| Certification | ISO9001 ISO14001 TS16949 |
| Place of Origin | Zhejiang China |
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Product Specification
| Payment Terms | L/C,D/A,D/P,T/T,Western Union,MoneyGram | Supply Ability | 500 Tons per month |
| Delivery Time | 4-8 Weeks | Packaging Details | standard export packing or as required |
| Material | Austenitic stainless steel | Standard | ASTM A270, ASTM A269, ASTM A312, EN 10217-7, JIS G3447 / G3459, GB/T 12771 / GB/T 13296 |
| Grades | 304, 304L, 316, 316L, 321; 201 / 202 available for non-hygienic decorative or structural use | Outside Diameter | 6 mm–304.8 mm for ASTM A270 sanitary tubing; larger sizes available for industrial welded pipe |
| Wall Thickness | 0.5–8.0 mm typical; 1.24–3.81 mm common for sanitary tubing | Length | 1–12 m, customized; common lengths: 4000 mm, 5800 mm, 6000 mm, 12000 mm |
| Tolerance Range | OD tolerance according to ordered standard; wall thickness tolerance commonly ±10% or max. 12.5% depending on specification | Heat Treatment | Solution annealed or inline hydrogen bright annealed; rapid quenching after annealing |
| Brand Name | TORICH | Model Number | Polished Welded Stainless Steel Tubing |
| Certification | ISO9001 ISO14001 TS16949 | Place of Origin | Zhejiang China |
| High Light | bright annealed stainless steel tubing ，annealed stainless steel tubing | ||
This polished welded stainless steel tubing is designed for clean fluid transfer lines where corrosion resistance, smooth surface finish, weld integrity, and dimensional consistency are critical. For foodstuff and hygienic service, ASTM A270 is the preferred reference because it covers seamless, welded, and heavily cold-worked welded stainless sanitary tubing with special surface finish requirements for dairy and food applications. For general corrosion-resistant tubing, ASTM A269 may also be specified, while ASTM A312 or EN 10217-7 can be used when pressure piping requirements apply.
| Item | Typical Supply Range |
|---|---|
| Material | Austenitic stainless steel |
| Standard | ASTM A270, ASTM A269, ASTM A312, EN 10217-7, JIS G3447 / G3459, GB/T 12771 / GB/T 13296 |
| Grades | 304, 304L, 316, 316L, 321; 201 / 202 available for non-hygienic decorative or structural use |
| Outside Diameter | 6 mm-304.8 mm for ASTM A270 sanitary tubing; larger sizes available for industrial welded pipe |
| Wall Thickness | 0.5-8.0 mm typical; 1.24-3.81 mm common for sanitary tubing |
| Length | 1-12 m, customized; common lengths: 4000 mm, 5800 mm, 6000 mm, 12000 mm |
| Tolerance Range | OD tolerance according to ordered standard; wall thickness tolerance commonly ±10% or max. 12.5% depending on specification |
| Straightness | ≤1.5 mm/m typical for precision welded tubing |
| Surface Condition | Bright annealed, pickled, polished, mirror polished; ID/OD polishing available |
| Heat Treatment | Solution annealed or inline hydrogen bright annealed; rapid quenching after annealing |
| Characteristic | Technical Description |
|---|---|
| Surface roughness control | Sanitary polished tubing can be supplied with ID Ra ≤0.8 μm; mechanically polished A270 tubing may reach ID Ra ≤0.5 μm when specified. |
| Bright annealed finish | Hydrogen bright annealing at approximately 1040°C minimum followed by rapid quenching helps restore corrosion resistance and maintain a clean, bright surface. |
| Corrosion resistance | 304 / 304L provides general food and water corrosion resistance; 316 / 316L adds 2.00-3.00% Mo for improved chloride and cleaning-chemical resistance. |
| Welded tube consistency | Welded tubing provides stable OD, wall thickness, and polished appearance for fluid transfer lines, frames, and hygienic assemblies. |
| Low-carbon grades | 304L and 316L reduce sensitization risk after welding because carbon is limited to 0.035% max under ASTM tubing specifications. |
| Buyer Concern | Practical Solution |
|---|---|
| "Will the inner surface be clean enough for food or dairy lines?" | We define surface roughness at quotation stage, such as ID Ra ≤0.8 μm or ID Ra ≤0.5 μm, instead of only saying "polished". Surface inspection and roughness reports can be supplied when required. |
| "Can the welded seam resist leakage and deformation during installation?" | Tubes can be supplied with eddy-current testing, hydrostatic testing, flattening testing, and visual weld inspection according to the selected standard. ASTM A269 includes mechanical test requirements such as flaring, flange, hardness, and reverse flattening tests. |
| "How do I choose between 304L and 316L?" | For neutral food fluids and dry indoor systems, 304L is usually cost-effective. For chloride cleaning agents, brine, coastal environments, or aggressive process fluids, 316L is recommended because of its Mo content. |
| Standard System | Applicable Standard | Scope |
|---|---|---|
| ASTM | ASTM A270 | Sanitary stainless steel tubing for dairy, food, and pharmaceutical-quality service when specified |
| ASTM | ASTM A269 | Seamless and welded austenitic stainless tubing for general corrosion-resisting and low/high-temperature service |
| ASTM | ASTM A312 | Seamless, welded, and heavily cold-worked austenitic stainless steel pipe for high-temperature and corrosive service |
| EN | EN 10217-7 | Welded stainless steel tubes for pressure purposes |
| JIS | JIS G3447 / JIS G3459 | Stainless sanitary pipes / stainless steel pipes |
| GB | GB/T 12771 / GB/T 13296 | Welded stainless steel pipes / seamless stainless steel tubes for fluid transport |
Foodstuff processing: polished 316L welded stainless steel tubing for pasteurized milk transfer lines in dairy plants.
| Grade | UNS | C max % | Mn max % | Si max % | P max % | S max % | Cr % | Ni % | Mo % | Other |
|---|---|---|---|---|---|---|---|---|---|---|
| TP304 | S30400 | 0.08 | 2.00 | 0.75 | 0.045 | 0.030 | 18.0-20.0 | 8.0-11.0 | -- | -- |
| TP304L | S30403 | 0.035 | 2.00 | 0.75 | 0.045 | 0.030 | 18.0-20.0 | 8.0-13.0 | -- | -- |
| TP316 | S31600 | 0.08 | 2.00 | 0.75 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.00-3.00 | -- |
| TP316L | S31603 | 0.035 | 2.00 | 0.75 | 0.045 | 0.030 | 16.0-18.0 | 10.0-15.0 | 2.00-3.00 | -- |
| TP321 | S32100 | 0.08 | 2.00 | 0.75 | 0.045 | 0.030 | 17.0-19.0 | 9.0-12.0 | -- | Ti = 5 × (C+N) to 0.70% |
| Grade | Tensile Strength min. MPa | Yield Strength min. MPa | Elongation min. % | Typical Heat Treatment |
|---|---|---|---|---|
| TP304 | 515 | 205 | 35 | Solution annealed / bright annealed |
| TP304L | 485 | 170 | 35 | Solution annealed / bright annealed |
| TP316 | 515 | 205 | 35 | Solution annealed / bright annealed |
| TP316L | 485 | 170 | 35 | Solution annealed / bright annealed |
| TP321 | 515 | 205 | 35 | Solution annealed / bright annealed |
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller
Year Established:
1997
Total Annual:
25000000-30000000
Employee Number:
100~200
Ecer Certification：
Verified Supplier
A Professional Steel Pipes Materials Inventor, Manufacturer And Solution Provider TORICH INTERNATIONAL LIMITED is a professional inventor, manufacturer, and solution provider of steel pipe materials, integrating production and international trade, specializing in various precision steel pipes. Esta... A Professional Steel Pipes Materials Inventor, Manufacturer And Solution Provider TORICH INTERNATIONAL LIMITED is a professional inventor, manufacturer, and solution provider of steel pipe materials, integrating production and international trade, specializing in various precision steel pipes. Esta...
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