TORICH INTERNATIONAL LIMITED
| Payment Terms | L/C,D/A,D/P,T/T,Western Union |
| Supply Ability | 60000 Ton/Tons per Year |
| Delivery Time | 20-30days upon products |
| Packaging Details | In bundles or in wooden boxes. |
| Application | Precision equipment |
| Standard | ASTM,DIN,GB,JIS,API |
| Outer diameter(round) | 30 - 325 mm |
| Thickness | 2 - 50 mm, |
| Technique | Cold Drawn,Hot Rolled,Cold Rolled,ERW,Hot Rolled/Cold Drawn |
| Surface treatment | Galvanized,customerized,Copper Coated,Null,polished |
| Grade | TP304L TP316L TP317L TP321 TP347 |
| Length | 6M or as requirement,As customer's require,8m,5.8m,2.5-8m |
| Brand Name | TORICH |
| Model Number | ASTM A312 TP317L |
| Certification | ISO9001 ISO 14001 TS16949 |
| Place of Origin | Zhejiang/China |
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Product Specification
| Payment Terms | L/C,D/A,D/P,T/T,Western Union | Supply Ability | 60000 Ton/Tons per Year |
| Delivery Time | 20-30days upon products | Packaging Details | In bundles or in wooden boxes. |
| Application | Precision equipment | Standard | ASTM,DIN,GB,JIS,API |
| Outer diameter(round) | 30 - 325 mm | Thickness | 2 - 50 mm, |
| Technique | Cold Drawn,Hot Rolled,Cold Rolled,ERW,Hot Rolled/Cold Drawn | Surface treatment | Galvanized,customerized,Copper Coated,Null,polished |
| Grade | TP304L TP316L TP317L TP321 TP347 | Length | 6M or as requirement,As customer's require,8m,5.8m,2.5-8m |
| Brand Name | TORICH | Model Number | ASTM A312 TP317L |
| Certification | ISO9001 ISO 14001 TS16949 | Place of Origin | Zhejiang/China |
| High Light | ASTM A312 TP317L Stainless Steel Precision Seamless Pipe ，Enhanced Chloride Corrosion Resistance Austenitic Stainless Steel Pipe ，Low Carbon for Weld Integrity Precision Seamless Tube | ||
ASTM A312 TP317L is a low-carbon, molybdenum-alloyed austenitic stainless steel seamless pipe designed for high-temperature and general corrosive service. It is typically selected when 316L is not sufficient for chloride-bearing or acidic environments, thanks to its higher Mo and Ni content and improved pitting/crevice corrosion resistance.
Product type: Precision seamless austenitic stainless steel pipe (SML)
Standard: ASTM A312 / A312M (ASME equivalent: SA-312 for code applications)
Size system: NPS per ANSI B36.19 (other dimensions can be supplied if compliant)
Length (typical): Random lengths up to 24 ft for many common sizes (cut lengths available by agreement)
Delivery condition: Solution heat treated (annealed) as required by ASTM A312
Testing: Each pipe is subject to hydrostatic or nondestructive electric test, plus required mechanical testing (per standard)
Enhanced chloride corrosion resistance: TP317L is a higher-molybdenum austenitic grade, commonly chosen for improved pitting/crevice corrosion performance vs. 316L in chloride exposure.
Low carbon for weld integrity: The “L” grade helps reduce sensitization risk and supports reliable weld performance in corrosive service.
Precision seamless construction: Seamless manufacturing avoids weld seam risks and is preferred for critical pressure/corrosion applications.
1) “Can you prove compliance and traceability?”
Yes. We provide full inspection documentation (heat/lot traceability, chemistry, and mechanical results). ASTM A312 references mandatory mechanical testing and compliance requirements, and the standard requires documented testing/verification.
2) “How do you ensure leak-tightness and defect control?”
Every pipe is supplied with hydrostatic or nondestructive electric testing per ASTM A312/A999 practices, minimizing the risk of through-wall defects before shipment.
3) “Will it actually resist my chloride/acid media better than 316L?”
TP317L is specifically positioned for more aggressive corrosion conditions. Reputable alloy references highlight superior chloride pitting/general corrosion resistance compared with 304/316 families due to higher alloying levels.
| Grade (UNS) | C | Mn | P | S | Si | Cr | Ni | Mo | Ti | Nb+Ta |
|---|---|---|---|---|---|---|---|---|---|---|
| TP304L (S30403) | ≤0.035 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | 18.0–20.0 | 8.0–13.0 | — | — | — |
| TP316L (S31603) | ≤0.035 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | 16.0–18.0 | 10.0–14.0 | 2.00–3.00 | — | — |
| TP317L (S31703) | ≤0.035 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | 18.0–20.0 | 11.0–15.0 | 3.0–4.0 | — | — |
| TP321 (S32100) | ≤0.08 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | 17.0–19.0 | 9.0–12.0 | — | per note* | — |
| TP347 (S34700) | ≤0.08 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | 17.0–19.0 | 9.0–13.0 | — | — | per note** |
| Grade | Tensile Strength (min) | Yield Strength (min) |
|---|---|---|
| TP304L | 70 ksi (485 MPa) | 25 ksi (170 MPa) |
| TP316L | 70 ksi (485 MPa) | 25 ksi (170 MPa) |
| TP317L | 75 ksi (515 MPa) | 30 ksi (205 MPa) |
| TP321 (seamless) | 75/30 (t ≤ 3/8 in.); 70/25 (t > 3/8 in.) | per thickness above |
| TP347 | 75 ksi (515 MPa) | 30 ksi (205 MPa) |
ASTM / ASME: ASTM A312 / A312M (ASME SA-312 equivalent for code use)
EN: EN 10216-5 (seamless stainless tubes for pressure purposes)
GOST: GOST 9941 (seamless corrosion-resistant stainless pipes, commonly referenced in CIS)
JIS: JIS G 3459 (stainless steel pipes; seamless and welded manufacturing covered)
GB: GB/T 14976 (Seamless stainless steel pipes for fluid transport; latest edition published 2025-08-01, effective 2026-02-01)
Chemical & petrochemical processing: process piping, acid/chloride service lines, corrosive transfer lines
Pulp & paper: bleaching chemical lines and chloride-bearing process systems
Marine / desalination & water treatment: chloride-rich fluid handling where enhanced pitting resistance is required
High-temperature & general corrosive service piping: plant piping requiring A312 compliance and seamless reliability
A: manufacturer,also can do trading.
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock,
it is according to quantity.
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
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
Company Overview A Professional Steel Tube Manufacturer and Solution Provider TORICH INTERNATIONAL LIMITED integrates steel tube manufacturing, international trade, warehousing, technical support and customized processing. Our manufacturing operations cover cold drawing, cold rolling, heat treat... Company Overview A Professional Steel Tube Manufacturer and Solution Provider TORICH INTERNATIONAL LIMITED integrates steel tube manufacturing, international trade, warehousing, technical support and customized processing. Our manufacturing operations cover cold drawing, cold rolling, heat treat...
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