Stainless Steel 317L U Tubes, 317 Stainless Steel U Tube Manufacturer, SS 317 U Tube Supplier, SS 317 U Tube Exporter, Stainless Steel 317 Precision Tubing, SS 317 Small Diameter Tube ,SS 317 U Tubes
Sumer Metal Industries Private Limited manufactures, supplies and exports premium Stainless Steel 317L U-Tubes engineered for demanding heat-exchanger, petrochemical and process-industry applications. Our 317L U-tubes are produced from low-carbon, molybdenum-bearing austenitic stainless steel that delivers superior resistance to pitting and crevice corrosion in chloride-containing and acidic environments — making them ideal where 304/316 grades may be marginal. We supply mill-certified material, full traceability, and fabrication options (annealed, pickled, cold-drawn) to meet project and OEM requirements.
As a global exporter, Sumer Metal Industries ships 317L U-tubes to customers across Oman, Qatar, Saudi Arabia, the UAE, Kuwait, Spain, Germany, the USA, Canada and several regions across Africa — offering export documentation (COO, commercial invoice, packing list, material test certificates) and logistics support for sea/air shipments. We also provide supply-chain services such as heat-treatment certification, third-party inspection (TPI), and customized packaging for long-distance transit. (Export destinations listed match your request.)
317L is the low-carbon version of grade 317; the “L” minimizes sensitization during welding and reduces the risk of intergranular corrosion after thermal exposure. Compared with 316/316L, 317L contains higher chromium, nickel and molybdenum, which increases resistance to chloride pitting and offers better performance in many aggressive chemical environments and at elevated temperatures. That makes 317L U-tubes a common choice for FGD systems, chemical processing, paper & pulp, and heat exchangers handling acidic streams.
We manufacture U-tubes to relevant pipe & tube standards (commonly ASTM A312 / A213 / A269 for tubing and ASME/ASTM A240 for plate reference where applicable) and provide options for seamless or welded construction depending on application and size. Surface finishes offered include mill annealed (BA), pickled & passivated (1D/2B equivalent surface), and bright drawn finishes for applications where flow or cleanliness matters. Typical testing includes PMI/chemical analysis, tensile testing, and NDT upon request.
Specification of Stainless Steel 317L U Tubes
| Product | Stainless Steel 317L U-Tubes (U-bend tubes for heat exchangers) |
|---|---|
| Material Grade | 317L / AISI 317L — UNS S31703 — EN 1.4438 |
| Standards | ASTM A312 / A213 / A269 (tubing); ASME/ASTM A240 reference; EN 10088 series |
| Manufacture | Seamless or welded (ERW) tubes — cold drawn / annealed per order |
| Typical Surface Finishes | Mill annealed (BA), Pickled & Passivated, Bright Drawn (1D/2B equivalents available) |
| Common Applications | Heat exchangers, chemical process equipment, FGD systems, petrochemical, pulp & paper, flue gas systems |
| Certifications | EN 10204 / 3.1 MTC (mill test certificate), PMI/chemical analysis, TPI available on request |
| Supply Forms | Straight tubes, U-bent tubes (single/multi bend), cut-to-length, custom packing for export |
| Packing & Shipping | Wooden crates/ply bundles, rust preventive, sea/airworthy packing, export docs (COO, invoice, packing list) |
Quality and dimensions are key for U-tube bundles; we offer a wide range of outer diameters (OD) and wall thicknesses to suit tube sheet drilling patterns and thermal-stress requirements. Our tubes can be supplied cut to length, U-bent (single or multi-bend), or supplied straight for field forming — with bend radii and end-preparations per buyer specifications. We also offer custom packaging, bundling, and rust-preventive greasing for export consignments.
Chemical Composition of Stainless Steel 317L U Tubes
| Element | Typical Range (wt%) |
|---|---|
| Carbon (C) | ≤ 0.03 |
| Chromium (Cr) | 18.0 – 20.0 |
| Nickel (Ni) | 11.0 – 15.0 |
| Molybdenum (Mo) | 3.0 – 4.0 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.03 |
| Nitrogen (N) | ≤ 0.10 (varies by spec) |
| Iron (Fe) | Balance |
With a proven track record as a Stainless Steel 317L U Tubes exporter in over 30 countries, Sumer Metal Industries ensures global availability, third-party inspection support, and client-specific customization. Our wide export network combined with strict quality standards has made us a preferred choice for SS 317 tubing worldwide.
Specification of Stainless Steel 317L U Tubes
| Product | Stainless Steel 317L U-Tubes (U-bend tubes for heat exchangers) |
|---|---|
| Material Grade | 317L / AISI 317L — UNS S31703 — EN 1.4438 |
| Standards | ASTM A312 / A213 / A269 (tubing); ASME/ASTM A240 reference; EN 10088 series |
| Manufacture | Seamless or welded (ERW) tubes — cold drawn / annealed per order |
| Typical Surface Finishes | Mill annealed (BA), Pickled & Passivated, Bright Drawn (1D/2B equivalents available) |
| Common Applications | Heat exchangers, chemical process equipment, FGD systems, petrochemical, pulp & paper, flue gas systems |
| Certifications | EN 10204 / 3.1 MTC (mill test certificate), PMI/chemical analysis, TPI available on request |
| Supply Forms | Straight tubes, U-bent tubes (single/multi bend), cut-to-length, custom packing for export |
| Packing & Shipping | Wooden crates/ply bundles, rust preventive, sea/airworthy packing, export docs (COO, invoice, packing list) |
🏭 Industry & Application
- ✅ SS 317 U Tubes for Medical Industry
- ✅ SS 317 U Tubes for Chemical Processing
- ✅ SS 317 Tubes for U Lines
- ✅ Stainless Steel 317L U Tubes for Gas & Liquid Flow
- ✅ SS 317 Tubes for Heat Exchangers
❓ Frequently Asked Questions (FAQs)
Q1:What is Stainless Steel 317L U-Tube used for?
317L U-tubes are used in heat exchangers, chemical process equipment and flue gas desulfurization systems where enhanced resistance to chloride pitting and acidic corrosion is required.
Q2:How does 317L compare with 316L for U-tube applications?
317L contains higher chromium, nickel and molybdenum than 316L, giving it superior resistance to pitting and crevice corrosion in chloride-rich and acidic environments — useful where 316L would be marginal.
Q3:What certifications and documentation are supplied with 317L U-tubes?
Typical exports include Mill Test Certificates (EN 10204/3.1), material chemical reports, dimension certificates and, on request, third-party inspection and PMI reports.
Stainless Steel 317L U Tubes exporter
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At Sumer Metal Industries Pvt. Ltd., we follow a zero-defect policy by implementing stringent quality checks, using certified raw materials, and continuously improving our processes to deliver reliable and consistent tubing solutions
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