Import Best Sell Astm Stainless Steel Thick Walled Pipe — Buy in Bulk from Supplier in China

Jiangsu Longyang Metal Technology Co., Ltd. produces welded stainless steel thick-walled pipe in austenitic and duplex grades including 304, 304L, 316, 316L, 321, 310S, 904L, and 2205. The product range covers outer diameters from 13.7 mm to 2000 mm with wall thicknesses from 0.5 mm to 50 mm and standard lengths of 1 metre to 12 metres or custom-cut dimensions. Manufacturing standards include ASTM A312, A554, A249, A269, and A270 alongside DIN 17456-85, DIN 17458-85, DIN 17459-92, JIS G3446-1994, JIS G3448-1997, JIS G3459-1997, JIS G3463-1994, and GB13296-1991, GB14975-2002, GB14976-2002. Surface finishes span 180g, 320g, and 400g satin or hairline through 400g, 500g, 600g, and 800g mirror polish levels. The supplier reports monthly capacity of 1000 tonnes and offers third-party inspection support through SGS and other agencies.

Material selection for thick-walled stainless pipe depends on service environment: 304/304L suits general corrosion resistance in chemical and food processing, 316/316L adds molybdenum for chloride-exposed applications, 321 offers titanium stabilisation against sensitisation in welded high-temperature service, 310S extends oxidation resistance to approximately 1150°C, 904L provides superior resistance to sulphuric and phosphoric acids, and 2205 duplex delivers roughly twice the yield strength of austenitic grades with excellent stress corrosion cracking resistance. Wall thickness tolerance for welded pipe typically follows ASTM A312 at plus 12.5% / minus 12.5% for nominal wall, though seamless reference standards may apply depending on manufacturing route. Ovality limits, straightness, and length tolerances should be confirmed against the specific standard cited on the mill test certificate for each order.

These pipes serve chemical processing, petrochemical refining, pulp and paper, water treatment, heat exchanger manufacture, shipbuilding, and military applications where pressure containment and corrosion resistance are critical. The thick-walled construction specifically suits high-pressure hydraulic lines, reactor vessels, boiler feed systems, and subsea installations where external pressure or internal pressure cycling demands greater structural margin. Buyers should specify whether pipes are supplied as welded, cold-finished, or further processed. Packaging options include wooden box, wooden frame, or woven cloth with iron sheet binding and plastic end caps. The supplier holds ISO certification and notes third-party inspection availability, though buyers should verify current certificate scope and validity directly.

Jiangsu Longyang Metal Technology Co., Ltd. operates from 28 Longyun Road, Zhouzhuang Town, Jiangyin City, Wuxi, Jiangsu Province, China, postal code 214423. The location sits within the Yangtze River Delta manufacturing corridor, a region with dense concentration of stainless steel production, finishing, and distribution infrastructure. The supplier carries both imported supplier tier and harbor trust tier designations on the sourcing platform. Its response rate is listed at 0.00% with zero average response hours, indicating potential data capture issues or account inactivity that should be tested through direct contact before order commitment. The company specialises in welded stainless steel tubular products with broad dimensional and grade coverage.

The source profile indicates comprehensive in-house testing capacity including non-destructive and destructive methods, suggesting vertically integrated quality control or strong subcontractor relationships. Monthly capacity of 1000 tonnes positions the company as a mid-scale producer capable of handling substantial project orders. No specific founding date, employee count, revenue figures, or named client references appear in the source data, and these should be requested directly. The product breadth across multiple ASTM, DIN, JIS, and GB standards implies technical staff familiar with cross-standard equivalency, though buyers should verify actual standard accreditation scope and mill certificate authority signatories. Export experience to specific markets should be confirmed, particularly for applications requiring pressure equipment directive (PED) compliance or ASME certification.