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YINLI (Zhejiang Yinli Industry And Trade Co., Ltd.), based in Wenzhou, China, manufactures seamless stainless steel pipe and holds more than 5,000 tonnes in stock across 200+ sizes. Stocked sizes ship within days; most products ship in 7–15 days.

The ex-stock range covers outside diameters of 12–630 mm and wall thicknesses of 1–30 mm.Our normal stock is including 304/304L、316/316L、310S、321、904L、254SMO、2205、2507、625、N10276 etc. Customize to required length is acceptable. Our Mainly products:Stainless Steel 304/L/H, 310/H/S, 314, 316/L/H/Ti, 317L, 321/H, 347/H; Super Austenitic Stainless Steel 904L, S30815 (253MA), S31254 (254SMO); Duplex and Super Duplex Stainless Steel UNS S31803, UNS S32205, UNS S32750, UNS S32760, UNS S32550 ; Nickel Alloy Inconel 800 (UNS N08800), 800H (U NS N08810), 825 (UNS N08825), 600 (UNS N06600), 625 (UNS N06625),Monel 400 (UNS N04400), Alloy N10276, N06022, N10665, N10675 etc.

We are certified to ISO 9001, ISO 14001 and ISO 45001, and hold China's Special Equipment (pressure piping) Manufacturing Licence TS2733T58-2029, valid to July 2029. An ASTM A312/A312M type-test report covers grades TP304 to TP347H, OD 57–159 mm, valid to March 2029. A GB/T 14976-2025 type test covers OD 57–630 mm, wall 2.0–30 mm, valid to April 2030. We also hold third-party test certificates from NCS, China's national steel testing centre, and a mill test certificate accompanies every batch. In-house QC covers ultrasonic, eddy current and hydrostatic testing, mechanical properties and spectral chemical analysis. Pre-shipment inspection by SGS, BV, TÜV, DNV or your own engineers is welcome.

That stock sits on three decades of manufacturing. Seven production bases across Zhejiang and Shandong — our manufacturing arm, Zhejiang Yinli Steel Industry, plus Zhejiang Yinmai Flange, Shandong Jinlai Fittings, Shandong Yinmai, Shandong Xinyimai, Shandong Zheyin and Zibo Yinli — also supply pipe fittings, flanges, valves and CNC-machined parts, along with building and decorative materials. A complete piping package ships on one order, through one point of contact. Our pipe serves chemical and petrochemical processing, oil and gas, heat exchangers, data centres, mechanical and industrial engineering, construction, power generation and environmental technology, shipbuilding, automotive, coal gasification and aerospace.

Zhejiang Yinli Industry And Trade Co., Ltd has strong strength, values credit, abides by contracts, guarantees product quality, and operates with small profits and multiple varieties, winning the trust of every customer.