... professional organizer and one-stop-shop supplier for stainless steel tubes, pipe fittings, flanges, valves and stud bolts, etc. in China. Starting the ... not only stainless steel materials, but also super duplex steel (S32750,S32760, etc.), special austenite stainless 310H, 347H, 317L, ... SpecificationStainless Steel Sanitary Check Valves Welded and ...