... ., Ltd.) is a professional organizer and one-stop-shop supplier for stainless steel tubes, pipe fittings, flanges, valves and stud bolts, etc. in China ... 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 Clamp ...