Stainless Steel Flange, Pipe Fittings, Valve manufacturer / supplier in China, offering Premium 316 Stainless Steel DIN4533 DN50 RF Slip-on Flange, Premium JIS B2220 DN300 316 Stainless Steel CNC Machining RF So Flange, High-Quality JIS B2220 ASTM Alloy Steel A350 5K~40K Slip-on Flange and so on.