CS GOST RUSSIAN STANDARD FLANGE standard:gost size:1/2"- ... INTRODUCTION:We are a leading manufacturer and exporter in flanges and pipefittings in China and our products have been ... Middle East,Southeast Asia,South America and WEST Europe.the flanges and the pipefittings collection in th emost standard and ... PN 6,PN 16,PN 10,PN 25,PN40,PN63materail:CS CT20,16Mn,SS304/304L,316/316L COATING:RUST PROOF OIL ...