... ,BS,GOST,eg 5.Certificate:API,ISO,CE,eg ANSI SW Forged Flange size1/2" to 24" ASME B16.526"to ... , 1500Lbs, 2500Lbs, /PN6,PN10,PN16,PN20,PN25,PN40/ Class A, B, C, D, EstandardASME B16.5, ASME B16.47, ASME B16 ... :Petroleum, chemical, machinery, electric power, shipbuilding, papermaking, construction, etc ANSI SW Forged Flange