1.Size:1/2"-96" 2.Pressure:#150-#2500 3.Material:SS,CS, ... :ASME,BS,GOST,eg 5.Certificate:API,ISO,CE,eg 1.Size:1/2"-96" 2.Pressure:#150-#2500 3.Material:SS ... ,BS,GOST,eg 5.Certificate:API,ISO,CE,eg ANSI SW Forged Flange size1/2" to 24" ASME B16.526"to ... :Petroleum, chemical, machinery, electric power, shipbuilding, papermaking, construction, etc ANSI SW Forged Flange