Hebei Cangzhou supply flange, integral flange, stainless steel flange, carbon steel flange contact: Wang Shan 15,922,054,164 QQ: 1494092364 integral flange is a flange connection. Also part of a weld neck steel pipe flanges. Made of carbon steel, stainless steel, alloy steel. IF to domestic standards, the overall flange. More for the higher pressure pipelines. Production wrought. Flange type is to use an "IF" to represent the whole flange type. The usually sudden face (RF), being in the use of flammable, explosive, highly and extremely hazardous conditions, you can choose in addition to the outside of the RF surface concave surface (MFM) and tongue and groove surface (TG) seal surface in the form of