GOST 12820-80 FLANGE manufacturers tell you that integral flange is a flange connection method. It is also a kind of neck butt welding steel pipe flange. GOST 12820-80 FLANGE manufacturers tell you that its materials are carbon steel, stainless steel, alloy steel, etc.

GOST 12820-80 FLANGE manufacturers tell you that in various standards in various places IF is used to represent the integral flange. It is mostly used in pipelines with high pressure. The production process is generally casting. In the flange type, an "IF" is used to indicate the type of the integral flange.
GOST 12820-80 FLANGE manufacturers tell you that the overall flange is generally a raised surface (RF). If it is used in flammable, explosive, highly and extremely hazardous working conditions, you can choose a convex and concave surface other than the RF surface. (MFM) and tongue and groove (TG) sealing surface form.
The above information is the GOST 12820-80 FLANGE manufacturer's introduction and analysis of the integral flange, hope it helps you.