Integral flange (IF) is mostly used in high pressure pipelines, generally RF. If it is used in inflammable, explosive, high and extremely dangerous working conditions, the sealing surface of convex concave surface (MFM) and tenon groove surface (TG) other than RF surface can be selected.
Standard: DIN 2543, DIN 2544, DIN 2545, DIN 2546, DIN 2547, DIN 2548, DIN 2549-1997, HG 20596, GB/T 9113.
Material: carbon steel, ASTM A105, Alloy steel and stainless steel.