Carbon steel flange refers to the mechanical properties of the carbon content of the steel, and generally do not add a lot of alloy elements of steel, sometimes also known as plain carbon steel or carbon steel. Carbon steel, also known as carbon steel, refers to the carbon content of WC is less than 2% of the iron carbon alloy.

Steel plate should be ultrasonic inspection, no delamination defects; It should be cut into strips along the rolling direction of steel, and welded into rings by bending, and make the surface of steel ring cylindrical. Steel plate shall not be directly machined into neck flanges; The butt weld of the ring should be full penetration weld; The use of carbon steel bolts do not necessarily need to add insulation gasket and barrel, plus insulation gasket and barrel is only used for the possibility of electable or pipeline fluid is flammable and explosive occasions, this occasion to choose stainless steel bolts also add insulation gasket and barrel.