Carbon steel flanges, that is, flanges or end flange connectors whose body material is carbon steel. Flanges containing carbon steel are called carbon steel flanges.
Carbon steel flange technical conditions
The pressure marks specified in this standard are divided into PN marks and Class marks.
PN marked with 12 pressure classes
They are: PN2.5; PN6; PN10; PN16; PN25; PN40; PN63; PN100; PN160; PN250; PN320; PN400
Class mark has 6 pressures etc.
They are: Class 150; Class 300; Class 600; Class 900; Class 1500; Class 2500
Another meaning of carbon steel flange is: the flange plate produced according to the size and tolerance range required by the national standard is different from the flange piece produced not according to the standard size, also called the second standard flange (some people call it non-standard method) Lan is incorrect), usually some unscrupulous merchants will reduce the two dimensions of flange plate thickness and outer diameter to achieve the purpose of saving materials, and use scrap steel or scrap steel to process flanges, usually this kind of steel has chemical composition and Scraps whose mechanical properties do not meet the standards, and even flanges produced by private steelmaking in black steel factories. The steelmaking technology used in this kind of private steelmaking is outdated and cannot guarantee mechanical properties and welding performance. It may not be welded to steel pipes during use. Or the steel itself has cracks, pores, etc. and it will leak after welding. Therefore, try to use carbon steel flanges when purchasing flanges.
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