Forged Weld Neck Carbon Steel Flanges

　　Forged Weld Neck Carbon Steel Flanges method has the following:1. The nature of the transport medium, the general media, extra media, toxic media, flammable and explosive media. 2. According to the media parameters, working pressure, working temperature, in the medium is to determine the circumstances, according to the medium working temperature and working pressure to determine the flange nominal pressure PN. 3. According to the use of places, connecting conditions to determine the connection flange and pipe approach and sealing surface. 4. Determine the flange size according to the connection target.