Flange type fully welded ball valve 01

Flange type fully welded ball valve 01 has certain requirements for the value of M and S in the weld metal in order to prevent the occurrence of product cracks. How big is the M value of S can help prevent crystal cracking, and it is also related to the carbon content. The higher the C content, the higher the value of M is required. The excessive presence of si, Ni and impurities. The valve is a long-distance oil and gas pipeline for the purpose of gathering, distributing and regulating the output, as well as the operation of the station circulation, equipment connection, inverted tank, over-station and pig piggyback and other operations. Control parts used.