... ,LASW,eg 5.Certificate:API,ISO,CE,eg TypeApplicationSTANDARDMATERIALAlloy steelpetroleum, chemical industry, electricity, boilerindustry for high temperature resistant, low temperature resistance,Corrosion ... ,P22, P9,egStainless steeloil, aviation, metallurgy, food, water conservancy, electric power, chemical industry,Chemical, , pharmaceutical machinery, etc ASTM A213ASTM A312304(L),316(L)Mild ...