... dip galvanization and powder coating. We owned advanced production-line, it included Flatting machine, Steel plate shearer, bending ... up machine, submerged arc welding machine and powder coating line, and our workmanship and quality control was achieved ... ASTM573 GR65, GR50 ,SS400, SS490ST52Torlance of dimenstion+- 2%Power35 KV ~550 KVSafety FactorSafety factor for conducting wine : 8Safety factor ...