... 20,35,45,Q235,Q295,Q345,40Cr etcGB/T81622Pipe for Liquid Transportation10,20,Q345 etcGB/T81633High Pressure Boiler Tube20G, ... and Medium Pressure Boiler Tube10,20GB30875High pressure Pipe for Fertilizer Equipment10,20,16Mn,15CrMoGB64796Petroleum Cracking Tube10,20, ... 12CrMo,15CrMoGB99487Tube for ship Building360/410G,360/410,GL-R361/410, ...