... .STPG42. STB30-STB42StandardGB/BS/DIN/ASTM/ASME/JIS/GOST,etcApplicationUsed For Petroleum ,power ,gas metallurgy ,papermaking ,chemical ,medical equipment ,avaiation ,boilerheat ... Treatment Can Supply)InspectionWith Hydraulic Testing, Eddy Current , Infrared or X-Ray TestAlso With Chemical And Physical Property InspectTechniquehot rolled / hot rolling ...