... API,Raw material cert,Mill cert,Reap on site inspection report,SGS,BVStandardJIS G3444ASTM A53/ASTM A36BS1387/BS1139/EN39 ... /500,S235JR/S235JQ/S235J2,STK290,STK400,STK490,STK500,STK540Inspection :With Hydraulic Testing, Eddy Current , Infrared TestTechnique:Welded:Cold ... MonthProcessing galvanzied,inner and outer stab clean,bevelled,threading,with coupling and plastic caps protected,packing in plastic ...