astm a106/a53 gr.b/ api 5l gr.b size: 1/2"- ... ,XXS,XS,STD Standard: . ANSI. JIS. DIN,GB keywords: astm a106/a53 gr.b/ api 5l gr.b size:1/2 ... -Sch160XXSXSSTDStandardAPI,ASME, B36.10M 1996, JIS,DIN, GB8162,GB8163,GB5310MaterialASTM A106 GRB/ A53 GRB/ API 5L GRB/ API 5 CT/ Q345 ...