... 10-630mm 3. ASTM,DIN,JIS,BS satanda Company Name : Liaocheng Xinglong Seamless Tube Manufacturing Co.,LtdNamest42 seamless steel pipe Brand nameXinglong (ourself)StandardAPI 5CT ,API ... , Q195, Q235, Q345B, 30CrMo, 42CrMo Standard: ASTM-A106/A53/API5L Gr.B ST44, ST52 GB/8162, GB/ ... J55,K55, N80.L80,P110etc. The Standards: GB8162-2008, GB8163-2008,GB3087-2008,GB5310-1995,GB6479-2000,ASTM A 53, A106, API ...