... , Q195, Q235, Q345B, 30CrMo, 42CrMo Standard: ASTM-A106/A53/API5L Gr.B ST44, ST52 GB/8162, GB/8163 Surface Treatment: Galvanized ... , ChinaTel: +86-635-8886513 Fax: +86-635-8886535Mobile: +86-15194009714Website: http://www.cnxinglong.cnseamless steel pipes /tubes seamless steel pipes /tubesseamless ...