... Co.,LtdNameseamless steel pipe astm a 106 Brand nameXinglong (ourself)StandardAPI 5CT ,API 5L,ASTM A53, ASTM 106ASTM A179, ASTM A192,ASTMA210,ASTM A213,ASTM A519,ASTM A333,ASTM A334 ... , 30CrMo, 42CrMo Standard: ASTM-A106/A53/API5L Gr.B ST44, ST52 GB/8162, GB/8163 Surface Treatment: Galvanized or oil treatment from ...