... available according to requirements.2,anti-corrosion and high-temperature resistant with black painting.3,all ... the ISO9001-2000 strictly 1.Surface Treatment:Transparent oil or black painting anti-corrosion , 3LPE ... water supply engineering, steam heating, hydroelectric power station and long pipeline transportation projects. 3.Ends: 2" ... X42,X46,X52,X56,X60,X65,X70 steel pipe/oil and gas line pipe