... /MOthers1, Special design available according to requirements.2,anti-corrosion and high-temperature resistant with black painting.3,all the production ... black painting anti-corrosion , 3LPE coating 2.Application:Natural gas, petroleum, chemical industry, electric power, metallurgy thermodynamic fields, water supply engineering, steam ... X42,X46,X52,X56,X60,X65,X70 steel pipe/oil and gas line pipe