... .2,anti-corrosion and high-temperature resistant with black painting.3,all the production process are made under the ISO9001-2000 ... .Surface Treatment:Transparent oil or black painting anti-corrosion , 3LPE coating 2.Application:Natural gas, petroleum, chemical industry, electric power, metallurgy ... ( { 'aImgSrc': aBigImageSrc } ); } )(); API5L X42,X46,X52,X56,X60,X65,X70 steel pipe/oil and gas line ...