... .24-16.13WTTubing is used to extract oil and natural gas oil casing for the wells wall of the oil ... gas wellsLine pipeA,B,X42,X46,X52,X56,X60,X65,X70, ... *3-100WTFor conveying the oxygen,water and oil in the petroleum and natural gas industriesERW pipe20,Q195,Q235A,B,Q345BGB/T13793-1992GB3091 ...