... pipe140-3406.0-4020GGB5310 For chemical fertilizer pipe, oil pipe, gas pipe, fluid pipe, boiler pipe and so on. 20MnG25MnG15MoG20MoG15CrMoG12Cr1MoVGSt35.8,St45. ... pipe140-3406-3020#,Q295,Q345GB/T8163For the transportationOf gas, liquid and powderPipeline tubeL245,L290,L320,L360,L390 ... ,X46,X56,X60,X65API Spec 5LBASTM A53ASTM A106OCTG Pipe 6-40API J55-API P110API5CTUsed for extracting petroleum ...