... pressureBoiler pipe140-3406.0-4020GGB5310 For chemical fertilizer pipe, oil pipe, gas pipe, fluid pipe, boiler pipe and so on. 20MnG25MnG15MoG20MoG15CrMoG12Cr1MoVGSt35.8,St45.8DIN17175SA106A ... 1ISO3183-2For the purpose of transportationOf gas, water, oil in oil andGas industry.A,B,X42,X46,X56,X60,X65API ... Spec 5LBASTM A53ASTM A106OCTG Pipe 6-40API J55-API ...