The application of bi-metal lining pipes is more and more extensive because of low cost and resistance to corrosion.The inner diameter of bi-metal lining pipe decreases lmm~8mm as compared to carbon steel pipe.Its necessary to reevaluate the transporting capacity and friction loss of bi-metal pipes.The flow ftictional characteristics and transporting capacity of bimetal lining pipe whose outer diameter ranged from φ114mm to φ324mm were studied.Studies showed that the inner surface roughness affected transporting capacity much more than the flow cross section in condition of the same pipe size.Wall thickness of lining pipe had little effects on the transporting capacity when it was less than 4mm.The friction of bi-metal lining pipe was less than carbon steel pipe.Therefore, the transporting capacity of bi-metal lining pipe was higher than carbon steel pipe by 23％-46％ in condition of the same pipe size and pressure drop, and the transporting distance was much farther.Research results in the paper provide reliable guidance for designing bi-metal lining gas pipelines.
Gas pipelines Design Bi-metal lining pipe Friction
Zang Guojun Zeng Dezhi Jiang Yong Liu Fei Zhu Dajiang Shi Taihe
Xian Jiaotong University,Xian Shannxi 710021,China The First Oil Delivery Division,Changqing oilfi State Key Laboratory of Oil and Gas Geology and Exploitation,Southwest Petroleum University,Chengdu, Changqing oilfield,PetroChina in Inner Mongolia Autonomous Region liaison office,Xian Shannxi 71001 State Key Laboratory of Oil and Gas Geology and Exploitation,Southwest Petroleum University,Chengdu, State Key Laboratory of Oil and Gas Geology and Exploitation,Southwest Petroleum University,Chengdu,