对西气东输工程中管道的“先内后外”和“先外后内”的防腐工艺进行了初步的技术经济分析和比较,并初步测算出两种工艺生产西气东输管道的成本差异,提出了对工艺顺序选择的看法。 The preliminary technical and economic analysis and comparison of the anticorrosive technology of the pipelines in the project of “West-to-East Gas Pipeline” before and after “and before and after” are carried out, Pipeline cost differences, put forward the choice of process order view.