Drag reduction inner coating for heavy hot bending elbows of gas pipeline

The performance of drag reduction inner coating for big diameter nature gas pipeline and the construction procedure of drag reduction inner coating material for hot bending elbows of pipeline are introduced. The requirements for the control of temperature, proportion, blending, curing time and diluent adding for formulating of AW-01 di-component coating are presented. The control requirements for spraying pressure, compression ratio and spraying links of high-pressure airless spraying are recommended. The application technique is used in Shaanxi-Beijing Gas Transmission Parallel Pipeline with high technology and economy. And the application experience can be taken as a valuable reference in similar long-distance gas pipeline.