Anti-corrosion technique plan of the pipe’s inner wall 
1.施工工艺 construction technology 
喷砂除锈    检验      底漆       检验   面漆   检验     喷涂标志         出厂
Blast cleaning→inspection→primer→inspection→finishing coat→inspection→spraying mark→delivery 
2. 喷砂除锈 blast cleaning 
2.1管道内表面高压喷砂除锈达到AWWAC210-97规定要求,表面粗糙度达到40-70µm;
The pipe’s inner face should reach the AWWAC210-97 requirements after high pressure blast cleaning, and the roughness of surface should reach 40-70um.