文档介绍：钢管内壁防腐施工技术方案
Anti-corrosion technique plan of the pipe’s inner wall
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
-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.
,保证管道表面无锈、无尘或其它表面附着物,确保漆膜和钢管表面的附着力。
After basting cleaning, the surface of pipes should be cleaned with high pressure air before coating to ensure the surface no rust, dust and others so as to keep the adhesion of paint film and the surface of pipes.
,在4小时内尽快涂装,以防止二次生锈。
The qualified pipes after blast cleaning should be coated within 4 hours as soon as possible to prevent the second rust.
3. 钢管内壁喷涂 inner wall spray coating of pipes
%、钢管表面温度低与在大气露点以上3ºC时,或高与60ºC时禁止施工作业。室外作业,当风速大于3m/S,禁止施工。
Operation should be forbidden when the relative humidity in air is more than 85% and the surface temperature is less than 3℃ above dew point or higher than 60℃.The field operation should be forbidden when the wind velocity is more than 3m/s.
,配制比例熟化时间应严格按照涂料使用说明书中的规定。
The material adopted for inner wall anticorrosion is ponents epoxy anticorrosion paint, and the confect proportion should conform to the stipulation in the paint instruction strictly.
,采用自动高压无气喷涂施工,确保涂装质量,喷涂时,喷嘴轴线与管体角度保持80º-90º,枪口距离管体表面约500
-600mm,喷枪移动速度应均匀,保证涂层平整,光滑、均匀、饱满。焊缝两侧150mm范围内,在喷涂时不涂底漆。
According to the design requirement, automatic high pressure airless spraying should be adopted so as to ensure the coating quality. While painting, the nozzle-axis should be keep 80°-90°with tube. The distance between muzzle and tube should be 500-600mm; the spraying pistol moving velocity should be uniform to keep the coating smooth, neat, uniform, satiation.
Primer should not be coated whe