一、 施工准备
（一） 砌体内PVC管施工准备
1、 作业条件
随土建砌体砌筑同时进行。
2、 PVC管材料要求
（1） PVC管的材质必须合格,其氧指数≥27%,设计有特殊要求时必须符合设计要求。进场材料必须有产品合格证,以及有效的氧指数检测报告；
（2） 外观检查,管材内外壁光滑,无凸棱凹陷、气泡等缺陷；
（3） 用卡尺测量内外径必须符合国家标准,管壁厚度均匀一致；
各种附件如灯头盒、开关插座盒、管接头
First, construction preparation
(A) preparation of masonry within the PVC pipe construction
1, operating conditions
With the civil masonry lining the same time.
2, PVC pipe material requirements
(1) PVC pipe material must be qualified, the oxygen index of ≥ 27%, there are special requirements must meet the design requirements. Admission materials must have a product certificate, and an effective oxygen index test reports;
(2) inspection of the exterior wall of tubes inside and outside the smooth, non-convex edge dents, bubbles and other defects;
(3) in diameter with a caliper must meet national standards, uniform wall thickness;
Accessories such as lamp boxes, switch socket boxes, fittings