PVC管施工试压应注意事项（PVC施工现场

1、  大楼建筑物楼板打混凝土之前，自来水管线须依规定做水压实验，实验压力一般为10KG/平方厘米或最高使用压力1.5倍，并应保持1小时如无漏水可打混凝土，上述水压试验，一般均每层分别进行。

2、  活套管试水压时，管线须予盖上，如环境许可时，可仅留活套头部分不盖土，试水前须盖土的目的，主要为防止活套水试水压时之脱开，如在市区因交通流量大。一般可全部盖土后试水压。

3、  管线施工后须分段试水压，每段长度约500-1000M，试静水压力为10KG/平方厘米或者最高使用压力1.5倍，并应保持1小时并勘察是否有漏税现象，试压的管线较高之位置与管端，应装设排气阀。

4、  管线埋设须先填砂，厚度最小10CM，管子不得与石头直接接触。

5、  大楼楼板的电子配管以直线配管为原则，如需要弯曲时，一个弯曲角度应在90度以内，且一区间（两接线盒间）的管线弯曲角度，合计不得超过270度，且配线长度不得超过30M。

6、  电器用管与接线盒。装配后于打混凝土时应防止受到破坏或损伤，如有破损应即修复，以免影响往后的拉线工作。

7、  楼板内的埋设配管，一个交叉点的管子，应为2支以下，不得同一位置有3支管子相交叉。

8、  楼板打混凝作业中，水电工人员应常驻于工地，以便处理配管上的突发时间。

9、  给水管用胶合剂不得含有毒和利于微生物生长物质，不得对饮用水水质有影响。

10、寒带地区，外露管道施工，需作防冻设施。

11、以上注意事项仅供参考，实际施工时请遵守中国工程建设标准化协会标准的相关的规定。

Notice ltems of PVC Piping installation:

1 Before comcreting the floor, run water pressure test on the tape water pipe line with testing water pressure retained for one hour at 10KG/CM2, nor higher than 1.5 times of the working pressure. Start concreting only when no leakages is abserved. Usually, this test is separately run by floor.

2 Earth coverage over the pipe line is required on testing the water pressure of spigot pipe, which however may be left bare only the connecting parts if working environment permits. The purpost of earth coverage is required before the test to be run un where heavy,traffice flow occura,such as in the downtown area.

3 Run the water pressure test by section for approaxi mately  very 500-1000M on pipe completed, at the testing bydrostatic pressure retained for one hour at not lower that 10KG//CM2, nor higher than 1.5times of the working pressure. Pbserve for any leakage.. Provide vent walve to the pipe line at the pipe end or at where with higher elevatiaon..

4 Sand filling with layer thickness not less than 10 cm is required before the embedment of pipe line. DO ot cause the pipe to contact directly with any stone.

5 lLinear allocation governs the pipe for electric con duit on the builking floor. If bending is required,the bend angle shall not be larger than 90, and not larger than 270 in total in one area The wiring length shall not be larger than 30M.

6 Prevent the assembled pipe for electric conduit use and wiring cases from being destructed or damaged by or more pipes at the same intersection is not allowed.

7 Number for pipe at intersection embedded in the floor shall not be larger than two as illustrated below. Three or more pipes at the same intersection is not allowed.

8 Civil utilities technician shall be always available on site during the operation of concreting in case of any incident to the piping work.

9 The adhesives for PVC pipesin water works which can not include any toxins or sonmethis that was complied with microbeds to grow.and shouldn`tinfluenced with potable water.