Building water supply and drainage: Discussion on the leakage of UPVC plastic pipe
The plastic pipe for water supply and drainage is a new chemical building material developed and applied vigorously in China at present. As a construction water supply and drainage pipeline, it can alleviate the contradiction of steel shortage and energy shortage in China, and its economic benefit is very significant. But in the process of popularization and application, especially in the past few years in the process of installation and use also appeared a lot of problems, the following for the water supply and drainage plastic pipe seepage problem causes put forward the corresponding countermeasures.
Causes of leakage mainly include lax inspection of building materials quality, problems in construction quality and non-standard acceptance of projects.
1. Pipe Quality Problems A small number of water supply and drainage pipe fittings are caused by the quality problems of the material itself (such as insufficient wall thickness of the pipe, too much filling material in the product composition, too large size deviation of straight pipe and socket of pipe fittings, etc.), which causes the pipe to break and leak.
2. Adhesive Quality Problem To reduce costs, the project used low quality adhesive, due to its unstable quality, adhesive is not tight, resulting in pipe leakage.
3. Construction quality problem The construction unit has insufficient experience in the construction of UPVC plastic pipe for drainage. During the installation process, the construction staff is perfunctory, so that the construction quality is not guaranteed, causing many hidden dangers.
4. Acceptance of the work is not standard problem is mainly the present situation is installation by construction unit hire site supervision personnel, combined with the site supervision personnel quality is uneven, to drain the closed water test, the feed pipe pressure test is not in accordance with the requirements of construction acceptance specification acceptance operation, left a link to developers and users.
How to avoid the leakage of UPVC plastic pipe, we must increase the measures and countermeasures.
First of all, strengthen the management of materials into the site, strictly purchase quality, put an end to unqualified products into the site. The building materials entering the site must have the production and sales license and product qualification certificate approved by the competent department of local construction, and pipe materials, pipe fittings and adhesives should be supplied by the same regular production plant.
Second, strengthen the construction management, improve the worker training system, the implementation of the worker certification system. At present, the quality of construction workers on construction sites is uneven, and there are a large number of untrained migrant workers. These workers, many of whom are hired on a temporary basis and have little knowledge of construction procedures, are likely to leave when they are paid, regardless of the quality of construction. Labor relations tension, combined with the site often appeared phenomenon of unpaid wages, in order to find some installation workers, are deliberately not at work in accordance with the requirements of process operation, even breaking the pipes, the remaining sand rubbish into the commode, causing blockage and leakage phenomenon occurs frequently, so you need to improve site recruitment system.
Third, vigorously promote the use of project construction supervision system, construction units hired qualified supervision companies to monitor the quality of the project. At present, most of the quality problems on many construction sites are caused by the inadequate management and supervision at ordinary times, and many construction supervisors hired by the engineering department of many construction units are not professional enough, and part of the staff is not dedicated enough, often difficult to play a real role in project supervision. The project of regular inspect manage company supervises a personnel to hold a certificate mount guard, be familiar with relevant code, can hold project quality to pass. When the construction quality is controlled, the leakage problem is basically eliminated.
Fourth, from the source, in the design drawings as far as possible to take specific measures to prevent leakage problems. Improve the structural form of toilet.
(1) rear row type sanitary ware is selected, floor floor is installed side wall type floor drain.
(2) design local sunken toilet, reduce the number of holes through the pipe floor, can effectively solve the pipe floor leakage problem. The method is to sink toilet floor locally 300 mm, sink part is filled with cement cinder, this layer drainage branch pipe is laid in the toilet cushion layer of this layer, and appropriate is affixed to sink floor surface place installed side wall type floor drain, even if pipe leakage occurs so, water will also be discharged from side wall type floor drain place. Above measure increased wholesome clean to provide the flexibility that decorate when decorate 2 times already, solved toilet ooze water problem again, and still can avoid up and down floor because of leaking the neighborhood contradiction that cause, and the noise that can reduce drain plastic pipe effectively.
The horizontal main drainage pipe in the pipe conversion layer adopts the flamed water supply plastic pipe with flexible connection. In the design of building water supply and drainage, it is often encountered that several risers converge to the transverse trunk pipe suspended in a suspended ceiling. According to the specification requirements, the horizontal main pipe should be set according to the design of expansion joints. And the slip joint is set on the horizontal main easy to leak, another common drainage UPVC pipe wall is thin, very brittle, noise is bigger also, so in the drain in the piping transformation layer had better use flexible connection of flaring water supply plastic pipe, the pipe wall thick, high strength, impact resistance, low noise, and because of its interface for flexible connection, don't need to install the expansion joints, seismic, also can effectively prevent the leakage of pipeline joints. Now there are a lot of people in the pipeline transfer layer of the drainage pipe using drainage cast iron pipe or water cast iron pipe, and cast iron pipe since heavy, internal surface is not smooth, easy to plug, installation inconvenience, the effect is not as good as the flexible connection of the flamed water supply plastic.
Building materials products on the market are mixed, the design institute should give full play to the advantages of information resources, assist the construction unit to choose good quality and reliable appropriate products.
The use of slow closing and silencing check to replace the ordinary swing check valve on the water pump outlet pipe can eliminate or reduce the damage effect of the water hammer on the water supply pipe. Toilet partition is unfavorable use hollow brick, hollow brick can enlarge area of seepage water, and affect wholesome clean to provide and the installation of water heater.
Although there have been some problems in the promotion and use of UPVC tube, its advantages are more and more accepted by people. As long as the manufacturers keep good quality and develop more new products. Construction units to strengthen the construction management, improve the quality of installation. Strict inspection and acceptance of design supervision, believe that the use of water supply and drainage UP-VC pipe will bring more and more economic and social benefits.
