How to Repair PVC Pipe Without Cutting - A Detailed Guide
The plastic PVC pipe is widely applicable in cold water supply systems, various technological systems (for example, in the food industry), and sewage systems.
For use in systems operated under pressure, used pipes PVC-U (pressure), for gravity systems - PVC (pressure-free).
Features of installation and use of PVC pipes:
Repair of PVC pipes in Surrey can often be required if low-quality materials were used to construct the pipeline, or if the network was installed unprofessionally.
In any case, it will take some effort to restore the pipeline. With our advice and recommendations, we will show you how to avoid making the same mistakes.
The repair must begin with an external examination and diagnosis of the damaged area. It is the type of defect that will directly determine the quality, speed, and cost of future repairs.
There are several main types of damage to PVC pipes:
Consider the features and methods of repairing each of these types of damage.
Although PVC is largely superior to the technical and operational characteristics of cast-iron and steel pipes, in terms of strength to external impacts, it is still far from the most resistant material.
As well as the flow in the nodes of the pipeline, this type of damage occurs most often, while it has the following features:
Repair PVC pipes, in this case, include the following:
Mechanical attachment couplings can also be used. They are usually applied in installation conditions of high complexity, for example when installing underwater.
The use of electrofusion couplings is usually cheaper, and the quality and reliability of such a connection are almost always higher.
Local damage to the pvc pipe
Local damage is a defective hole in a pipe whose diameter does not exceed 50 mm.
Eliminate local damage in the following way:
Crumpling PVC pipe
When a PVC pipe is bent, it is often not necessary to take any special measures to eliminate it. The deformation of the pipe is not always evidence of a violation of the integrity of the pipeline.
Often this is caused by local mechanical factors, eliminating which, and returning the pipe to the operation, the PVC pipe will even out with time due to internal pressure and its own rigidity.
If the collapse is not eliminated independently and at the same time interferes with the normal current of the working fluid, the crumpled section of the pipeline will need to be replaced.
Remember that the presence of scratches or cracks on the surface of the pipe, the depth of which is more than 10% of the total wall thickness, indicates the need to replace a section of PVC pipe.
PVC pipe repair
PVC pipes: repair by electrofusion over the damaged area
Causes of leaks:
The method of eliminating leaks in the pipe - repeated repair, only in accordance with all the rules and technology.
The connection of elements of the household PVC pipeline by a welded method
Importance of pipe dewatering during welding
Clean and dry pipe - the key to successful welding (soldering) of PVC pipes. Only with mechanical methods of connecting pipes water cannot be a hindrance. If, on the other hand, it penetrates into the welding zone during heating, steam will form, creating excessive pressure, which, in turn, may lead to disruption of PVC fusion, which will make the connection insufficiently high quality and unsuitable for operation.
If it is not possible to completely shut off the water flow, on the flange joint of the pipe with the valve should simply loosen the bolts. In this case, the water will flow into the well, and not into the cavity of the pipe.
In order to have the need to repair pipes made of PVC as rarely as possible, it is necessary to carry out pipe connections and pipe laying correctly from the beginning. In addition, the materials used must fully comply with the operating conditions of the highway.