Sewer and water supply pipe pnd - everything you need to

25-10-2018
Pipes

Pipe PND for water supply and sanitation is used so widely that you can meet it almost everywhere. The overwhelming majority of communications collected today are made of such pipes, which testifies to their high quality and excellent operational properties. In this review, we consider the main characteristics of this group of products and features of the installation work in various types of systems.

In the photo: an indicator of the highest quality of products is their compliance with the standards of GOST 18599-2001

Main criteria for choosing pipes

Consider what the technical characteristics of the HDPE pipe for water supply and sewage networks are of the greatest importance. Each of the parameters is very important, and a deviation in at least one of them may adversely affect the reliability of the system:

Brand of polyethylene Nowadays, two types of raw materials are used - PE80 and PE100. PE100 is used for the manufacture of products of large diameter, it allows you to save material and get a pipeline of high reliability, such options are ideal for cold water supply and sewage. PE80 is highly durable and pressure resistant and is used in the manufacture of small pipes.
Pipe diameter The importance of this parameter lies in the fact that the optimally selected dimensions provide a stable pressure, which is important for water pipes. In the case of sewage systems, on the contrary, the diameter should provide the required throughput without overflowing the system at maximum loads.
Resistance to internal and external pressure Resistance to internal pressure is denoted by SDR, the smaller this indicator, the stronger the pipe, remember this factor. External pressure is created by the movement of soil layers, especially the deformation affects the freezing of the soil and driving on the surface of heavy machinery
The thicker the walls of pipes, the higher their strength and resistance to adverse effects

Features of this type of pipes

In order to choose one or another option, you need to know all its advantages in comparison with other solutions. This should take into account not only the operational properties, but also the features of the installation of communications, since some types of pipes cannot be connected by hand without using special equipment, the price of which may be too high.

The advantages of HDPE pipes

The main advantages include the following factors:

  • Low weight, in comparison with analogues of cast iron, steel or concrete, HDPE pipes for water supply and sewage systems are several times easier, which greatly simplifies transportation, loading and unloading and installation of the system.
  • Long service life, manufacturer's warranty is 50 years, and the estimated service life can reach 150-200 years, which is one of the highest rates among all options.
  • Product flexibility allows you to make turns without connections, which simplifies and speeds up the workflow.
So just you can lay the pipe
  • Corrosion resistance - water and sewage pipe PND is able to withstand even chemical effects. Constant presence in a humid environment in no way violates the structure of the material, which is very important.

Note! HDPE pipes can even withstand freezing without disrupting the structure, but still they should be protected from the constant effects of low temperatures with the help of special pipe insulation.

  • The inner surface of the pipe is smooth, which facilitates the movement of fluid when used in water supply systems and reduces the risk of blockages in sewer communications.
  • The material is completely safe for human health and the environment., therefore, pipes are also used to supply drinking water from wells and other sources.
All pipes suitable for drinking water are labeled accordingly.

Features of the installation work

Another important advantage is the fact that HDPE pipes for sewage and water supply can be connected by a variety of methods, consider the most common options:

  • Welding pipes butt method involves heating the ends of pipes and fittings to achieve a viscous state using a special heater. After that, the products are removed from the soldering iron and tightly and gently pressed against each other. All the features of the work will be prompted by the instruction, which must necessarily be bundled with the heater, it is important to combine the nodes exactly so that there is no distortion.

Tip! Pay close attention to the preparation of elements for welding, the ends should be smooth, free of scuffing and delamination, the surface must be thoroughly cleaned from dirt and moisture.

Equipment for soldering should provide a clear fixation of elements.
  • The use of special fittings for electric welding makes it even easier to work: steel spirals are embedded in the connecting elements, which, when connected to the electrical network, heat up the connector and the pipe and ensure a reliable connection after cooling the joint.
  • The easiest and easiest to use method is the use of compression fittings for pipes; their use does not require the use of any equipment and tools. All work is done manually, the process is extremely simple: fittings of the required configuration of the required size are purchased, the connection is made by unscrewing the coupling and putting the sealing ring on the pipe, after which the pairing is twisted with moderate force.
Compression fittings allow you to work very quickly and efficiently.

Conclusion

The use of products from HDPE allows you to make high-quality communication systems with minimal cost. The video in this article will tell some features of the workflow and clearly show the nuances of work.