Fittings for HDPE pipes (HDPE - low pressure polyethylene) are an indispensable part that ensures the continuity and throughput of the pipeline. They are necessary where it is necessary to connect pipes of different diameters or materials, in places of their turns or branches, as well as during repair work of pipelines made of polyethylene.
Fittings for HDPE pipes are made of the same material as pipes. It has several advantages relative to others: it is resistant to chemicals and deformations, temperature extremes; does not rust and does not undergo oxidation; does not decompose and serves more than 50 years; low weight and environmentally friendly.
The main types of fittings during the installation of polyethylene pipes:
- cast;
- welded;
- electric welded;
- compression.
Fittings for PND pipes cast (SPIGOT)Produced under pressure by casting, subjecting them to further machining. They are used in all types of compounds. Cast fittings are resistant to chemical aggressive environments, do not oxidize and do not change diameter. They maintain throughput by eliminating deposits inside the walls of the pipeline.
Fittings for PND pipes welded (segment)
Designed to connect pipe segments in the places of their turns and branches; at the joints of pipes of different diameters or with fittings. The connection is made by butt and electrofusion welding.
Fittings for PND pipes electrowelded
They are produced under pressure by injection molding and have an electric spiral inside, which, when heated, is hermetically connected to the pipe. Fittings of this kind have a bar code that indicates the required voltage strength and the time it takes for stable sealing.
They are used in the repair of pipelines located in the ground, in walls and ceilings. The connection takes place using a special welding machine, which allows you to set the necessary parameters for heating.
PND Compression Fittings
A very convenient type of fittings, since they are released ready for use. The pipe does not need preliminary preparation, and sealing occurs without a welding machine and other devices, a sufficient metal or plastic compression key. Thanks to the standard external and internal threads, these fittings are suitable for connecting pipes of different materials.
The compression fitting can be assembled and disassembled up to ten times, while it does not lose its quality, and if repair is necessary, it is enough to replace the internal components with a key.
Absolutely not subject to corrosion, as it does not contain metal elements. Suitable for transporting food liquids and drinking water, as all parts are made of hygienic materials.
All fittings for HDPE pipes are available in the form of tees, elbows, internal and external threads, etc., and the connection principle is similar to the installation of metal-plastic pipes. It is sometimes recommended to use sealant at the junction of the fitting and sealant.