Technology of welding polyethylene pipes

Preparatory stage

It is very important to organize the work preceding welding, which will ensure the simplicity and speed of the connections and their reliability and quality. They are similar for all types of welding and are as follows:

1. Preparation of work site and welding equipment for the process
2. Surface of pipes to be connected, cleaned and degreased, like
3. connection fittings.if necessary, degrease again

Preparation of welding equipment must be carried out very carefully, taking into account the recommendations of the supplier of the tool. In this case, the connections will be performed correctly and reliably, and the device itself will have a long service life. It is important to regularly check the equipment for operability and correct faults on time.

The welding unit is installed on a flat surface, where nothing will interfere with its operation. Before putting it into operation, it is necessary to perform the following checks:

• Check the appearance of the device, the integrity of the insulation coating and the grounding of the
• The energy generator is refueled and the test switching is performed.
• . Monitoring the engine oil level in the
• hydraulic system. Check how the mobile clamp works andsharpness of the
• cutter blades. Reconciliation of the test equipment
• Special clamps and inserts for welding pipelines of the required diameter of osmatrprepared and prepared for the
• process. The parts that cause friction are lubricated with special substances according to
• instruction. Cleaning of the heating element, pipe cutter and other parts needed from the traces of polyethylene and removing the surface from greasy plaque

Butt welding

The technology of welding polyethylene pipes inThe joint provides for heating the edges of the pipelines and melting the material under the influence of the heating element of the welding machine, after which they join together forming aa nylon fastening.

Operating instructions:

1. The connecting parts and the ends of the pipes are fused to form the primary bead
2. Then the polyethylene is heated to the temperature specified in the instruction - the material softens to ensure its ability to mix at the molecular level
3. The heating element is removed and the edges of the pipes are compressed

The last operation, called the technical pause, must be reduced to a minimum in time, as it is necessary to avoid material cooling and lossits plasticity, as well as not allow particles of contamination to fall on welded surfaces.

1. Butt welding forms a strong anchorage, which is created on the soil of diffusion penetration of the material.
2. The welded seam is cooled, giving it the highest strength in the final stage of the work

Electrofusion welding

There is another technology for welding polyethylene pipes - a connection using electrically welded fittings. Also, an electrical spiral is used for the softening process of the fitting material.

Connection of pipelines to each other in this way is carried out in the following way: a metal wire twisted in a spiral is installed in the fittings. The plastic is melted by means of the apparatus in certain parts that need to be welded - junctions, couplings, bends, etc. Under the influence of thermal energy released during the passage of current through the wire, the material heats up, forming a strong and reliable connection.

The use of electrowelded fittings is due to the introduction of electrodes to the design of the part and the diffuse penetration of the fitting and pipe material and their molecular interaction. A welded seam of high strength is formed.

The technology of welding polyethylene pipes depends on the purpose, diameter and thickness of the walls and the type of piping. With the proper organization of preparatory and welding works, a high-quality communications connection is formed, which in the future will create an efficient and reliable system with a long service life.