In recent years, PE pipes have become the best choice for urban gas networks and low-pressure water supply networks because of their unique, good weld ease of connection, crack resistance, environmental protection, health and recycling. Features. With the popularization of PE pressure pipeline application, PE fusion fittings have been widely used for its easy construction and reliable welding, especially in the field of city gas, and also started to be widely used in the field of water supply. 

Historical experience shows that the actual application at home and abroad is basically equivalent to PE pipe service life of welding reliable connection methods. As a result, fuses and welding machines are widely used and rapidly developing. In addition, in recent years, the wire mesh skeleton polyethylene composite feed pipe, with the advantages of PE pipe, comprehensive performance is more superior than PE pipe, especially in the resistance to fast cracking stress cracking, creep resistance, continuous mechanical strength and other properties better than pure PE pipe, etc., therefore, also began to be widely used in municipal water supply pipe. The main connection method is electric fusion welding, and corresponding fusion fittings and welding machines have been developed.

PE pipe fusion welding principle

Polyethylene pipe fusion welding principle is embedded in the electric welding machine to fusion tube wall resistance wire heating, heating energy to make pipe fittings and oil pipe connection interface melting. The gap between the two ends of the tube closed, the melt zone and the interface of the melt under high temperature pressure, the molecular chain diffusion each other, if the interface to the depth of molecular chain mutual diffusion entanglement required size, natural cooling interface can obtain the necessary welding strength, the formation of a reliable welded connection tube. According to the principle of electrofusion welding at home and abroad and practice confirmed that the pipe can form a reliable welded connection, mainly by the melt pipe design, resistance temperature, resistance performance

Characteristics of PE pipe

Good sanitary performance: PE pipe processing without adding heavy metal salt stabilizer, the material is non-toxic, no scaling layer, no breeding bacteria, a good solution to the secondary pollution of urban drinking water.

Excellent corrosion resistance: except for a few strong oxidizers, it can resist the erosion of many chemical media; no electrochemical corrosion. Long service life: PE pipes can be safely used for more than 50 years under rated temperature and pressure conditions.

Better impact resistance: PE pipe has good toughness and high impact strength, and heavy objects directly pressed through the pipe will not cause the pipe to break.

Reliable connection performance: The strength of PE pipe hot fusion or electrofusion interface is higher than the body of the pipe, and the joint will not be broken due to soil movement or the action of live load.

Good construction performance: the pipe is light, the welding process is simple, the construction is convenient, and the comprehensive cost of the project is low.

PE pipe connection

Electro-thermal fusibility: special electro-thermal fusion welding machine is used to connect straight pipe with straight pipe and straight pipe with pipe fittings. Generally used mostly for pipes below 160mm.

Hot fusion butt connection: using a special butt welder pipe connected together, generally used more than 160mm pipe.

Steel-plastic connection: can be connected by flange, threaded fillet and other methods.

To facilitate construction and ensure the quality of construction, you should also prepare the appropriate tools.

Such as: rotary cutter a cutting pipe; rotary scraper - scrape the surface of the pipe oxide; climbing wall scraper - scrape the surface of the large diameter pipe chemical skin; gas break tool - to achieve the gas break site operation.

Cangzhou Shenlong Pipe Manufacturing Factory is the world's leading supplier of carbon steel pipes, oil pipes, seamless pipes, welded pipes, galvanized pipes, casing and steel fittings.