About PE water supply pipe, you want to know are here!

PE pipe is polyethylene plastic, the 1990s began to flourish in China, the quality continues to improve, has been widely used in construction water supply, urban water supply and other aspects of the traditional water supply company is also gradually from the cast iron pipe, steel pipe to the PE water supply pipe over. In recent years of engineering practice and application, the advantages of PE pipe has been affirmed by the construction personnel, it overcomes the easy rust, scaling, breeding bacteria, short life shortcomings, corrosion resistance, light weight, easy recycling and many other advantages.

1, PE pipe performance characteristics

PE molecules have no polarity, so the stability is particularly good, does not rot, rust, telephony corrosion phenomenon. The chemical substances present in the soil will not cause any obstacles to the pipe. In addition, it does not win bacteria, does not bear dirt, and belongs to the environmentally friendly products.

Due to the light weight of PE pipe, handling and connection are very convenient, in the process of installation of general labor can be moved. Such as a DN200 PE pipe one person to carry on the line, loading and unloading are very convenient. Both reduce the labor intensity, but also save the transportation costs, than the installation of steel pipe costs reduced by 50%, especially in the case of tight schedule, poor construction conditions, the advantages are more obvious.

PE pipe, its inner surface is smooth, than other pipes have a higher water transfer capacity.

PE pipe axial can be slightly disturbed curvature, therefore, without pipe fittings can be laid directly in a slightly uneven trench, and is not subject to a certain degree of uneven ground settlement. It also has good low-temperature resistance, minus 30 ° construction do not have to take thermal insulation measures, winter construction is convenient. There is also good impact resistance, in time 2 times the nominal pressure of water hammer will not cause any harm to the pipe.

PE pipe aging resistance, long service life, in the conditions without direct ultraviolet radiation service life of 50 years.

1, PE pipe installation

Pipe connection should be noted before, should be pipe and fittings and ancillary equipment according to the requirements of the verification, and should be constructed to the appearance of the inspection, in line with the requirements before use. The main check items include: pressure rating, with the quality, material consistency, the use of fusion and even the pipeline, the use of the same kind of good brand material pipe, pipe construction. For the performance of similar must first be experimented with, qualified before proceeding, according to different forms of interface using the appropriate thermal processing, shall not use open flame heating pipes and fittings.

PE pipe is the most convenient is hot melt connection, electrofusion connection, socket connection. Hot melt connection is divided into hot melt socket connection and hot melt butt connection.

(1) hot melt socket connection is to match the inner surface and the outer surface at the same time heated into a flow state, remove the heating tool, the outer surface into the inner surface to form a socket lap. Adjust the position of the pipe and fittings so that the pipe and fittings are on the same axis to prevent eccentric welded joints are not strong and airtight. As the PE street only after all the cooling to room temperature to achieve optimal heat strength, cooling period of other external forces will make the pipe, the pipe fittings can not maintain the same axis, thus affecting the quality of fusion, therefore, the cooling period shall not be moved to be connected to the joints or the joints in the application of external forces.

(2) hot melt butt connection, is two identical connection surface with a heated plate to the powder flow state, remove the hot plate and then apply pressure to the connection surface, and under this pressure cooling fixed to form a solid connection. The key to this connection is to adjust the time, temperature, pressure three factors.

(3) different diameter limit PE pipe connection using PE pipe reducer fittings reducer, and then use heat fusion connection.DN>50 more than the PE pipe and other pipes, valves, expansion joints, hydrants and other metal fittings connection, using the same type of flange connection transition DN<50 below the PE pipe and metal pipes, small diameter valve connection, using internal and external inlaid metal threads of the injection molded fittings for the transition. The pressure level of the transition fittings shall not be lower than the nominal pressure of the pipe.