Do you know about pipe connections?
Common pe water pipe connection methods:
- Hot-melt butt joint. The hot-melt butt joint of PE water supply pipe is to use a hot-melt butt welding machine to heat the pipe end. After the pipe end is melted, it will be glued quickly, maintain a certain pressure, and achieve the purpose of welding after cooling.
- Electrofusion connection. The electrofusion connection of PE water supply pipe is to put the electrofusion pipe fittings on the pipes and pipe fittings, and heat the resistance wire embedded in the inner surface of the electrofusion pipe fittings through the electric fusion welding machine, and the heat generated will make the inner surface of the electrofusion pipe fittings and the The outer surface of the socketed pipe is melted and integrated to achieve the purpose of welding.
- Saddle docking. Connecting PE water supply pipes often encounters the problem of branching the main pipe according to actual needs during the application process. Traditional pipes must first cut off a section of the main pipe, and then install a tee to complete the branching. The construction is very cumbersome. For PE pipes, saddle-shaped butt joints are used, that is, saddle-shaped butt welding machines are used to directly connect a saddle-shaped pipe fitting to the main pipe to complete the branching of the main pipe. For main pipe taps with nominal outer diameter less than DN200, electric fusion saddle bypass or straight-through can also be used to carry out under the condition of water stop or non-stop water supply.
- Steel-plastic flange connection. When connecting PE water supply pipes to steel pipes and valves, steel-plastic flanges should be used: PE pipe ends and corresponding plastic support rings can be connected by hot-melt butt joints, and the connection between steel pipe ends and metal flanges should comply with the corresponding According to the steel pipe welding regulations, the connection between the PE pipe and the steel pipe can be completed by using the flange piece.
Do you know how to operate hot melt butt joint?
Hot-melt connection refers to the use of polyethylene pipes and pipe fittings that can be connected by hot-melting, and the strength of the connection can exceed the body strength of the pipes and fittings. This connection is possible with pipes of polyolefin material, with outstanding advantages.
- Butt-type hot melt connection
The butt-type hot-melt connection method is generally used for pipes with a diameter of 63MM or more.
The butt-type hot-melt connection is to heat two pipes or a pipe and a butt-type HDPE pipe fitting with a butt machine through a heating plate, and then butt-weld as a whole, and it can be fixed after cooling. Before welding, make sure that two HDPE water supply pipes or one pipe and HDPE butt fittings are kept in a straight line, and the pipe section should be flat. - Socket type hot melt connection
The socket-type hot melt connection is suitable for pipes and fittings with relatively small diameters (generally below DN63mm), because the pipes and fittings with small diameters have thin walls and small cross-sections, and it is difficult to ensure quality by using butt joints.
The socket-type hot-melt heat capacity connection of HDPE pipe uses a small hot-melt device to heat the pipe end and the socket-and-socket pipe at the same time. After melting, insert the HDPE pipe into the pipe fitting, press the two parts that need to be connected, and keep it cool. It can be fixed.