Qingdao Yehua Plastic Machinery Co.,Ltd

High quality product, professional service, being the core supplier in laser industry!

Home > News > Content
Several Common Connection Methods Of PE Feed Water Pipe
- May 03, 2017 -

1216614952411pic1.jpg

PE water supply pipe connection method:
Polyethylene pipe and pipe, pipe and pipe, pipe and accessories, and polyethylene pipe and metal pipe connection between many ways, different ways to have their own advantages and limitations, the user can according to the pipe diameter, working pressure , The use of places and other environments, select the appropriate connection. Urban water supply Polyethylene pipe The most commonly used connection methods are: hot melt connection, fused connection, socket-type flexible connection, flange connection, steel-plastic transition joint connection.


1, hot melt connection
Hot-melt connection is a special heating tool, under pressure in the polyethylene pipe or pipe fittings to be connected to the part to be melted, remove the heating tool, the pressure of the two melting surface together, under a steady pressure to maintain For a while until the joints cool. Hot melt connections include hot melt butt connection, hot melt socket connection, hot melt saddle connection.


2, fused connection
Fused connection is the use of embedded resistance wire of the special fuse and PE pipe or pipe fittings in close contact with the power supply, PE pipe through the embedded resistance wire heating connection parts, so that even as a melting, until the joint cooling. The fused connection can be used for connection to polyethylene tubing or socket fittings with different types and different melt flow rates. The fused connection is divided into fused socket connection and fused saddle type connection.


3, socket-type flexible connection
Polyethylene pipe socket flexible connection is a new type of connection method developed by referring to the principle of flexible connection of cast iron pipe and PVC pipe (PVC-U). PE pipe is welded at one end of polyethylene pipe. Polyethylene socket. Socket-type flexible connection is one end of the polyethylene pipe directly into the tube or pipe fittings in a special socket, through the socket within the locking ring compression pull, rubber seal tight seal to achieve the purpose of connecting PE pipe and pipe The


4, flange connection
Flange connection is mainly used for polyethylene pipe and metal pipes or valves, flow meters, pressure gauges and other ancillary equipment connection. Flange connection mainly by the polyethylene flange connector, steel or aluminum back pressure jacket flange, steel or aluminum flanges, gaskets or seals, bolts, nuts and other components. Flange connection is through the fastening bolts, nuts, flange connections and flange pieces in close contact to achieve the purpose of connection.


5, steel-plastic transition joints connected
The steel-plastic transition joint is connected to a polyethylene pipe and a metal pipe by cold or other prefabricated steel-plastic transition joints. Steel-plastic transition joints have anti-pull locking rings and seals, usually require a good sealing performance and resistance to drawing, pressure resistance is greater than the system of polyethylene pipe.
The above is the PE pipe connection, need to pay attention to is strictly prohibited in any form directly in the polyethylene pipe, pipe fittings on the car thread, threaded connection; is prohibited to use open flame baking polyethylene pipe, pipe fittings, direct connection.
Developed today, the connection technology of polyethylene has been very mature and reliable. Statistics show that the leakage rate of polyethylene pipe less than two hundred thousandths, far less than ductile iron pipe 2-3%, a substantial increase in the safety and economic benefits of the pipeline, which is more gas pipeline The use of polyethylene tube is a very important reason.


Bonding method
1. Pipe, pipe fittings before bonding, the application of dry cloth will be the mouth side of the mouth and the mouth of the wipe treatment, when the surface sticky oil must be wiped with acetone clean.
2. Pipe section should be flat, vertical tube axis and chamfering; bonding should be painted before the mark and insert the trial line, try to insert the depth can only be inserted into the original depth of 1/3 to 1/2, When the gap is too large, use the bonding method.
3. Apply adhesive, you should first apply the inside of the socket, after applying the outside of the socket,
The mouth should be evenly applied in the axial direction from the inside to the outside, even if it is not applied or applied in excess (200g / m2).
4. After applying the adhesive, it is advisable to keep the applied external force within 1 minute, keeping the straightness and position of the interface correct.
5. After the bonding is completed in time to squeeze out the excess adhesive wipe, in the curing time shall not be forced or forced to load.
6. Bonding joints shall not be in the rain or water construction, not at 5 ℃ below the operation.
7. Connection procedure: preparation → cleaning work surface → test plug → brush adhesive → adhesive → maintenance.