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Connection Method of PP Pipe
- Sep 07, 2018 -


Welding method

PP pipe connections commonly used in construction are:

Grind the surface of the joint end of the pipe or piping parts with sandpaper, if there is grease on the surface, wipe it with vinyl chloride or acetone; insert the two ends into the electric welding sleeve, the two ends must be inserted into the middle point of the welding sleeve, insert There must be no water at both ends. Then insert the secondary line of the welding controller to start welding. During the process, the power supply must not be moved or touched and cut off or the secondary wire joint can be loosened. After one hour of welding, the joint is completely cooled. Only press the tube inside and outside the tube to ensure that the joint is not deformed.

Straight pipe must be cut first with a pipe cutter. Make sure that the socket is very flat. The part of the socket end that is inserted into the electric welding sleeve must not be scratched or deformed more than 1mm. The used welding sleeve should not be used again. If the welding sleeve is damaged or deformed, Should not be used for disposal. If the connection fails, the new welding sleeve should be replaced and re-welded. If the welding sleeve fails due to power cut, it should be completely cooled and then plugged in the secondary wire to re-weld. If the welding is completed Immediately add stress to the tube, you can pour cold water to cool it.

End edge welding

In the special case where the welding sleeve cannot be used, the edge welding method must be used. Before the welding, the socket must be cut very flat. Then the edge welding is used, and the welding method and heating time must be completely completed. According to the instructions of each type of welding device and the heating schedule. After the welding is completed, the joint part is cooled, and the inside of the joint of the joint must be flattened, otherwise the debris will accumulate at the joints in the future.

Different material takeover

(1) Pressure ring connector take-up method

A. Flange joint method:

The polypropylene pipe should be joined with other conveying pipes or valves. It should be joined by flanges. First, insert the flange into the polypropylene pipe, connect the flanged end parts with the welding sleeve, and then connect with the other pipe ends. Flange joint.

B. Plug-in mechanical joint (synthetic rubber joint):

Polypropylene pipes and venting pipes, drains, equipment and washing tanks should only be joined by plug-in mechanical joints. The joints must be assembled with the same series of polypropylene pipes and parts, according to the characteristics of their series of products.

C. Connection ferrule takeover method:

When the pipe connection of polypropylene pipe and other materials is such as PP and PVC, PP and cast iron pipe are connected, the pipe can be inserted into the connecting sleeve and then the screw on the connecting sleeve can be fastened, but the pipe diameter specification should conform to the connecting sleeve. size.

D. Other takeovers:

Pipeline connection is required for various applications:

(1) Ring seal plug

(2) Telescopic socket plug

(3) Screw joint