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PP duct welding method

Views:28     Author:China xicheng     Publish Time: 2021-03-31      Origin:China xicheng

The PP pipe connection methods commonly used in construction are


Use sandpaper to remove the surface layer of the joint ends of the PP pipe or piping parts. If there is grease on the surface, use vinyl chloride or acetone to wipe clean; insert both ends into the welding sleeve, and the two ends must reach the middle point of the welding sleeve. There must be no water at both ends of the welding. Then insert the secondary wire of the welding controller to start welding. Do not move or touch during the process to cut off the power or loosen the secondary wire's joint. One hour after the welding is completed, the cooperative will be cooled entirely. It can be pressurized in the tube, and the line can be pulled from the outside to ensure that the joint does not deform.

The straight pipe must be cut with a pipe cutter first, and the socket must be very flat. The part of the socket end inserted into the welding sleeve must not be scratched or deformed by more than 1mm. The used welding sleeve must not be used again if the welding sleeve is damaged or warped, Should be discarded and must not be used. If the connection fails, a new welding sleeve should be replaced and re-soldering. If the welding sleeve fails due to the power cut during the process, wait for the complete cooling before plugging in the secondary wire and re-welding. Immediately stress on the tube, and you can pour cold water to cool it down.

Products made by PP sheet


Edge welding

In exceptional cases where the welding sleeve cannot be used, the edge welding method must be used. Before welding, a pipe cutter must be used to cut the socket very flat. The wedge welder is used for welding, and the welding method and heating time must be complete. Follow the instructions and heating schedule of each type of welding machine. After the welding is completed, until the joint is cooled, the inside of the joint must be flattened. Otherwise, debris will accumulate in the joint and cause blockage in the future.


 Pressure ring joint connection method

A. Flange joining practice:

Flanges should join polypropylene pipes and other conveying pipes or valves. First, the flange is sleeved on the polypropylene pipe, and the flange joint parts are connected by electric welding, and then it is connected with other pipe ends—flange joints.

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

Polypropylene pipes and vent pipes, drains, equipment, and sinks should only be joined with plug-in mechanical joints. The joints used must be the same series of products as the polypropylene pipes and parts and assembled according to the characteristics of the products' features.

C. Connection socket connection method:

When connecting polypropylene pipes and other materials such as PP and PVC, PP and cast iron pipes, insert the pipe into the connection sleeve and then tighten the screws on the connection sleeve. Still, the pipe diameter specification should meet the connection sleeve size.

D. Other takeovers:

Application of various purposes requires pipelines to be connected.

(1) Ring seal plug

(2) Telescopic socket connection

(3) Threaded joint


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