Soldering polypropylene pipes

Instruments

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  1. Welding machine.
  2. Polypropylene pipes and fittings
  3. Special scissors.
  4. Measuring tape and pencil.
  5. Soldering nozzles for pipes of different diameters.
  6. Mittens or gloves to avoid burns.

Step-by-step instructions for soldering polypropylene pipes:

  1. Install the required sleeves according to the diameter of your connections on the disconnected soldering machine.

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  1. Switch on the welding machine. Set the temperature on the thermostat from 240 to 260° C.
  2. It takes a few minutes for the device to warm up. Turning off the indicators on the welding machine or turning on the green light indicates that the machine is ready to work.
  3. Measure and cut the required pipe length with scissors. The cut angle of the mating parts must be equal to 90°.

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  1. On the pipe, before brazing, make a mark equal to the fitting depth. Degrease the surface of the parts to be soldered.
  2. Using the table of parameters of the welding process for polypropylene pipes, select the required pipe diameter and see the rest of the parameters.

Attention. Overheating of the connected elements can lead to their deformation. Observe the times indicated in the table.

Welding process parameters

Pipe diameter, mm

Welding depth, mm

Heating time, sec

Welding time, sec

Cooling time, min

20

14

5

4

3

25

16

7

4

3

32

20

8

4

4

40

21

12

6

4

50

22.2

18

6

5

63

24

24

6

6

75

28.5

30

8

8

90

33

40

8

10

110

39

50

10

10

  1. Insert evenly and simultaneously connected parts into the nozzle for the time indicated in the table.

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  1. After the required heating time has elapsed, remove the parts to be welded without twisting movements.

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  1. Connect the parts without delay. Then let the connection cool down. Do not correct the position of the parts after the heated polymer has been set.

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Brazing reinforced polypropylene pipes are produced using the same technology but with their own nuances. Usually, products made of reinforced polypropylene pipes have an increased diameter and do not fit the standard nozzles of the welding machine. Before the soldering process, they need to be cleaned using a device in a metal sleeve with knives. This device is put on the end of the pipe, and the reinforced layer is scraped off with rotary movements around the axis to clean plastic.

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Another fixture is used on pipes containing a reinforced layer in the center.

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