How to Weld Electrofusion HDPE fittings

How to weld electrofusion pe fittings? There are some tips for the welding of the HDPE pipe fittings, it will be useful for the welders, pls pay attention to the tips to save your time and improve your efficiency.

Welding requirements for welding PE electrofusion pipe fittings

First: prepare special tools, the outside of the pipe must be roughened, and the depth of the socket must be marked.

Second: Before construction, in order to ensure the welding effect, do a welding stripping test to adjust and guide the correct parameters before construction, so as to ensure the smooth completion of the construction period.

Third: the power cord is welded with a pipe fitting below 200 meters. If it is less than 30 meters, you can use a four-square cable. If it exceeds 30 meters, you must use a cable of more than six square meters. The longest is 100 meters. Use a multimeter to measure the welding work. Whether the output voltage is above 220, welding accessories above 200 must use six square cables over 50 meters, use ten square cables, and accessories over 315, it is recommended to use 380 volts power supply, so as not to cause pipe fittings virtual welding to avoid unnecessary losses.

Fourth: After the welding is completed, press the pipes and fittings according to the pressure level. During the pressing process, an exhaust valve must be installed about 50 meters in the pipeline to ensure that the pressurized air can be discharged normally.

Fifth: After the construction welding is completed, press first and then backfill to avoid unnecessary losses.

Sixth: The pressure should be divided into three parts, the first is to inject water, the second is to pressurize, and the air is exhausted, and the third, when the pressure reaches 3 kg, pause for three minutes and then inject water to ensure that there is no air in the pipe, and then press normally until the pipe is The standard pressure of the pipe fittings is qualified if the pressure is maintained for more than six hours and the pressure does not drop. Then, press according to the pressure level of the pipe fittings. During the pressing process, an exhaust valve must be installed about 50 meters in the pipeline to ensure that the pressurized air can be discharged normally.

Fifth: After the construction welding is completed, press first and then backfill to avoid unnecessary losses.

Sixth: The pressure should be divided into three parts, the first is to inject water, the second is to pressurize, and the air is exhausted, and the third, when the pressure reaches 3 kg, pause for three minutes and then inject water to ensure that there is no air in the pipe, and then press normally until the pipe is The standard pressure of the pipe fittings is qualified if the pressure is maintained for more than six hours and the pressure does not drop.

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