pe pipe welding method 800 how to weld

1, the preparation before welding: check whether the power supply of the hot melt machine is connected, whether the milling cutter can cut, whether the heating plate heating is normal, whether the rack cylinder is running.

2, welding:

Remove the dirt (oil, dust, mud, water) from the pipe ports; place the pipe (pieces) in the rack kava; mill the end face of the pipe (pieces) with the milling cutter disk; measure the rack cylinder torque power; check whether the temperature of the heating plate reaches the temperature value of 190-230 between 210 ± 10 ℃ at room temperature; put the heating plate into the rack; reduce the fusion pressure ( 0.02Mp); time to reach the rapid switch; the pressure will be raised to meet certain requirements, generally 2-3Mp, depending on the cylinder torque; pressure cooling.

Expanded Information

pe pipe characteristics

1, reliable connection: polyethylene piping system is connected by electro-thermal fusion, the strength of the joints is higher than the strength of the pipe body.

2, good low-temperature impact resistance: polyethylene's low-temperature embrittlement temperature is very low, can be used safely in -60-60 ℃ temperature range. During winter construction, no pipe brittleness will occur because of the good impact resistance of the material.

3, good resistance to stress cracking: HDPE has a low notch sensitivity, high shear strength and excellent scratch resistance, resistance to environmental stress cracking performance is also very outstanding.

4, good chemical resistance: HDPE pipes can resist corrosion of a variety of chemical media, the presence of chemicals in the soil will not cause any degradation of the pipeline. Polyethylene is an electrical insulator, so there will be no rot, rust or electrochemical corrosion phenomenon; in addition it will not promote the growth of algae, bacteria or fungi.

5, aging resistance, long service life: containing 2-2.5% of uniformly distributed carbon black polyethylene pipe can be stored or used outdoors in the open air for 50 years, will not be damaged by ultraviolet radiation.

6, good abrasion resistance: HDPE pipe and steel pipe abrasion resistance comparison test shows that the abrasion resistance of HDPE pipe for the steel pipe 4 times. In the field of mud transportation, compared with steel pipe, HDPE pipe has better wear resistance, which means HDPE pipe has a longer service life and better economy.

7, good flexibility: HDPE pipe flexibility makes it easy to bend, engineering can be changed by changing the direction of the pipeline way around obstacles, in many cases, the flexibility of the pipe can reduce the amount of pipe fittings and reduce the cost of installation.

8, easy to handle: HDPE pipe is lighter than concrete pipe, galvanized pipe and steel pipe, it is easy to handle and install, lower manpower and equipment needs, means that the installation cost of the project is greatly reduced.