Advantage of the pre-insulated pipe
|1.||good insulation properties|
|2.||low heat loss|
heat loss is 25% of the traditional pipe.
about 30 yeas move the service life, low cost
has a strong waterproof and corrosive resistance and high mechanical strength
no attached trench ,can be directly buried in the ground or water.
Pre-insulated Pipe Joint on the Construction Site
1.Heat shrinkable belt type sleeve joint
heat shrinkable belt type sleeve joint is made by special import heat shrinkable belt, through the flame heating contraction ,make the tight connection of the HDPE outer protection pipe and the joint sleeve, not only ensure the sealing of joint and water proofing property, and can absorb the axial displacement of the pipe, it requirement of the pipe,it requires simple equipment and instrument and it really convenient and practical for small diameter pipeline.
2.Electric welding type socket connectors
Sleeve joint with electric welding is through special plastic welding equipment to heat the wire embedded in the polyethylene casing, by heating and a certain pressure ,make joint casing and polyethylene outer pipe as a whole system.
Welding tensile strength of the joint is lower than the shell material ,it is stable and reliable ,easy to operate, and can do 100% air test.
We adopt professional electrical control box to make automatic control of heating process, through the control of the different process parameters, optimal melting effect, so as to ensure the quality of welding joint of welding joint and sealing ,and deliver higher axial force.
Installation Method of Pre-insulated Pipe
the temperature of the overall pipeline welding is equal to the temperature of backfilling.
The temperature of the overall pipeline welding is higher than the temperature of backfilling.
3.Preheat Installation Method
Preheat the pipeline before backfilling, when the pipeline is heated to the preheat temperature, than weld the pipeline and backfill.
4.One-time Compensator Installation Method