Production Technology Of Directly Buried Thermal Insulation Pipe

1, feeding 2, extrusion 3, mold 4, cooling 5, traction 6, internal surface corona treatment 7, cutting 8, inspection 9, finished product
A. Polyethylene pipe easy aging, such as open storage with tarpaulin and other things cover, stacking should be far away from high heat source and fire source, made of heat preservation pipe, prohibit exposure to the sun, sudden cooling, otherwise polyethylene pipe is easy to crack, affect the product performance and service life.
In the process of transportation and pipe piercing, brutal loading and unloading should be avoided, hook too fine, hard, too hard, otherwise easy to cause polyethylene pipe to break, scratch or tear.
The wall thickness of the pipe can be adjusted, and the wall thickness and color can be produced according to user requirements. Due to the different wall thickness, the insulation layer thickness is about, which should be calculated according to the actual thickness.
With the pipe supporting support, plastic plug, two flange, welding rod, welding torch, heat shrinkage belt complete.
The allowable deviations in the table are formulated according to the CJ / 114-2000 industry standard.
The calculation formula is: when the outer diameter is 400mm, the sum of upper and lower deviation =0.1 nominal wall thickness + 0.2 outer diameter 400mm, the sum of upper and lower deviation =0.15 nominal wall thickness + 0.2