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Production process of HDPE double wall bellows

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Production process of HDPE double wall bellows

Release date:2018-03-01 Author: Click:

Production process of HDPE double wall bellows



GHFB type high voltage power cable protection of single wall corrugated pipe is a new type of light pipe with high density polyethylene as raw material, has the advantages of light weight, high pressure resistance, good toughness, fast construction, long life and other characteristics, the wall structure design excellent, large diameter corrugated pipe compared with other structural materials, cost reduction. And because of the convenient and reliable connection, it has been widely used at home and abroad. The Ministry of construction stipulates that the use of confined concrete pipes should be limited in the use of buried pipes, and the large-diameter HDPE bellows shall be recommended. The prospect is optimistic, which is the upgrading of concrete pipes and cast iron pipes.


GHFB square type high voltage power cable protection single wall bellows production process:


The general GHFB square high voltage power cable protection single wall bellows process has been guaranteed, its devices are polymerized and vinyl chloride and so on, and the characteristic materials are filtered, compressed and condensed, high pressure water cleaned, graded adjustment and so on.


The main steps are divided into two segments, prepolymerization and polymerization. Large diameter corrugated pipe when the reaction conversion rate of 60% to 85% (according to the formula and decide when to stop the reaction) and monomer polymerization kettle in the degassing and recovery of the unreacted, then in autoclave stripping, further removal of residues in the pipe, the air conveying system will powder tube to grade homogenization and packing process, so the process it is the same, there are different.


GHFB square high voltage power cable protection single wall bellows how to calculate wall thickness:


First you see first bellows shape, he is the shape of the curve, peak valley, peak measurement can not represent the same wall thickness, measuring the valley value cannot represent the wall thickness, usually we will take the middle average, right for the single wall corrugated pipe is like this, but the large diameter corrugated pipe double wall corrugated pipe we have different problems, he more than a layer of thick wall ah, this is actually the industry is also possible, after all the time together with the inner wall of the volume measurement together, so the measured wall thickness can be, this is only relative wall thickness. In fact, we mainly see his ring stiffness, the natural wall thickness is a little bit, the ring stiffness is stronger, so it is considered to be relatively simple in the industry.


GHFB square type high voltage power cable protection single wall bellows physical performance:


1, GHFB square type high voltage power cable protection single wall bellows unique structure, high strength, compression and impact resistance.


2, GHFB square type high voltage power cable protects the inner wall of single wall bellows smooth, friction and excessive flow.


3, GHFB square type high voltage power cable protection single wall bellows connection is convenient, the joint is sealed well, no leakage.


4, GHFB square type high voltage power cable protection single wall corrugated pipe weight is light, the construction is quick, reduce the cost.


5, GHFB square type high voltage power cable protection single wall corrugated pipe buried service life for more than fifty years.


6, GHFB square type high voltage power cable protection single wall bellows polyethylene belongs to hydrocarbon polymer, molecular polarity, acid alkali corrosion resistance.


7, GHFB square type high voltage power cable protection single wall corrugated pipe material is green environmental protection material, non-toxic, non corrosion, no fouling, can be recycled and reused.


8, the GHFB type high voltage power cable protection single wall bellows is suitable for wide temperature range. The pipeline at -60 C is not cracked, and the highest temperature of the transmission medium is 60 C.


9, GHFB square type high voltage power cable protection single wall corrugated pipe comprehensive engineering cost and concrete basically equal, operation cost is low.


10, GHFB square type high voltage power cable protects single wall bellows without foundation under the condition of good soil quality.


GHFB square type high voltage power cable protection single wall bellows


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