Currently on the market of polyethylene double-wall corrugated pipe with medium density and high density polyethylene material is given priority to, as a result of the industry for many years to form vicious competition, led to the current most of the factory in the raw material of low density polyethylene and adding other fillers, to reduce the cost of materials, but also reduces the pipe quality, in addition, the national standard size of pipes, ring stiffness and impact strength were clear indicators, But some of the three enterprises and legal enterprises to seek price advantages, also use the outside diameter instead of the inside diameter, with low ring steel degree disguised as high ring steel degree pipe to obtain excess profits, plus the construction side is not standardized long work, resulting in bellows construction quality accidents happen from time to time. About the price of Sichuan double wall bellows, different manufacturers will have different pricing, of course, choose such a reliable and long-term cooperation brand like Huida pipe industry will not exist unreasonable quotation. Therefore, to buy the rest assured bellows, it is necessary to carry out a field visit to the manufacturer, clear pipe quality standards.
We generally when choosing the demand of pipes, will pay special attention to the pipe ring stiffness, ring stiffness of different values represents the pipes of different ability to resist external pressure load, we need to know is that important or of ring stiffness values, is to determine the operation of pipe can be smoothly in the construction, so we must be attention. We know that the HDPE double-wall corrugated pipe this pipe, it outdoor drainage engineering in the ring stiffness is very important, not too high, too low also not line, will cause the waste of raw materials, high cost, low is likely to make pipe due to the deformation and damage, so make sure it should be how to better grasp the degrees of ring stiffness values? The following Hui Da pipe industry Xiaobian to give you some suggestions.
First, the principle of the pipe in accepting the load is also more complex, because the plastic pipe is attributed to the flexible pipe, the pipe and the surrounding soil under the external pressure load tube soil effect, in other words, is the pipe and the surrounding soil together to accept the external pressure load.
Second, to determine whether the pipeline can operate normally after laying, the three parameters of load, pipe material and soil are all very important, and the external pressure load is more complex, which mainly includes the static load of soil component and ground, as well as the dynamic load of the transport vehicle during the passage period.
Third, HDPE double wall bellows can be used under external pressure load elements, the laying condition is the first, the selection of ring stiffness not only depends on the external pressure load condition but also depends on the condition of the soil around the pipeline after laying.
Fourth, to ensure that the laying condition is outstanding is not something that can be done, if the laying condition is better, the pipe with lower ring stiffness will not have a lot of deformation, on the contrary, if the laying condition is not good, that is, the use of the pipe with higher ring stiffness may also be too large deformation and compression buckling instability.
Fifth, in general, the diameter of the plastic buried drainage pipe below 500 mm: usually choose the ring stiffness of 8KN/ M2, as long as the geological conditions are good and no transport vehicle load selection of ring stiffness of 4KN/ M2.
Sixth, in the diameter of 500-1200 mm plastic buried drainage pipe: try to choose the ring stiffness of 8KN/m2, if the ring stiffness of 8KN/m2 to be selected below the structure planning accounting, and strict control of the quality of laying construction.
Seventh, it is necessary to ensure the quality of backfill. The compaction of backfill soil should conform to the following rules: the compaction of backfill soil in the main area should not be less than 95%, and the compaction of backfill soil in the secondary pipe area outside the pipeline width should not be less than 90%.
It is necessary to remind you that before selecting the ring stiffness of the double-wall bellows pipe, we should carry out a detailed understanding of all aspects of the pipe. Only by having a detailed understanding of the pipe can we make a better judgment according to its actual situation.
Huida tube industry is a large plastic h building materials enterprise integrating product research and development, production, sales and after-sales service, specializing in the production of PE water supply pipe,PP-R hot and cold water pipe, steel mesh frame pipe, HDPE double wall bellows, HDPE steel band reinforced spiral bellows,CPVC power cable pipe, PVC-U drain pipe, HDPE porous pipe, etc. National hotline: 4001558850
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