Double-wall corrugated pipe Detailed Introduction

Double-wall corrugated pipe Detailed Introduction

1.Double-wall corrugated pipe

High-density polyethylene (HDPE) double-wall corrugated pipe, is a new type of pipe with a ring-like structure of the outer wall and smooth inner wall, first developed in Germany in the early 80s. After more than ten years of development and improvement, it has been developed from a single species to a complete series of products. Currently in the production process and the use of technology has been very mature. Because of its excellent performance and relatively economic cost, in Europe and the United States and other developed countries have been greatly promoted and applied. In China, the promotion and application of HDPE double-wall corrugated pipe is in an upward trend stage, the technical indicators have reached the use of standards. Double-wall corrugated pipe inner wall colour is usually blue and black, some brands will use yellow inner wall.

Chinese name double-wall corrugated pipe

Development time 1980s

Developing country Germany

Process characteristics Digital centralised control of the entire line

Applications Water supply, drainage, sewerage, air venting

Advantages Light weight, low drainage resistance, high compressive strength

2. Advantages of double-wall corrugated pipe

-Reasonable structure and beautiful appearance

-Temperature resistance -40℃-60

-Small resistance, large flow rate

-Flame retardant force -Long service life

-Reliable health performance

-Comprehensive low cost -Acid and alkali corrosion resistance

-High strength, strong seismic performance

-Energy saving and consumption reduction

-Convenient installation and transport

3. Feature

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High density polyethylene (HDPE) has excellent chemical stability, aging resistance and resistance to environmental stress cracking. HDPE double-wall corrugated pipe produced from its raw material is a flexible pipe. Its main properties are as follows:

Strong resistance to external pressure

The outer wall is a ring-shaped corrugated structure, greatly enhancing the pipe's ring rigidity, thus enhancing the pipe's resistance to soil loads, in this performance, HDPE double-wall corrugated pipe has obvious advantages compared with other pipes.

Low project cost

Under the condition of the same load, HDPE double-wall corrugated pipe only needs thinner wall to meet the requirements. Therefore, with the same material specifications of the solid wall phase pipe than, can save about half of the raw materials, so HDPE double-wall corrugated pipe cost is also lower. This is another outstanding feature of the pipe.

Convenient construction

As HDPE double-wall corrugated pipe is light in weight, it is easy to carry and connect, so the construction is quick and the maintenance work is simple. In the tight schedule and construction

In the case of tight schedule and poor construction conditions, its advantages are more obvious.

Small coefficient of friction, large flow

HDPE double-wall corrugated pipe made of HDPE can pass a larger flow than other pipes of the same calibre. In other words, under the same flow requirement, HDPE double wall corrugated pipe with relatively small calibre can be used.

Low temperature and impact resistance

The embrittlement temperature of HDPE double wall corrugated pipe is -70℃. General low-temperature conditions (-30 ℃ or more) construction without having to take special protective measures, winter construction is convenient, and, HDPE double-wall corrugated pipe has good impact resistance.

Good chemical stability

Because HDPE molecules have no polarity, so the chemical stability is excellent. In addition to a few strong oxidising agents, most chemical media do not play a destructive role. General use of the environment of soil, electricity, acid and alkali factors will not make the pipeline damage, do not breed bacteria, do not scale, and its circulation area will not be reduced with the increase in operating time.

Long service life

Under the condition of not being exposed to sunlight and ultraviolet rays, the service life of HDPE double-wall corrugated pipe can reach more than 50 years.

Excellent abrasion resistance

Germany has proved with tests that the abrasion resistance of HDPE is even several times higher than that of steel pipes.

Appropriate deflection

A certain length of HDPE double-wall corrugated pipe axial direction can be slightly deflection, not subject to a certain degree of uneven settlement of the ground, can be laid directly in the trench without pipe fittings is not straight and so on.