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  4. Development history of plastic double-wa...

Development history of plastic double-wall corrugated pipe

Development history of plastic double-wall corrugated pipe

Plastic bellows was first developed in the 1950s, and has developed by leaps and bounds in the last 20 years. The plastic bellows that have been developed and applied can be divided into "HDPE bellows", "UPVC bellows" and "PP bellows" according to the materials used to produce plastic bellows. .
The plastic bellows adopts a special "ring groove" shaped cross-sectional form in its structural design. This kind of pipe has a novel design and a reasonable structure, which breaks through the traditional "plate" structure of ordinary pipes, so that the pipes have sufficient compression and impact resistance Strength, but also has good flexibility. According to the different structure of plastic bellows, bellows can be divided into single-wall bellows and double-wall bellows. Single-wall plastic corrugated pipe refers to a pipe with corrugated material on both the inner and outer walls of the plastic pipe. It has high rigidity, can be bent arbitrarily, and can be rolled in unlimited lengths. Double-wall corrugated pipe refers to a plastic pipe with a smooth inner wall and a corrugated outer wall (the corrugated shape can be right angle, trapezoidal, sinusoidal, etc.). It is formed by simultaneously squeezing the corrugated outer wall and a layer of smooth inner wall. . In addition to its characteristics of good corrosion resistance, high insulation, smooth inner wall and low flow resistance, it has special hollow ring rigidity and good strength and toughness. Under the same strength and rigidity requirements, the use of double-wall corrugated pipes can save materials by 30% -50% compared to ordinary plastic pipes. It has better technical economy, and is easy to transport and install, which reduces the labor intensity of construction personnel and also reduces The total investment of the project, but the degree of winding is small. Application of corrugated pipe: Single-wall corrugated pipe can be widely used for drainage and permeation under light loads such as golf courses and sports fields; indoor decoration wire bushings; automotive wire bushings; prestressed anchor cable bushings; air conditioner drain pipes, etc. . Double-wall corrugated pipes can be widely used in highways, slopes, golf courses and other heavy load drainage and permeation; municipal sewage; communications, power supply cable casing and other occasions.

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