Reinforced polyethylene complex pipeline

Abstract

The invention relates to the technical field of oil, gas and chemical. A reinforced polyethylene complex pipeline comprises a carbon steel pipe layer, a high-density polyethylene layer and an ultra-high molecular weight polyethylene layer which are sequentially arranged from outside to inside, wherein the ultra-high molecular weight polyethylene layer and the high-density polyethylene layer are formed by melting ultra-high molecular weight polyethylene and high-density polyethylene at high temperature and high pressure and then co-extruding and forming through two die heads; a base pipe of the high-density polyethylene layer extends to the outer edge of a flange plate end surface of the carbon steel pipe layer along a pipe port in an outer layer; the carbon steel pipe layer, the high-density polyethylene layer and the ultra-high molecular weight polyethylene layer are integrally formed. The reinforced polyethylene complex pipeline is simple in structure, convenient to mount and connect, and low in use cost; the steel pipe layer and the high-density polyethylene layer at the outer layer can bear big pressure; the ultra-high molecular weight polyethylene layer at an inner layer has the effects of resisting abrasion, resisting impacting, resisting corrosion and self-lubricating. The abrasion resistance of the reinforced polyethylene complex pipeline is improved 7 to 10 times by being compared with that of a common metal conveying pipeline, thus the service life can be greatly prolonged, and the production efficiency is improved.

Description

technical field The invention relates to the technical field of oil and gas chemical industry, in particular to a reinforced polyethylene composite pipe used in the oil and gas chemical industry for the transportation of oil, gas and related materials. Background technique In recent years, plastic pipes have developed rapidly, and many new types of plastic pipes are being popularized and applied. It is a major trend to replace steel with plastic. As a new material with particularly excellent properties, ultra-high molecular weight polyethylene pipes are gradually recognized by the market. But at present, domestically produced polyethylene plastic pipes are mostly used in gas and water projects in the fields of gas, chemical industry, tap water, power plants, aluminum plants and the like. However, in the fields of gold mine, copper mine, coal mine, salt lake chemical industry, oil and gas chemical industry, etc., the friction of the powder material on the pipe is relatively...

AI Technical Summary

Problems solved by technology

It is necessary to re-purchase pipes and re-lay pipes, again consumin

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