Flexible composite lining pipe material

Abstract

The present invention relates to a flexible composite lining pipe material, which comprises a pipe material inner layer, wherein the material of the pipe material inner layer is a high density polyethylene material, and the high density polyethylene material comprises, by weight, 100 parts of a high density polyethylene resin, 1-10 parts of inorganic nanoparticles, one or a plurality of materials selected from 2-10 parts of talc powder, 1-9 parts of montmorillonite and 1-10 parts of sepiolite, one or a plurality of materials selected from 1-20 parts of nylon 6, 1-20 parts of nylon 66, 1-20 parts of polyethylene glycol terephthalate and 1-20 parts of glass fiber, and 1-20 parts of high density polyethylene grafted maleic anhydride adopted as a compatibilizer, and / or 1-20 parts of ethylene-octene copolymer grafted maleic anhydride as a compatibilizer. According to the present invention, the flexible composite lining pipe material is provided, which can be used as the water delivery material and the oil delivery material in industrial applications, and can ensure the no change of the material, the increased temperature resistance, the little mechanical property change and the increased thermal performance increasing under the conditions of high temperature and high pressure.

Description

technical field [0001] The invention belongs to the field of industrially applied polymer materials and relates to a flexible composite lining pipe. Background technique [0002] Metal pipelines, as the most important transport media for energy media such as oil, natural gas, coal gas, and liquefied petroleum gas, are buried deep underground all the year round, and are corroded by environmental conditions such as transport media, soil, microorganisms, and the external atmosphere. Especially for oil pipelines, due to the high salinity of crude oil transported, which contains corrosive media such as carbon dioxide and hydrogen sulfide, corrosion and perforation are particularly prominent. layer protection, etc., but as time goes by, corrosion and corrosion-induced strength reduction, pitting and perforation are difficult to avoid, and the existence of these defects will reduce the safety of metal pipeline operation, causing it to leak and be forced to depressurize transportati...

AI Technical Summary

Problems solved by technology

However, the disadvantages of this technology: first, the one-time repair distance is less than 1,000 meters, and cannot pass through the elbow; second, HDPE also has temperature problems in the process of natural gas extraction and transportation

However, at 80°C, even if it is only soaked in water for a few weeks, its mechanical properties will be greatly affected

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