Nonmetal heat preservation composite pipe

Abstract

The invention provides a heat preservation composite pipe, in particular to a high-strength nonmetal heat preservation composite pipe which comprises a conveying layer, and a channel for conveying materials is arranged in the middle of the conveying layer; the outer wrapping layer wraps the outer part of the conveying layer; and a strength structure disposed between the transport layer and the outer cladding, the strength structure supporting the transport layer and the outer cladding; wherein the strength structure is made of a non-metal material. The pressure-bearing strength and the tensile property of the composite pipe can be remarkably improved, the stability and the durability of the heat preservation interlayer are enhanced, the defects of the outer cladding in the aspects of strength, heat insulation property and surface tensile tearing property are overcome, and the fireproof and flame-retardant effects are achieved.

Description

technical field [0001] The invention relates to a thermal insulation composite pipe, in particular to a high-strength non-metal thermal insulation composite pipe, which belongs to the field of oilfield transportation. Background technique [0002] Oilfield transportation non-metallic pipes are generally made of ethylene polymer resin materials, which have poor heat resistance and thermal insulation properties. This non-metallic material is a kind of thermoplastic resin with high crystallinity and non-polarity. and properties of industrial chemicals. Not only has good economy, but also has good insulation, acid resistance, alkali resistance, oxidation resistance and other properties. It is a replacement product for traditional steel and is widely used in the field of strong acid, strong alkali, and oxidizing material transportation. The crude oil produced in Shunbei Oilfield is waxy crude oil. The single-well wellhead adopts the unheated gathering and transportation process....

AI Technical Summary

Problems solved by technology

For pipelines protected by polyethylene lining, polyethylene pipes have simple structure and single function, and have defects in strength, heat insulation, and surface tensile tear resistance. As a thermoplastic resin, polyethylene pipes cannot The direct high-temperature foaming polyurethane insulation material between the interlayers of the connecting pipes has greatly restricted the environment and conditions of its use, resulting in a relatively single scope of application and shortening the service life of polyethylene pipes

Images