Preparation method of bimetal glued composite tube

Abstract

The invention discloses a preparation method of a bimetal glued composite tube. The preparation method comprises the following steps that S1, decontamination and rust removal treatment is conducted onthe outer surface of a liner tube and the inner surface of a base tube; S2, an adhesive is coated on the outer surface of the liner tube or the inner surface of the base tube or the outer surface ofthe liner tube and the inner surface of the base tube; S3, the liner tube is nested into the base tube and is subjected to pressurizing to enable the base tube, the adhesive and the liner tube to be tightly attached together to form the composite tube; S4, the end of the liner tube of the composite tube and the adhesive at the end of the liner tube are removed, and the adhesive with the depth of 10mm-30 mm between the remaining liner tube and the base tube is removed; S5, the end of the composite pipe is subjected to surfacing treatment, so that the liner tube is connected with the base tube;and S6, the composite pipe is heated. According to the prepared composite tube, the adhesive force strength of the adhesive is good, and the product preparation qualification rate is high.

Description

[0001] Preparation method of double metal glued composite pipe technical field [0002] The invention relates to the field of preparation of bimetallic composite pipes, in particular to a preparation method of bimetallic composite pipes. Background technique [0003] Bimetal composite pipe is composed of two metal pipes of different materials, including inner liner and outer base pipe. Among them, the liner mainly bears corrosion and is usually corrosion-resistant alloys such as stainless steel and nickel-based alloys; the base pipe is used to maintain the strength of the composite pipe and is usually carbon steel. A new type of pipe that is tightly bonded is formed between the pipe layers through various deformation and connection techniques. This type of product is generally used in the field of oil and gas gathering and transportation, and is suitable for laying in deserts, oceans and other environments. [0004] The common products are divided into two categories, whic...

AI Technical Summary

Problems solved by technology

These two types of products have their own advantages and disadvantages. The bonding force between the inner composite pipe base pipe and the liner (coating) is strong and the application range is wide, but the manufacturing cost is relatively high; the manufacturing cost of the lined composite pipe is relatively low. However, the bonding force between the liner and the base pipe is very weak, and the bending curvature is very small, so it is only suitable for pipelines laid in a straight line