Implementation method of petrochemical pipe anti-corrosion insulating layer

Abstract

The invention discloses an implementation method of a petrochemical pipe anti-corrosion insulating layer. The method comprises following steps that firstly, steel pipe surface pretreatment; secondly,defect repairing and sand blasting of structures like a welding line; thirdly, insulating layer laying; fourthly, anti-corrosion layer spraying; fifthly, operation of repeated spraying for two to three times. Liquid rubber spraying paint has the good mechanical property and anti-aging performance; the coating can perfectly wrap substrates, coating is achieved, the substrates are in seamless connection, opening, stripping and falling are avoided, the good protection effect on a base layer is achieved, and a bend, a connector, a valve and other special structures or base layer can be constructedmore simply, conveniently and reliably; in the spraying process, the construction is convenient, efficiency is high, after spraying, instant forming is achieved, and through one-time rapid hardening,a firm is formed. The excellent chemical corrosion resistance is achieved, acid, alkali, salt and chlorine can be resisted, and the method is particularly suitable for anti-corrosion heat preservation of a petrochemical pipe. The pipe anti-corrosion quality is improved, the pipe service life is prolonged, and the safety production is ensured.

Description

technical field [0001] The invention belongs to the technical field of rubber coating, and in particular relates to a petrochemical pipeline anticorrosion method. Background technique [0002] At present, in my country's petroleum refining industry, traditional thermal insulation materials are mostly porous loose materials, such as rock wool, glass wool, perlite, foamed polyurethane, etc. The water absorption rate of this material is very high, up to more than 200%. Some data show that once the water absorption rate exceeds 40%, the insulation effect will be severely damaged. In order to solve the problem of water absorption of this material, a galvanized iron sheet or aluminum sheet with a diameter of 1-2m is usually coated on the insulation material. The direct consequence of this is that the cost will increase significantly, resulting in high production costs and construction difficulties. ; At the same time, this insulation system is not easy to cover the elbows, joints,...

AI Technical Summary

Problems solved by technology

In order to solve the problem of water absorption of this material, a galvanized iron sheet or aluminum sheet with a diameter of 1-2m is usually coated on the insulation material. The direct consequence of this is that the cost will increase significantly, resulting in high production costs and construction difficulties. ; At the same time, this insulation system is not easy to cover the elbows, joints and valves of the pipeline, so that it is exposed to the air and is more susceptible to corrosion

Corrosion not only causes huge economic losses, but also brings many hidden dangers to safe production. Failure to solve the problem of equipment corrosion will seriously affect normal production