A corrosion-resistant enamel composite pipe and its manufacturing method

Abstract

The invention discloses a corrosion-resisting enamel composite pipeline and a manufacturing method thereof. Due to adoption of glaze components, it can be guaranteed that an enamel anti-corrosion layer on the inner wall of a hot rolled steel pipe is free of fish-scaling defects. The achievement of the large-size steel pipe inner wall enamel technology and efficient large-scale manufacturing can be guaranteed through an accumulation chain transmission system, a tunnel type continuous firing furnace and other equipment related to the technical scheme. Continuity and integrity of an anti-corrosion structure can be guaranteed through an enamel anti-corrosion layer, a teflon gasket and related structures, all of which are integrally prefabricated. Effective sealing and continuity of the anti-corrosion layer can be conveniently achieved through a butt welding pipe flange with a limiting boss structure and a butt welding pipe flange with a sealing groove structure, and field construction is facilitated. The enamel anti-corrosion layer and a sealing structure cannot be excessively affected by the high welding temperature through an annular heat isolation cavity, and the failure of the anti-corrosion system is avoided.

Description

technical field [0001] The invention belongs to the field of pipeline anticorrosion, and relates to a manufacturing and construction method of a corrosion-resistant enamel composite pipeline. Background technique [0002] Corrosion has always been the primary cause of damage and failure of pipelines in oil and gas industries. [0003] At present, the coatings used for pipeline anticorrosion at home and abroad are mainly organic coatings, such as asphalt, coal tar enamel, and fusion-bonded epoxy powder. Although people are still researching and developing organic coatings with better performance, they cannot fundamentally solve their inherent problems of easy aging and temperature sensitivity, and the anti-corrosion life is greatly limited. [0004] Inorganic non-metallic materials have gradually attracted the attention of people in the pipeline anti-corrosion industry due to their stable physical and chemical properties, no aging, corrosion resistance, wear resistance, temp...

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Problems solved by technology

[0006] Purpose of the invention: The purpose of the present invention is to use the enamel anti-corrosion layer to completely solve the problems of unstable physical and chemical properties, easy aging, and poor weather resistance of organic coatings in the field of pipeline anti-corrosion, and to realize the applicability of the enamel anti-corrosion layer to hot-rolled steel, Integrity, large size and automated efficient manufacturing promote large-scale industrial application of enamel anti-corrosion coatings

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