Preparation method for bimetallic composite internal anticorrosive pipe

Abstract

The invention relates to a preparation method for a bimetallic composite internal anticorrosive pipe. A bimetallic pipe body is composed of a lining pipe and a base pipe, the base pipe is made of different types of carbon steel according to different purposes, and the lining pipe is an alloy pipe or a metal pipe with corrosion resistance; in the molding process of the bimetallic pipe, different composite methods and lining pipe molding processes are adopted for different base pipe diameters, and the lining pipe is made to be combined to the inner wall of the base pipe; and the molding processof the lining pipe is that the lining pipe is molded by straight seam welding when the base pipe DN is less than 600 mm, and the lining pipe is molded by circular seam splicing when the base pipe DN is larger than or equal to 600 mm. According to the preparation method for the bimetallic composite internal anticorrosive pipe, different composite strategies are adopted for different pipe diameters,a combination process of hydraulic composite and metallurgy is adopted in producing the bimetallic composite internal anticorrosive pipes of larger diameters, the fact that sufficient combining strength exists between the base pipe and the lining pipe can be guaranteed, the product property is excellent, conditions for mass production are provided, and the preparation method for the bimetallic composite internal anticorrosive pipe has high application value and wide application prospects.

Description

technical field [0001] The invention relates to an internal anti-corrosion composite pipe, in particular to a preparation method of a bimetal composite internal anti-corrosion pipe. Background technique [0002] Corrosion-resistant alloy composite steel pipe lined is one of the internal anti-corrosion technologies for pipes. This technology retains the inherent advantages of two different materials, the base pipe and the liner pipe, and complements their inherent deficiencies. The base pipe is used to withstand pressure, and the liner pipe resists Corrosion produced by the transmission medium, and widely used in oil fields, oil refining, chemical and atomic energy and other fields. In the initial stage of the appearance of this kind of anti-corrosion pipe, the metallurgical composite method based on casting and rolling is usually used. However, the production of this process is too high, which affects the application in the field of conveying low flow pressure media. [00...

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Problems solved by technology

[0004] In view of the prior art that uses the explosive composite method for lining corrosion-resistant alloy composite steel pipes, there are deficiencies such as severe deformation of the lining pipe, easy occurrence of bulges or leaks, resulting in lower product quality, etc. The problem to be solved by the present invention is to provide a method for different pipes. Preparation method of bimetal composite inner anti-corrosion pipe with different composite strategies and liner pipe forming

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