Cracking-resistant salt and chemical making equipment pipe

Abstract

The invention discloses a cracking-resistant salt and chemical making equipment pipe. The cracking-resistant salt and chemical making equipment pipe comprises a salt and chemical making equipment pipe body, wherein a plurality of tightening rings sequentially sleeve the outer side wall of the salt and chemical making equipment pipe body along the length direction of the slat and chemical making equipment pipe body; each tightening ring consists of two symmetric half arcs; one sides of the tightening rings are connected to one another through hinges; the other sides of the tightening rings are fixed through bolts; the tightening rings apply a radial pre-compression force pointing to an axis to the salt and chemical making equipment pipe body; and the radial pre-compression force is equal to or greater than pressure of brine in the salt and chemical making equipment pipe body. By the structure, the radial pre-compression force is applied to the salt and chemical equipment pipe body of the cracking-resistant salt and chemical making equipment pipe, pressure of the brine in the salt and chemical making equipment pipe body on the salt and chemical making equipment pipe body is counteracted, even if the inside of the salt and chemical making equipment pipe body is subjected to pitting corrosion under a long-term effect of the brine in the salt and chemical making equipment pipe body, the circumstance that pitting corrosion portions crack due to pressure stress of the brine is avoided, and the service life of the salt and chemical making equipment pipe body is prolonged.

Description

technical field [0001] The invention relates to the field of salt chemical equipment pipelines, in particular to a crack-proof salt chemical equipment pipeline. Background technique [0002] Corrosion and cracking of equipment is a major problem in the production of salt chemical enterprises. The reason why there are various corrosion and cracking problems in salinization equipment is in the final analysis related to its extremely harsh working environment, which is mainly reflected in the following aspects: [0003] (1) Chloride ion concentration [0004] The concentration of chloride ions in brine is extremely high, which is the root cause of stainless steel corrosion. Common environmental failure modes of stainless steel components such as pitting corrosion, intergranular corrosion, crevice corrosion, stress corrosion cracking, and corrosion fatigue fracture are all related to the presence of chloride ions in the solution. [0005] Existing studies have shown that even ...

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Problems solved by technology

[0020] (2) Corrosion fatigue

However, in the stage of crack initiation, the components contributed by chemical action and mechanical action are completely different. This stage is mainly controlled by chemical action. Under the condition that environmental corrosion factors cannot be changed, crack initiation is inevitable, and it is necessary to delay crack initiation. The practice does not significantly improve the service life of components

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