Anti-cracking salt chemical equipment pipeline

Abstract

The invention discloses an anti-cracking salt chemical equipment pipeline. The anti-cracking salt chemical equipment pipeline comprises a salt chemical equipment pipeline, wherein a plurality of tight hoops are sequentially arranged on the pipeline outer side wall of the salt chemical equipment pipeline in a sleeving manner in the length direction of the pipeline; the tight hoops are of two-symmetrical semi arc structures; one sides of the tight hoops are connected hinges; the other sides of the tight hoops are fixed through bolts; the tight hoops apply radial prepressure, pointing to the axis, to the salt chemical equipment pipeline; and the radial prepressure is equal to or larger than brine pressure inside the salt chemical equipment pipeline. According to the anti-cracking salt chemical equipment pipeline, through the pressure, radial prepressure is applied to the salt chemical equipment pipeline, the pressure of brine inside the salt chemical equipment pipeline to the salt chemical equipment pipeline is counteracted, even though the pipeline interior of the salt chemical equipment pipeline has pitting corrosion due to the long-term action of brine, pitting corrosion parts do not crack under the compressive stress of brine, and the service life of the salt chemical equipment pipeline is greatly 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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