Anti-cracking salt chemical engineering equipment pipeline

Abstract

The invention discloses an anti-cracking salt chemical engineering equipment pipeline. The anti-cracking salt chemical engineering equipment pipeline comprises a salt chemical engineering equipment pipeline body. The outer side wall of the salt chemical engineering equipment pipeline body is sequentially sleeved with a plurality of lock rings in the length direction of the pipeline body. Each lockring is of a structure with two symmetrical semi-circular arcs. One side of each lock ring is connected through a hinge, and the other side of each lock ring is fixed with a bolt. The lock rings haveradial pre-pressing force, pointing to the axis, on the salt chemical engineering equipment pipeline body, and the radial pre-pressing force is equal to or larger than the brine pressure inside the salt chemical engineering equipment pipeline body. According to the above structure of the anti-cracking salt chemical engineering equipment pipeline, the radial pre-pressing force is applied to the salt chemical engineering equipment pipeline body to offset the pressure of brine, inside the salt chemical engineering equipment pipeline body, on the salt chemical engineering equipment pipeline body,even though the inside of the salt chemical engineering equipment pipeline body generates corrosive pitting under the long-term action of the brine, the corrosive pitting positions can not crack under the pressure stress of the brine, and the service life of the salt chemical engineering equipment pipeline body 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 ...

AI Technical Summary

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

Images