APP steel pipeline for chemical corrosion prevention
A pipeline and chemical technology, applied in the field of chemical anti-corrosion APP steel pipelines, can solve problems such as damage, affecting the service life of chemical anti-corrosion pipelines, and unresolved problems, reducing the degree of turbulence and swirl, facilitating the bonding process, and enhancing the paste The effect of blending and thickness
Active Publication Date: 2021-02-19
山东佰盛能源科技有限公司
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Problems solved by technology
The chemical industry pipeline of the present invention is equipped with a secondary filter mechanism, which can precipitate and remove sodium sulfate crystals at the source at a pre-low temperature, thereby avoiding clogging and saving the cost of installing a heating and heat preservation device; the technical solution can work with rust, The coating film is soft and tough, resistant to acid, alkali, seawater, and convenient construction; however, this technical solution does not solve the high temperature formed in the welding process of chemical pipelines, which will damage the structure of the APP resin layer on the inner wall of the pipeline, and then affect Solved the problem of service life of chemical anti-corrosion pipeline
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[0031] As an embodiment of the present invention, the pipe body 1 is also provided with a water-based resin ring 3, and the water-based resin ring 3 is engaged and fixed on the bevel of the APP resin layer 2 at the end of the wedge 12; the water-based resin ring 3 The hardness of the APP resin layer 2 is less than that of the APP resin layer 2; during the welding process of the two pipe bodies 1, the high heat generated in a short period of time will make the APP resin layer 2 rapidly transform into a thermoplastic state, and the thermoplastic APP resin layer 2 in the pipe body 1 Dripping will occur under the action of gravity, which interferes with the uniform bonding distribution of the APP resin layer 2 inside the pipe body 1 during the welding process; the present invention uses the water-based resin ring 3 arranged in the pipe body 1 to make the APP resin at the end of the wedge 12 Layer 2 is supported to prevent the thermoplastic APP resin layer 2 from flowing, which dest...
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The invention relates to the technical field of chemical pipelines, in particular to a APP steel pipeline for chemical corrosion prevention. The APP steel pipeline comprises a pipeline body, a fixed APP resin layer is arranged on the inner wall of the pipeline body, and a flat opening and a wedge opening are formed in the two ends of the pipeline body respectively; and the APP resin layers in twoadjacent pipelines are subjected to a thermoplastic effect due to the high temperature during positioned welding of the two adjacent pipelines, and collapse is generated in the APP resin layers in a cooling process after welding is finished, so that a balanced APP resin layer structure in the pipelines is damaged, the effective service life of the pipelines is further shortened, so that, the APP resin layer with the length larger than that of a pipeline body is arranged in the pipeline body, with the high toughness of the APP resin layer, the APP resin layer is overlapped at a spliced end opening of the pipeline body, then the situation that the stability of the structure of the APP resin layer is damaged due to deformation of the pipeline body caused by heat changes in the welding processand temperature changes in the using environment is avoided, and therefore, the service life of the APP steel pipeline for chemical corrosion prevention is prolonged.
Description
technical field [0001] The invention relates to the technical field of chemical pipelines, in particular to an APP steel pipeline for chemical anticorrosion. Background technique [0002] A large number of pipelines are used to transport chemical solutions in chemical and related manufacturing production. Therefore, corresponding requirements are put forward for the surface quality of pipelines. Anti-corrosion coatings on the surface are often used to isolate the corrosion of chemical materials during pipeline use; but pipelines The material of the surface coating is easily affected by the quality of the paint, and it is difficult to ensure the overall anti-corrosion performance of the pipeline; APP, also known as random polypropylene, is a thermoplastic resin polymerized from propylene, which has high heat resistance, toughness and chemical resistance. Corrosion is very good, it can replace anti-corrosion paint as the anti-corrosion layer of the pipeline, and use its stable...
Claims
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Login to View More IPC IPC(8): F16L9/147F16L13/02
CPCF16L9/147F16L13/02
Inventor 来兴兆陈艳红
Owner 山东佰盛能源科技有限公司