Inner wall anti-corrosive construction process of buried pipeline
A technology for construction technology and buried pipelines, which is applied in pipeline anti-corrosion/rust protection, damage protection, pipeline protection, etc. It can solve the problems of short construction process distance, lack of anti-corrosion effect, and damage to the anti-corrosion coating on the inner wall, etc., to achieve The effect of shortening the construction period, improving the quality of anticorrosion and construction efficiency, and reducing costs
Active Publication Date: 2012-01-25
SHAANXI TIANYUAN PETROCHEM CONSTR ENG
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Problems solved by technology
[0002] In the background technology, the internal coating of liquid paint for steel pipelines is air-conveyed and internally extruded. The oil industry has formulated a corresponding standard SY / T4076-95. This process of SY / T4076-95 is not suitable for the inner wall of long-distance buried pipelines. In addition, welding is used between the two heel pipes during the construction process, which destroys the anti-corrosion coating on the inner wall and forms leaks, which cannot achieve effective anti-corrosion effects, and the construction process distance is too short, so it is only suitable for prefabrication in factories
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[0011] The utility model will be described in detail with reference to the drawings.
[0012] See figure 1 , The process steps for realizing the present invention are: cleaning pipeline→pipe cleaner→sand blasting and derusting→first coating→second coating→inspection.
[0013] 1. Clean the pipeline
[0014] It uses compressed air to clean the inner wall of the pipeline and remove the debris in the pipeline. The time for cleaning the pipeline can be determined according to the cleaning situation.
[0015] 2. Pass the ball:
[0016] According to the inner diameter of the pipeline, select the corresponding high-elastic wear-resistant rubber ball from one end of the pipeline and drive it out from the other end. According to the result of the ball passing, the welding quality of the pipeline is judged, which is the basis for the next internal extrusion process.
[0017] 3. Sandblasting and rust removal:
[0018] The sandblasting operation uses high-hardness quartz sand driven by compressed air...
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The invention relates to an overall anti-corrosive process of a pipeline, in particular to an inner wall anti-corrosive construction process of a buried pipeline. The traditional anti-corrosive construction process is not suitable for the inner wall anti-corrosion of the long-distance buried pipeline, two pipelines are welded in a construction process, an anti-corrosive coating of an inner wall is damaged to form leak points, the effective anti-corrosive function cannot be achieved, and the construction process has too short distance, and is only suitable for factory prefabrication. The innerwall anti-corrosive construction process of the buried pipeline comprises the following steps: pipeline cleaning->pipe cleaner->sand-blasting->primary coating->secondary coating->inspection. The construction process is suitable for field construction, can form an overall and continuous coating structure in the 3 to 5km pipeline, greatly improves the anti-corrosive quality and the construction efficiency, is quick and simple, has low investment, greatly shortens the construction period, and reduces the cost.
Description
1. Technical Field [0001] The invention relates to an overall anti-corrosion process for pipelines, in particular to an anti-corrosion construction process for inner walls of buried pipelines. 2. Background technology [0002] In the background art, the petroleum industry has formulated the corresponding standard SY / T4076-95 for the inner coating of liquid coatings of steel pipelines, air conveying and internal extrusion coating. The SY / T4076-95 process is not suitable for the anti-corrosion of the inner wall of long-distance buried pipelines. In addition, welding is used between the two pipes during the construction process, which destroys the anti-corrosion coating on the inner wall and forms a leakage point, which does not have an effective anti-corrosion effect, and the construction process distance is too short, which is only suitable for prefabrication in the factory. 3. Summary of the invention [0003] In order to solve the deficiencies in the above-mentioned background te...
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IPC IPC(8): F16L58/02B05C7/08
Inventor 王春生王春昌赵文博
Owner SHAANXI TIANYUAN PETROCHEM CONSTR ENG