Pipe end reserved treatment method for steel pipe anti-corrosion outer coating

Abstract

The invention discloses a treatment method for a steel tube corrosion-prevention outer coating tube end reserved portion and belongs to the technology of steel tube corrosion-prevention treatment. The existing method of removing steel tube end portion corrosion-prevention layers on construction sites is low in operating efficiency, incomplete in removal and large in energy consumption. According to the treatment method, a shielding object is wound on the reserved portion at the tube end of a steel tube and shields the reserved portion at the tube end of the steel tube, then, a corrosion-prevention outer coating is sprayed on the outer surface of the steel tube, and finally the shielding object is peeled off and the reserved portion at the tube end of the steel tube is exposed. According to the treatment method, the reserved portion at the tube end of the steel tube is wound and shielded, in the process of spraying the corrosion-prevention outer coating, corrosion-prevention materials are sprayed on the shielding object instead of being combined on the reserved portion at the tube end of the steel tube, then, the shielding object is peeled off and the reserved portion at the tube end of the steel tube is exposed, so original properties of the tube end of the steel tube are reserved, and connection in construction sites is facilitated; in addition, by means of the method, mechanical equipment is not needed, the operating efficiency is high, the corrosion-prevention materials at the tube end of the steel tube can be removed completely, and zero energy consumption can be achieved.

Description

technical field [0001] The invention belongs to steel pipe anti-corrosion treatment technology, in particular to a steel pipe anti-corrosion outer coating pipe end reserved treatment method. Background technique [0002] Anti-corrosion steel pipe refers to steel pipes that have been processed by anti-corrosion technology, which can effectively prevent or slow down the corrosion phenomenon caused by chemical or electrochemical reactions during transportation and use. Such as 3PE anti-corrosion, 2PE anti-corrosion steel pipe, single PE anti-corrosion steel pipe, epoxy coal tar pitch anti-corrosion, fusion bonded epoxy powder anti-corrosion, etc. In the field of use (such as oil pipelines, steel pipe piles of bridges, etc.), it is often necessary to connect (such as welding) multiple anti-corrosion steel pipes. However, the anti-corrosion layer of the existing anti-corrosion steel pipes often completely covers the entire surface of the steel pipes. At the same time, it is nece...

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Problems solved by technology

[0003] The technical problem to be solved and the technical task proposed by the present invention are to overcome the defects of low efficiency, incomplete removal and high energy consumption of removing the anti-corrosion coating at the end of the steel pipe at the construction site, and provide a steel pipe anti-corrosion outer coating pipe end reserved processing method

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