A manufacturing process for plastic-coated steel pipes

Abstract

The invention relates to a plastic-coated steel pipe producing and manufacturing technology which adopts the following outer surface plastic-coated processing equipment. The outer surface plastic-coated processing equipment comprises a supporting and clamping device, side plastic-coated devices and rear polishing devices, wherein processing grooves are uniformly formed in the supporting and clamping device; the side plastic-coated devices are uniformly arranged on the left and right sides of the interior of each of the processing grooves; and the rear polishing devices are symmetrically arranged on the front and rear sides of the interior of each of the processing grooves. With adoption of the plastic-coated steel pipe producing and manufacturing technology, the problems that during the outer plastic-coated machining process of the existing equipment, the surface of a to-be-processed steel pipe is provided with a rough part, the steel pipe has a defect due to lacking of polishing during the following plastic-coated process, the quality of the produced plastic-coated steel pipe is lowered, and when the existing equipment carries out outer plastic-coated machining process, after plastic-spraying of the outer surface, one-time painting technology is adopted, as a result, painting is not uniform to generate concave-convex parts and affect following quality of the plastic-coated steel pipe can be solved.

Description

technical field [0001] The invention relates to the field of processing plastic-coated steel pipes, in particular to a manufacturing process for plastic-coated steel pipes. Background technique [0002] Plastic-coated steel pipes, also known as plastic-coated pipes, steel-plastic composite pipes, and plastic-coated composite steel pipes, use steel pipes as the substrate, and weld a layer of plastic anti-corrosion layer or Steel-plastic composite steel pipe with plastic anti-corrosion layer welded on the inner and outer surfaces. Plastic-coated steel pipe has excellent corrosion resistance and relatively small frictional resistance. Epoxy resin coated steel pipe is suitable for the transportation of water supply and drainage, sea water, warm water, oil, gas and other media, and PVC coated steel pipe is suitable for the transportation of drainage, sea water, oil, gas and other media. [0003] At present, the existing plastic-coated steel pipes usually have the following defe...

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Problems solved by technology

[0005] The present invention can solve the problem that existing equipment has rough parts on the surface of the steel pipe to be processed during the external plastic coating process. Due to the lack of grinding, the steel pipe has defects in the subsequent plastic coating process, which reduces the quality of the produced plastic coated steel pipe. In the process of external plastic coating, some equipment adopts a one-time brushing process after spraying plastic on the external surface, which makes the coating uneven and uneven, which affects the quality of subsequent plastic-coated steel pipes and other problems.

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