Application of 3LPE

First step is the surface preparation of pipes prior to application of 3LPE. To do so first pipes are passed through gas furnace for preheating of pipes above dew point temperature thereafter pipes are subjected to steel grit blasting using centrifugal blasting technique where all the rust on pipes surface is removed,. In steel grit blasting, pipes are cleaned up to white metal surface appearance Sa2.5 with required surface profile. Using acid spraying technique, pipes are sprayed with phosphoric acid solution which reacts with chloride ions present on pipe surface and rinsing the pipes with RO water flash them out of the pipe surface. In the end of first step quality inspection is performed.

Second step is the coating application. Surface treated pipes are subjected to induction heating of pipes upto the epoxy manufacturer recommended temperature which 200-220ºC. Epoxy powder is sprayed on pipes through electrostatic spray gun technique after some seconds of epoxy layer application second layer of copolymer adhesive and third layer of polyethylene is applied on pipes through side extrusion process there after pipes are passed through Quenching tank where cold water is sprayed on as coated pipes where soft coated pipes are converted to hard coated form. In the end of second stage coated pipes are subject to full length holiday detection where flaw in coating is detected.

Third step involves removal of coating up to the specific length from both ends through cutback brush rollers thereafter in the final stage coated pipes are inspected for thickness measurement, coating bevel, cutback length, marking, and other quality control testing. 

 

We are a comprehensive high-tech enterprise integrating scientific research, development, manufacturing and sales. The company is committed to providing a full range of high-end material services to provide customers with quality services.

 

Our company has always been committed to providing 3LPE coatings anti-corrosion material for steel pipes, including powder epoxy primer, grafted adhesive, polyethylene topcoat etc. Adhering to the concept of “quality is life”, the company strictly controls the product quality. Excellent product quality and exquisite technical service have laid a solid foundation for the rapid development of the enterprise.