Advances in Pipe Line Coating Using Induction Heating

摘要

This article deals with the value adding to pre-manufactured pipe for use in the oil and gas industry achieved by adding a protective three layer epoxy polyethylene coating to provide a single service point of supply to the end user. The type of pipe used for oil and gas lines, where high pressure is required today, is to API standard and pipe may vary in diameters typically from 160mm to in excess of 1,000mm with varying wall thicknesses depending on end application and other factors. In a rapidly developing country like China, the requirement for oil and gas pipelines has been most positive with regular announcements of new lines running from just a short distance of <100km to >1,000km. Pipeline industries have developed in many countries what in some cases have been a secondary downstreamer opportunity for the tube and pipe manufacturer. This article will explore issues relating to the application of induction heating for pipe coating. The first such system utilising this technology was installed in Central China in 2003 and is meeting all expectations.