Analysis on burst of high temperature reheating pipe;

Tubing leakage occurred of a re-heater at Fushun power plant,the relevant case analysis results showed that the leakage was induced by corrosion of the solved oxygen in the water under scale on the tube surface,which then resulted in thinning of the tubing wall and finally in perforation of the tubes.

Surface defects have observed on outside surface of four hot reheat steam pipe bends,on the basis of the performed inspections and analysis,conclusion have been made as follows :the defects observed on outside surface of the four pipe bends are laps which can be attributed to improper heating the ingots and improper rolling parameters.

The analysis and test of the corrosion characteristics, corrosion product, pipe corrosion forms, surface composition and impurities, media and environment impact of the coils concludes that the corrosion of the heating coils of the 3 - phase separator is mainly the external wall corrosion by carbon dioxide and oxygen in the waster water.

This method,utilizing the difference of oil and water in physical property,is used to examine the leakage of return water and the oil floating on the water surface though transparent glass tube and separating concave slot installed in original heating coil return water pipe system.

The heat-transfer between the wall of the heating coil and the crude oil is the bottleneck which restricts the heat-transfer efficiency of the heating coil.