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CSEI Developed Boiler Special Inspection for Luoyang Branch of Sinopec Cooperation

Published:2014-08-08 14:28:59.0  Publisher:admin
   
In the past few days, with the commission of Luoyang branch of China Petroleum and Chemical Corporation, the Pressure Vessel Division of CSEI conducted the special inspection for its 3 boilers on the corrosion and thickness decrease of inner water wall tubes.

It’s said that these 3 boilers will provide steam and electricity for all kinds of devices of the whole factory when they are in operation. And the boilers could be alternately used according to production arrangement when programmed shutdown happened. While if unplanned shutdown happened, the electricity and steam cannot meet the production requirements which will cause huge loss even affect the stable operation of the whole facility. Before 2013, the main reason of boilers’unplanned shutdown of this factory is burst and leak of water wall tube.

In April 2013, the Pressure Vessel Division of CSEI organized some professional technical personnel to analyze the mechanism, location, inspection ways and effectiveness of the internal corrosion in detail, decide to conduct the inspection for 1# coal-powder boiler by using the combined technique consisting of rapid screening of guided waves, ultrasound precise retest and metal magnetic memory test. In the scene of inspection, the technical personnel found that there are several places of thickness decrease, and the wall thickness of the thinnest place is 2.5mm (the nominal thickness is 5mm) which make the thickness reduction reach 50%. These defects also were validated by pipe cutting. According to the repair suggestion of CSEI, the customer eliminated the potential safety hazard which will lead to pipe burst in time. Up to now, this boiler has been smoothly operated for 14 months and unplanned shutdown accident never happened again. 

Recently, the company has commissioned the Pressure Vessel Division of CSEI again to carry out the special inspection for more water tubes of boilers. During the inspection, our technical personnel proposed some defect eliminating advices to the customer, provided technical support for stable operation of boilers. (Information Source:Pressure Vessel Division, CSEI)


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