Based on the condition of equipment of the Manwan Hydropower Plant,the causes,characteristics and harm of equipment defects are analyzed.

Based on this,the equipment defect data mining system based on J2EE is developed,which can make good use of the current and history defect data of the equipments.

In recent years,high consumption of boiler oil supply,which is caused by power-generating coal quality decline, equipment defect and operation,occurs in four 330 MW units in Shaanxi Huadian Pucheng Power Generation Corp.

In view of the problems occurred in the HP system during the startup of urea plant, analyzes that the reasons are the design defects resulting in lower stripping efficiency of stripper.

Primary construction stage,such connatural defects as structure integrity,dam concrete strength and foundation sliding stability caused by survey & design defects and construction management limition,reduce relibility of huge dam which is unmeet to the social economy requirement of our country.

Nevertheless, 402A, created to deal with liability for manufacturing defects, could not appropriately be applied to cases of design defects or defects based on inadequate instructions or warnings.

Analysis on design defect of hydraulic-operated breakers of GIS and treatment measures

Analyzes the design defects of ammonia condenser in SNAM ammonia stripping process urea plant and provides the improvement methods.

The unexpected resetting of MAX 1000 DCS output participation module was analyzed and design deficiency was found in application of Forceback function.