人孔盖堆焊密封面裂纹成因分析及预防

Cause Analysis and Preventive Measures of Overlaying Crack in Manhole Cover Sealing Surface

对煤气化装置飞灰排放过滤器人孔盖堆焊密封面出现应力腐蚀的原因进行了分析,提出了避免发生应力腐蚀的预防措施。

based on the overlaying crack in sealing surface of fly ash filter manhole cover in coal gasi- fication plant of our company, the analysis suggests that the main cause of crack is the stress corrosion in manhole cover sealing surface. The paper analyzes in detail the subjective and objective reasons why there exists three stress corrosion essential factors in filter working environment, and presents the corresponding preventive measures and suggestions to avoid stress corrosion.