【作者】 盛水平；

【Author】 In this paper, a laminar defect in a head of a pressure vessel is studied. By calculating theoretical stress in the defect area and comparing it with testing result, maximal stress is gained (σ_(max)=130MPa). By CVDA-1984, fracture accessment and fatigue life estimation are carried out, the results show that the defect is allowable and the remain life of 12.5 years is obtained and by acoustic smission technique the defect is stable provided pressure less than 1.5MPa, and also allowable as pressure less than 1.75MPa. Therefore there is no damage to the tank caused by the laminar defect in the head.

【机构】 杭州市锅炉压力容器检验所；