2013 Volume 62 Issue 3 Pages 86-92
In Japan, main unit of oil refineries have been operating for 20 years or more. Many places of business receive authorization of the self-imposed maintenance engineering organization for extension of the open inspection of plant for production. However, accidents due to corrosion etc. have still been occurring frequently. In the Japanese chemical equipment field, safety evaluation method is not fixed yet. At present, the four law of Safety Act is applied to the defected equipment. The method requires that the defects are to be removed and to be recovered to the minimum thickness by repair welding etc. In this paper, the accident occurrence situation of chemical equipment and tanks are shown, and describes relation between the deposit repair welding and four law of Safety Act.
