金属油罐加强圈的合理确定

金属油罐加强圈的合理确定，对防止油罐罐壁失稳，保证油罐安全生产具有重要作用。分析了目前油罐加强圈的设置现状，针对目前我国油罐罐壁加强圈设计中普遍存在的不足，结合油库油罐使用过程中发生罐壁失稳事故实例，指出设计同罐罐壁加强圈时必须扣除腐蚀裕量值，这样才能保证当腐蚀裕量耗尽时，油罐仍具备足够的罐壁稳定性，同时对加强圈的位置及数量提出了设置意见，考虑到油罐强度要求，扣除值应以罐壁各圈板中腐蚀裕量为最小的

Reasonable Defination of Metal Tank's Reinforcing Rings.

Reasonably defining reinforcing rings for metal tanks is important in avoiding less stability of tank shells so as to guarantee safe operation. Analysis is done in the paper of the allocation of reinforcing rings at present. Based on the inadquacy existing in reinforcing ring design, and accidents caused by tank shell disstability which have ever occured, the writer thinks it necessary to deduct the corrosion margin value during the disign of tank shell's reinforcing rings so that the tank shells can be kept stable enough when the corrosion margin is used up. Also suggested in the paper are the allocation location and number of reinforcing rings. According to the strength requirement of a certain tank, the reinforcing ring design basis should be the deducted value which is the minimum corrosion margin in each reinforcing ring plate. Corrosion margin is related to the factors of service life of a tank, corrosion rate etc, the range of corrosion margin should be enlarged so as to maitain tank shell stability during the operation and maintenence. Corrosion margin is suggested to be no less than 1. 5mm as the minimum.