各路大侠您好，
PSPC 关于surface treatment after erection 的描述如下：
butts st3 or better or sa2.5 where practiable. small damages up to 2% of total area:st3 contiguous damages over 25m2 or over 2% the total areas of the tank.sa2.5 shall be applied.
您是如何理解的？破损面积算不算合拢缝的面积。一般船厂又是如何估算这个2%的？
谢谢
