Mr. Klein:

I think you have already understand my dispute,and the reason of using the Sh in each case.

According to your last sentence in your post, and the doubt of if the seismic2 case can occur when the system is hot, surely, the answer is YES, but if it happens it wouldn't be the seismic case 2 but the 1, in other words,the hurricane can happen in whatever case,when the pipe is cold and also when it is hot.If the seism happens when the pipe is cold, then, there is no reason to use the Sh smaller,since it is taken into account that the seism can occur when the pipe is hot in a second state of load. It is in this moment when it should be correct the use of a Sh smaller.

Regards,