Dear Sirs,

Accordig to CAESAR2 User manual 139page, ther is explation about Cold Load Spring Hanger Design.
So, we can choice the option as check box, in the classic piping input dialogbox.

What does it mean?
- Dose it affect to change of size?
- The OupLoad is Cold Load?? So, Should we inform that with specifying Information to support manufacturer?
- Dose it cause any changes in size or Installation method?

I'm sure I have seen simillar question in the forum, but I couldn't find exact one. Here, please take a look at the link.

http://65.57.255.42/ubbthreads/ubbthread...=true#Post55896

The concept of cold load setting is explained well in the Peng's 'pipe stress engineering'.

-Sometimes, yes

-Yes, I would inform support vendor.
It is matter of what value you use for setting a spring. If you set cold load, spring will be set base on the cold(sustain) load, and it support pipe using it. So when plant stopped or just installed, pipe line is aligned. But if you set hot load, which is default in CAESAR II. Spring will be set base on operating load and at the operating case, and pipe will be aligned at operating condition.
-As long as it does not change the size or type of support, no. It's just you set a base point at the cold position, and as plant operates spring will move.

You can compare the difference using CAESAR II model.