Finding most critical condition for 10" CS pipe with several design conditions

[Vrod76]

Hi, I have a Piping line list with various design conditions. Say, For carbon steel material 150#, 10"pipe, there are various pressure and temperatures. Should I calculate the pipe wall thk for each condition as per ASME B31.3. Or is there a shorter way? How to arrive at the most most critical service and generalise it to the entire selection? Pls have a look at the file attached for reference

 

[GD2]

OP,
You have couple of options to solve the field construction problem:
1. Start marking and colour the pipes (can be done through a contractor in your warehouse yard). Example: 150# White, 300# Yellow (least expensive).
2. Buy all pipes and fittings for 300# (if your Boss approves). I will be OK for 150# Class. Keep the flanges and valves for 150# class.
3. For other classes - use the marking option.

GDD
Canada