Required thrust lengths overlapping

[BernieH]

I'm looking at the situation described in the attached, where valve A and valve B are both closed. Pressure beyond each valve is zero. Treating each end of the pipe as a dead-end, the required thrust restraint lengths overlap. However, all forces oppose each other. So if I restrain the entire length of pipe, all situations should be covered -
both Valve A and B closed,
Valve A only closed,
Valve B only Closed.
This is probably a stupid question, just want to confirm...
Thanks

 

[coloeng]

You are correct. If all pipe between valve A and B is restrained, you should be covered if Vavle A and B are closed, or if only one of the valves is closed.