Mous1747
Mechanical
- Apr 11, 2013
- 91
My plant cycled 29 times in the last 18 months, you can imagine how much problems this is creating from downtime and lost production to equipment failure....etc.
One of the problems we are facing is flange connections are getting impacted by all these temperature transitions, thermally affecting the bolted joints causing it to leak.
we are trying to establish an inspection criteria to leak detect flange connections using fluke ultrasonic but most importantly we also wanting to establish criteria for hot-torqueing or turn-of nut while online or between cycles to avoid leaks all together.
What is the frequency to go back an tighten the nuts while online? what would be the optimal duration ?
if waiting for another plant trip , is it going to be every two trips ? or 3 or more?
I appreciate all your inputs.
One of the problems we are facing is flange connections are getting impacted by all these temperature transitions, thermally affecting the bolted joints causing it to leak.
we are trying to establish an inspection criteria to leak detect flange connections using fluke ultrasonic but most importantly we also wanting to establish criteria for hot-torqueing or turn-of nut while online or between cycles to avoid leaks all together.
What is the frequency to go back an tighten the nuts while online? what would be the optimal duration ?
if waiting for another plant trip , is it going to be every two trips ? or 3 or more?
I appreciate all your inputs.