Thanks for all the answers, my question specifically if there are any standard or document to know and serve me back when I decide to repair / discard a valve.
Of course the desicion repair / discard the valve was taken considering the economic, logistical and engineering factor.
We are...
Greetings .-
I am researching valves used in natural gas distribution networks and would like to know what are the criteria for a valve is discarded and no longer be repaired, there is some Standard or document about it.
Thank you
