Original test was 7.5bar which is the concern when rerating to B31.3, original weld quality is the other concern so the suggestion is to use the thermal relief case of 19 bar as a test pressure and justification for a waiver.
Hi, I am looking at a pipe (Contents are fuel oil) with a design pressure of 5 bar, the pipe also has a thermal relief valve set at 19 bar. I need to re-rate the pipe, can I use the fact that the thermal relief valve has lifted in lieu of a hydrotest ?, if the thermal relief has lifted is the...
