I actually agree with your observation. In my case, we have a repair to be carried out on the piping with the installation of a part that must enclose a screwed clamp. We had external corrosion in the pipe caused by bird droppings that caused leakage into the atmosphere (believe me, it's true)...
I think this is not the issue. We are not necessarily talking about cryogenic systems. In cryogenic systems, the valves must be equipped with an extended bonnet and positioned in such a way as to allow their operation. My case is a flare line, which is not cryogenic.
In ASME B31.3 revision 2018, for the minimum impact test exemption temperature reduction, the code establishes 3 conditions for the use of applicable requirements:
(1) The piping is not in Elevated Temperature Fluid Service.
(2) Local stresses caused by shock loading, thermal bowing, and...
The set pressure tolerance for pressure relief valves shall not exceed ±2 psi (15 kPa) for pressures up to and including 70 psi (500 kPa) and ±3% for pressures above 70 psi (500 kPa), Ref. ASME Sec. VIII, Div. 1-2019, Para. UG-134(d)(1).
My question is: Should this tolerance be understood to...
