Thanks for that I agree the pressure test should have been done before the weep hole was put in to strength test the pipe.
The Guideline 1/42 is from the Pressure Equipment Directive Guideline Number 1/42.
Link:
https://ec.europa.eu/growth/sectors/pressure-gas/pressure-equipment/guidelines_en...
I am currently designing to ASME B31.3 and have been asked about pressure testing Relief Valve Discharge Pipes.
ASME states that Vents and drains need not be pressure tested post the last valve but as they are covered under the PED and classed as being in the scope of PED if the discharge...