EN 13445-5 and PED limitation of test pressure

[jbesson]

Hey everybody,

Considering a pressure vessel designed with EN13445 and PED, wit ref to § 10.2.3.3.1 of EN13445 that for says test pressure:

max 1.25 Ps fa/ft or 1.43 Ps under condition that test pressure was limited such a way not to increase design stress.

I understand that if test pressure is the governing condition we're allowed to reduce the test pressure to the maxi allowable pressure of the equipment in test conditions (I.E. ambiant temperature and 90% of yeld stress) with the thickness resulting of calculation for design.

If PED is applicable the test pressure is defined by greater of 1.25 Ps fa/ft or 1.43 Ps and PED doesn't offer possibility to reduce test pressure.

Does anybody have some recommendations or comments ?

 

[jbesson]

Hey Fawkes,

Can you clarify witch § of PED you are making reference to ?

 

[jbesson]

Fawkes,

I've found the sentence, thanks.

In my opinion it's not really sufficient to come to the conclusion that PED allows to reduce the test pressure to the maxi allowable pressure of the equipment in test conditions.

Have you experience of that ?