PED- Allowable pressure dropp (pressure loss)
PED- Allowable pressure dropp (pressure loss)
(OP)
Hallo to everyone!
I would like to hear an expert opinion about permissible pressure loss according to PED 97/23?
We tested a vessel (V=20L) with O-ring at a pressure of P1= 5 bar and after 2 hours the pressure drop was 2 bar (P2=3bar). I just can´t find a reference in Pressure equipment directive to determine if this pressure loss is permissible or not. Or is generally any pressure drop allowed.
I would like to hear an expert opinion about permissible pressure loss according to PED 97/23?
We tested a vessel (V=20L) with O-ring at a pressure of P1= 5 bar and after 2 hours the pressure drop was 2 bar (P2=3bar). I just can´t find a reference in Pressure equipment directive to determine if this pressure loss is permissible or not. Or is generally any pressure drop allowed.





RE: PED- Allowable pressure dropp (pressure loss)
What is the design code of the vessel?
RE: PED- Allowable pressure dropp (pressure loss)
Dejan IVANOVIC
Process Engineer, MSChE
RE: PED- Allowable pressure dropp (pressure loss)
XL83NL- The design code is German PV Code: AD2000
EmmanuelTop- "During the proof test no leaks are permitted from the pressure envelope". - I was hoping to find something similar in AD2000 but i didn´t have any luck. :)
RE: PED- Allowable pressure dropp (pressure loss)
Did you gather ALL of the possible fluid leak paths to see if a valve or seal brke?
Did you record original, at intial test, at final test, and at empty ambient temperatures?
Was the PV actually at the ambient temperature you measured? (No sunlight or power sources, or heater turning on or off?)
RE: PED- Allowable pressure dropp (pressure loss)
Thank you for usefull tips!
We didn´t fill the vessel with water, we just made a pressure test with air.
I think that our problem is the O-ring. The O-ring we use now is encapsulated FEP O- ring which is very hard and thus can not be commpressed enough because our lid is screwed just with 4 fast opening bolts (tightened with hand).