European Code- P275NL1 above 100 ¦C.
European Code- P275NL1 above 100 ¦C.
(OP)
Dear All,
we have to design a vessel where P275 NL1 have been chosen for the shell/head plates.
Design temperatures are -35°C / +130 °C.
How is possible to obtain the " MINIMUM VALUES FOR THE PROOF STRENGHT RP0,2 AT ELEVATED TEMPERATURES" ?
The reference standard EN 10028 has no info about this important values.
PV elite calculates the derating of the material making reference to this standard but no info are available.
Have you ever faced this matter?
thanks all
we have to design a vessel where P275 NL1 have been chosen for the shell/head plates.
Design temperatures are -35°C / +130 °C.
How is possible to obtain the " MINIMUM VALUES FOR THE PROOF STRENGHT RP0,2 AT ELEVATED TEMPERATURES" ?
The reference standard EN 10028 has no info about this important values.
PV elite calculates the derating of the material making reference to this standard but no info are available.
Have you ever faced this matter?
thanks all





RE: European Code- P275NL1 above 100 ¦C.
RE: European Code- P275NL1 above 100 ¦C.
RE: European Code- P275NL1 above 100 ¦C.
Thanks Ulyssess for your reply.your suggestion is something that can fit for my problem.
Anyway,there are no constraints to use Nl1 material for these temperatures,aren't they?
RE: European Code- P275NL1 above 100 ¦C.
Thank you that you still have faith in me .
just look at this pdf, maybe you have something on this file.
RE: European Code- P275NL1 above 100 ¦C.
could you please tell me the standard where you took this Page?
Thank you in advance!
RE: European Code- P275NL1 above 100 ¦C.
this pdf come from EN 10216-3:2002
RE: European Code- P275NL1 above 100 ¦C.
this is for pressure pipe...on the pressure plate...nothing...but anyway I think the behaviour with T depends on material category..thank you!
RE: European Code- P275NL1 above 100 ¦C.
You cannot use values from another product form standard, unless this explicitly allowed, e.g. when using fittings like those from ASTM A403 which may be made from pipe acc. ASTM A312.
RE: European Code- P275NL1 above 100 ¦C.
P275 NL1 is found in ISO / TR 20172:2009 ( E ) group 1.1 in three standard , if you want to find an answer for this kind of material you need to look in EN 10216-3 , EN 10217-3 , EN 10028-3.
RE: European Code- P275NL1 above 100 ¦C.
I would suggest to use a different grade. However, I am at home now, and can not look into the standard right now. Otherwise I could advise.
RE: European Code- P275NL1 above 100 ¦C.
As Osiris, I dont have the standaards with me right now, so cant check for the correct answer.
RE: European Code- P275NL1 above 100 ¦C.
XL83Nl is right.I must use the standard for pressure plate.
so EN 10028-3.
The problem,and the reason why I posted my question is that in this standard there is nothing about how this grade Nl1 works above 100°C.
i don't know where I can take this values
RE: European Code- P275NL1 above 100 ¦C.
if you want to maintain those values -35 ° C / +130 ° C.
then you will have to use a different material
RE: European Code- P275NL1 above 100 ¦C.
RE: European Code- P275NL1 above 100 ¦C.
I would like to inform you all that at the end the material used was the P275NL1 and the properties at high temperature taken from EN 13445-2 par 4.2.2.2,table 4.2-1 where factor for derating are listed.
As per par. it's not a good practice to use this low temperature materials at high temperature for long time because this would change the structure of the steel.
In this case the high temperature is not the operative temperature (below 100°C)!
Thank you all for interesting answers!!
RE: European Code- P275NL1 above 100 ¦C.
That is correct. But up to 300 ºC you do not really have to worry about grain growth. Above this temperature you should consult a specialist.
Now what is the design temperature that will be stamped into the name plate? I am just curious.