Dear Mr.Rahul,
27 J energy value is not an unachievable value.
Refer to ASME Sec VIII Div.2 - 2007 edition which is totally modified. 27 J energy value is the minimum for lower strength materials where as higher values are indicated for other materials.
It is possible for CS at -20 deg C .Normal CS pipes shall be able to be fit up to -29 deg C .
tagore
27 J energy value is not an unachievable value.
Refer to ASME Sec VIII Div.2 - 2007 edition which is totally modified. 27 J energy value is the minimum for lower strength materials where as higher values are indicated for other materials.
It is possible for CS at -20 deg C .Normal CS pipes shall be able to be fit up to -29 deg C .
tagore
On Tue, Aug 12, 2008 at 7:32 AM, Rahul P <rahulpisat@googlemail.com> wrote:
Hello All,
Can anyone explain me about the Impact test requirement of material as
per Stoomwezen rules ?
from ASME 31.3 we can find the Impact test requirement for CS, as per
thickness and minimum design temperature.
But in Stoomwezen rules there is a minimum requirement of rupture
energy of 27 J.
I have to design a pipe class with -20 deg C as minimum temperature
for 145 bar pressure and size of 30 inch & carrosion allowance of 6 mm
With these design condition I expect to have very high thickness for
pipe.
is it possible to have cofirm 27 J requirement for such high thickness
of CS ?
Or it is advisable to change to LTCS material ?
thank you,
RahuL P
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