Impact Test For SA-179
Impact Test For SA-179
(OP)
Dear all ,
I would like to know were i can find specification for impact test of SA-179 used as tubes for heat exchangers,
I couldn't find any statement regarding impact test in Section2 A SA-179 as well as in SA-450 were as in PV elite it shows that it can be used with impact test up to -55°F ,
I have placed a material requisition requiring impact test report at -55°F based on report shown by pv-elite.
I would like to know were i can find specification for impact test of SA-179 used as tubes for heat exchangers,
I couldn't find any statement regarding impact test in Section2 A SA-179 as well as in SA-450 were as in PV elite it shows that it can be used with impact test up to -55°F ,
I have placed a material requisition requiring impact test report at -55°F based on report shown by pv-elite.





RE: Impact Test For SA-179
RE: Impact Test For SA-179
I think I know a few things, but this time I have to throw up my arms;- where is actually the clause you cited because the SA-450 is listing the optional Impact Test on SA-179 without any qualification. I am also willing to learn!
Cheers,
your humble gr2vessels
RE: Impact Test For SA-179
RE: Impact Test For SA-179
i clearly understood the first part which says less than 2.5mm can be used up to -55°F without impact test,
But the i didn't understand very much clearly about,
For vessels or components made from NPS 4 (DN 100) or smaller tubes
or pipe of P‐No. 1 materials, the following exemptions
from impact testing are also permitted as a function of
the material specified minimum yield strength (SMYS)
for metal temperatures of −155°F (−105°C) and warmer:
SMYS, ksi ( MPa) Thickness, in. ( mm)
20 to 35 (140 to 240) 0.237 (6.0)
36 to 45 (250 to 310) 0.125 (3.2)
46 (320) and higher 0.10 (2.5)
RE: Impact Test For SA-179
which client demands for calculation review.
RE: Impact Test For SA-179
RE: Impact Test For SA-179
and in the calculation report also its not mentioning that it is not using ucs-66(d), all it mentions is tht it doesn't use ucs66(g)&(i),
but now the confusion is statement that is showing in ucs-66(d)
i.e
For vessels or components made from NPS 4 (DN 100) or smaller tubes
or pipe of P‐No. 1 materials, the following exemptions
from impact testing are also permitted as a function of
the material specified minimum yield strength (SMYS)
for metal temperatures of −155°F (−105°C) and warmer:
as mentioned above vessel or vessel components can be exempted if within the range mentioned in the table for ucs-66(d)
but when i am trying to design a vessel keeping all the values within the range as mentioned in ucs-66(d) it is showing MDMT failure,
Now my concern is does ucs-66(d) covers vessel or only the vessel components in it.
Thank you very much for the idea,
Regards,
Stephen Wilson
RE: Impact Test For SA-179
You have to look in the product spec to know if the test is required or not.
And yes, all of these exemptions are difficult to keep track of.
= = = = = = = = = = = = = = = = = = = =
Plymouth Tube
RE: Impact Test For SA-179
Study the Code first, your software second.
Regards,
Mike
RE: Impact Test For SA-179
and as u said code is first ,
but as per current trend client first ask the calculation report from pv elite,
so after studying the code and comparing it to software analysis i have found some deviations which i just wanted to confirm before making a comment about the report, so just discussed here.
Thank you very much for your comment,
Regards.
RE: Impact Test For SA-179
Regards,
Mike