ASME B16.5 Bolts and Nuts - Impact Test
ASME B16.5 Bolts and Nuts - Impact Test
(OP)
Hi,
I'm a bit confused about the bolting material acc. to ASME B16.5. I generally use high strength bolting because it can be used in any flange connection.
I use A193 B7 bolts and A194 2H nuts for high and low temperatures. Can anyone say at which temperature an impact test is required? Is it advisable to use A320 L7 instead of A193 B7 at low temperatures? And which material should be chosen if you have low and high temperatures?
Thanks in advance!
I'm a bit confused about the bolting material acc. to ASME B16.5. I generally use high strength bolting because it can be used in any flange connection.
I use A193 B7 bolts and A194 2H nuts for high and low temperatures. Can anyone say at which temperature an impact test is required? Is it advisable to use A320 L7 instead of A193 B7 at low temperatures? And which material should be chosen if you have low and high temperatures?
Thanks in advance!





RE: ASME B16.5 Bolts and Nuts - Impact Test
RE: ASME B16.5 Bolts and Nuts - Impact Test
There is a strange mismatch in the codes where you can have a vessel at -40F OK with A193 B7 bolting (if it had bolts) but to attach a B31.1 pipe to it, you would have to use A320. Go figure.
The material seems to degrade in the presence of piping. (see tongue in cheek.) I wish the code committees would synchronize their stuff and all sing from the same song sheet. After all, the title of the song book is ASME.
Gee.... I spent most of my day today reading through those 3 codes trying to find some wiggle room somewhere to live like a BPV person in a B31.1 world and get rid of the need to use A320 bolting below -20F.
rmw
RE: ASME B16.5 Bolts and Nuts - Impact Test
SA.A-194 Gr. 7 give much more predictable results.