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Differences between SA350 LF2, LF2 Cl.1 and LF2 Cl.2?
2

Differences between SA350 LF2, LF2 Cl.1 and LF2 Cl.2?

Differences between SA350 LF2, LF2 Cl.1 and LF2 Cl.2?

(OP)
Somebody would like teel me the differences between SA350 LF2, LF2 Cl.1 and LF2 Cl.2? (Flange materials)

RE: Differences between SA350 LF2, LF2 Cl.1 and LF2 Cl.2?

There is no Class 1 or Class 2 for LF2.
LF2 is classified as a Group 1.1 material per B16.5 though.

RE: Differences between SA350 LF2, LF2 Cl.1 and LF2 Cl.2?

2
The difference between Class 1 and Class 2 in accordance with ASME SA 350 for LF2 is Charpy impact requirements

for LF2 Cl.1 - the minimum Charpy impact is 15 ft-lbs
@-50 deg F

for LF2 Cl.2 - the minimum Charpy impact is 20 ft-lbs
@0 deg F

RE: Differences between SA350 LF2, LF2 Cl.1 and LF2 Cl.2?

I guess this is what happens when you don't have the latest standards on hand! Sorry.

RE: Differences between SA350 LF2, LF2 Cl.1 and LF2 Cl.2?

As an additional follow up.

If any one is trying to register vessel design in Canada, using SA-350-LF2. You must state the class of this materail on your BOM's and drawings. Your design may be rejected due to failing to fully discribe the materail being used.

"I 'Quack' therefore I AM"

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