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

[Ding123]

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

 

[codeeng]

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

 

[metengr]

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

 

[codeeng]

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

 

[Larry617]

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.


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