Weld strength verification required?

Question

Weld strength verification required?

KVdA (Mechanical)

(OP)

5 Jan 19 06:51

Hi everybody,

Is it required to check the strength of the welds, per paragraph 5.7.2, for shell nozzles when they comply with the figures an tables of API650?

Thanks

JStephen (Mechanical) · Answer 1 · 2019-01-07 14:13:33

Generally, if you use the standard details from the tables, it is not necessary to check weld capacities.

KVdA (Mechanical) · Answer 2 · 2019-01-07 14:24:51

Not necessary as in "i don't suspect any problems" or in " it is not required by the API"?
Is it possible to refer to a paragraph in the code?

THX

JStephen (Mechanical) · Answer 3 · 2019-01-07 15:26:30

Not necessary as in "having previously checked this, it is not the limiting factor for a standard nozzle".
Note that API-650 does allow variations in repad size, shape, thickness, etc., and I expect you'd be most likely to run into weld issues either using repads thicker than the shell or outer fillet welds smaller than the repad thickness.
If in doubt, do the check for the tank in question. It lends itself to a spreadsheet design.

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Weld strength verification required?