UG-37 strength reduction factors

rj13103 · **Joined:** Mon Oct 12, 2009 1:00 pm **Posts:** 10

Dear All
Both fr1 and fr2 strength reduction factor values in UG-37 are Sn/Sv.

My question:
Is there any difference between two values?

Thanks
Ramin

Shrinath Desai · **Posted:** Sat Jan 07, 2012 6:47 am

Value of fr2 is Sn/Sv.

Value of fr1 depends upon how the nozzle is attached to the vessel.
see definition of fr1 in both cases.

Code:

fr1 = Sn /Sv for nozzle wall inserted through the vessel wall
fr1 = 1.0 for nozzle wall abutting the vessel wall and for nozzles shown in Fig. UG-40, sketch (j), (k), (n) and (o).

The difference in their use is that fr1 is used for non-reinforced opening only.
while fr2 is used in both.

Gonzaga · **Joined:** Sat Dec 15, 2001 1:00 am **Posts:** 657

Shrinath Desai wrote:

Value of fr2 is Sn/Sv.

Value of fr1 depends upon how the nozzle is attached to the vessel.
see definition of fr1 in both cases.

Code:

fr1 = Sn /Sv for nozzle wall inserted through the vessel wall
fr1 = 1.0 for nozzle wall abutting the vessel wall and for nozzles shown in Fig. UG-40, sketch (j), (k), (n) and (o).

The difference in their use is that fr1 is used for non-reinforced opening only.
while fr2 is used in both.

Do you think "Pugna usque ad veritate" (and the gunner :mrgreen:

) adds value to your messages?
Mauro

Shrinath Desai · **Posted:** Sun Jan 08, 2012 8:16 am

No

It is just to add some fun :lol:

and color in everyday

life as well as this :cry:

forum

rj13103 · **Joined:** Mon Oct 12, 2009 1:00 pm **Posts:** 10

Shrinath Desai wrote:

Value of fr2 is Sn/Sv.

Value of fr1 depends upon how the nozzle is attached to the vessel.
see definition of fr1 in both cases.

Code:

fr1 = Sn /Sv for nozzle wall inserted through the vessel wall
fr1 = 1.0 for nozzle wall abutting the vessel wall and for nozzles shown in Fig. UG-40, sketch (j), (k), (n) and (o).

The difference in their use is that fr1 is used for non-reinforced opening only.
while fr2 is used in both.

Dear Shrinath Desai, thank you for your kind response.
Ramin

UG-37 strength reduction factors

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