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#42321 - 04/10/11 10:42 AM THERMAL BOWING DELTA TEMP.
Van Ha Offline
Member

Registered: 07/29/09
Posts: 195
Loc: Ho Chi Minh City, Vietnam
Dear all,

Does any one explain to me the following sentences in the CII technical reference for thermal bowing delta temp (page 3-110):
"This differential is used to compute an elemental load, added to each temperature case for “horizontal” pipes"

How can we understand from the FEM programming view point for this effect?

I hope my question clear.

Best Regards.

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#42322 - 04/10/11 04:19 PM Re: THERMAL BOWING DELTA TEMP. [Re: Van Ha]
Richard Ay Offline
Member

Registered: 12/13/99
Posts: 6226
Loc: Houston, Texas, USA
The thermal bowing effect can be distilled down to the computation of elemental end moments on the pipes. The magnitude of the temperature differential determines the magnitude of the end moments.
_________________________
Regards,
Richard Ay - Consultant

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#42353 - 04/12/11 09:05 AM Re: THERMAL BOWING DELTA TEMP. [Re: Richard Ay]
Sathishnive Offline
Member

Registered: 10/11/08
Posts: 10
Loc: India
Dear Richard,

In what case the thermal bowing occurs. can u just elaborate............
_________________________
SATHISH

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#42442 - 04/16/11 09:26 AM Re: THERMAL BOWING DELTA TEMP. [Re: Sathishnive]
Tengku_Syahdilan Offline
Member

Registered: 12/26/09
Posts: 56
Loc: Indonesia
Dear Satish,
Thermal Bowing occurs when your pipe experience different temperature between Top of pipe and bottom of pipe, the example of this is is rundown line og LNG TAnk piping system, or heaters pipes in the radiant section of a furnace source. The philosophy is that when there is uneven temperature distrubution then you must be aware of thermal bowing case as the thermal stress might lead to fatigue failure of the affected area.
_________________________
Tengku_Syahdilan
"From Failure we Learn"

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#42458 - 04/17/11 11:43 AM Re: THERMAL BOWING DELTA TEMP. [Re: Tengku_Syahdilan]
Sathishnive Offline
Member

Registered: 10/11/08
Posts: 10
Loc: India
Thanks Tengku
_________________________
SATHISH

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