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Technical Bulletins: FEA on a Transition Piece

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Technical >> Technical Bulletins > Finite Element Analysis - Transition Piece
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FEA: Case Studies

Product: Transition Piece
Technical Information: 3D Modeling Software, Parametric Technologies Modeler, Finite Element Analysis Software, COSMOS

Image of an FEA on a transition piece
 
Case Study Information

This item was modeled to the specifications included in drawing 6819001-159020. It uses a standard flange at the top as specified. It has been modified to include the extra length of pipe and to eliminate two flanges. The rectangular flange is fabricated of 1.25 x 5 inch stock and is made of A36 steel. The whole transition and pipe is fabricated of 3/8” thick A516 Grade 70 steel and this was expressed in the model. The model has a temperature condition of 105° C/221° F.

Two cases were modeled in which all references to pressure, PSI, refers to PSIG (PSI gage). The first was at operating condition when the transition piece experiences 18.7 PSI internal pressure. The second was at full vacuum when the transition piece experiences 15 PSI external pressure. The stress and displacement results are expressed in the following plots.

*Note: All references to pressure, PSI, refers to PSIG (PSI gage)

 
Illustration of Pressures and Displacements
Pressures and Displacements on the transition piece
 
Stress Plot #1
Transition Piece: Internal Pressure = 18.7 PSI
FEA showing the largest areas of stress.
This model has an internal pressure of 18.7 PSI on every internal surface. The chart on the left of the model shows the stresses at every point in the model by a color coding system.
 
Stress Plot #2
Transition Piece: Internal Pressure = 18.7 PSI
FEA showing the internal pressure on the transition piece
This model has an internal pressure of 18.7 PSI on every internal surface.
 
Displacement Plot #1
Transition Piece: Internal Pressure = 18.7 PSI
FEA showing the internal pressure at 18.7 PSI
This model has an internal pressure of 18.7 PSI on every internal surface. The chart shows the displacement at every point in the model by a color coding system which represents inches of displacement.
 
Illustration of Pressures and Displacements
Transition Piece: External Pressure = 15 PSI
Pressures and Displacements on the transition piece at 15 PSI
 
Stress Plot #1
Transition Piece: External Pressure = 15 PSI
FEA on the transition piece at 15 PSI.
This model has an external pressure of 15 PSI on every external surface. The chart above shows the stresses at every point in the model by a color coding system.
 
Stress Plot #2
Transition Piece: External Pressure = 15 PSI
FEA on the transition piece at 15 PSI
The chart above shows the stresses at every point in the model by a color coding system. This model has an external pressure of 15 PSI on every external surface.
 
Displacement Plot #1
Transition Piece: External Pressure = 15 PSI
FEA on the external pressure of the transition piece at 15 PSI
The chart above shows the displacement at every point in the model by a color coding system which represents inches of displacement.

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