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What does CAESAR II do?

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Session overview

Taking the task from piping design to piping engineering.

What questions does CAESAR II answer?

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Should conclude within the hour.

Please use the Webinar dialog box to post your questions.

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Piping designer responsibilities

Designer locates equipment and then routes pipe between these positions using anestablished pipe specification

The piping system is a unique pressure containment.

Givens:

Pipe size is based on pressure drop, flow rate

Pipe specification (e.g. wall thickness) is based on design pressure & temperature

Material based on service requirements

Designer has established rules for basic layout

Hydraulic issues

Spans between supports (deadweight sag) System stability

Access / clearance

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So whats left for the piping engineer?

Many systems require analysis to evaluate strain

Sources of thermal growth

Pipe

Equipment connections (vessels and equipment)

Other sources of strain Support settlement

Support movement in marine piping

Strain Load Stress

Evaluate pipe load as stress due to this strain

Evaluate load on equipment directly

Except for simple layouts, the system response due to this strain is difficult to estimate

Analysis yields a better estimate of pipe deflection, loads on pipe supports and equipmentconnections, and stress in the piping; and not only for strain.

100 feet @ 170F

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Four typical interests in pipe stress analysis

Selecting and sizing supports

Checking pipe deflection under load

Evaluating pipe stress

And not only for those strain-based loads

Deadweight

Pressure

Wind & wave

Earthquake

y rau c rans en s

Vibration

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Creating a CAESAR II Model

(the analog) Start with a stress isometric or similar concept

Mark up the drawing for analysis

Create the i in in ut model a di ital re resentation of that analo

90110

80

100

10

120

20

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Analog to digital

Analog Digital representation

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CAESAR II Results

1. Hanger selection, restraint load

2. Pipe sag, horizontal deflection

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4. Stress check

A few examples will illustrate

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2. Check Deflection

ow muc oes s e ow

move when the systemheats up?

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3. Evaluate Equipment Load

Is this compressoroverloaded?

Compressor

ThermalGrowth

Anchor

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4. Evaluate Pipe Stress

This stub in connection isoverstressed and will failby fatigue over time.

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Analyze and review TURBO

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Document Results

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Conclusion

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