Building Static Load Cases - CAESAR II - Help

CAESAR II Users Guide

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CAESAR II
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CAESAR II Version
12

The CAESAR II load case editor combines native and combination loads as needed by the various piping codes that CAESAR II supports.

This section describes which load cases to use in a variety of situations. If you need assistance in load case definition for a situation not covered here, or if you need further clarification of the load cases described, please contact ICAS Technical Support by e-mail at caesarii@intergraph.com.

Standard load cases for B31.1, B31.3,B31.3 Chapter IX, ASME SECT III Class 2 & 3, NAVY 505, B31.4, B31.4 Chapter XI, B31.5, B31.8, B31.9, Canadian Z662, RCC-M C & D, Stoomwezen, CODETI, Norwegian, FDBR, BS 806 piping codes are as follows:

Standard load cases for situations where you have weight, temperature, and pressure:

L1

W+T1+P1

(OPE)

L2

W+P1

(SUS)

L3

L1-L2

(EXP)*

* Use the algebraic combination method on the Load Cases tab for the expansion case.

Some of the piping codes perform a code stress check on the operating case and some do not. For more information, see the CAESAR II Quick Reference Guide for the equations used by the various piping codes to obtain code stress and allowable stress.

The expansion case is a combination case that results from subtracting the sustained case from the operating case. The expansion case represents the change in the piping system because of the effect of temperature in the presence of other loads. This is important because the restraint status of the operating and sustained cases can be different if there are nonlinear restraints (such as +Y, -Z, any restraint with a gap, and so on) or boundary conditions (such as friction).

Standard load cases for B31.4 Ch IX, B31.8 Ch VIII, and DNV codes:

L1

W+T1+P1

(OPE)

L2

W+P1

(SUS)

No expansion stress is calculated for these piping codes.

Standard load cases for BS7159 and UKOOA piping codes:

L1

W+T1+P1

(OPE)

No expansion or sustained stress is calculated for these piping codes.