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ASME B31.3 2004 Interpretation 19-40

ASME B31.3 2004 Interpretation 19-40

The interpretation 19-40 (see attached link) says that the design temperature need not be used for computing the displacement strains.

Consider the following cases

Case 1 - A piping system requiring a steam with the Steam out temperature of 200 deg C and a design temperature of 85 deg C from solar heating that a black body is likely to have.

Case 2 - A ambient temperature piping of 50 deg C without any requirement for steam out and a design temperature of 85 deg C from solar heating.

According to the interpretation, does case 2 not require to use the design temperature for computing the displacement strains?

RE: ASME B31.3 2004 Interpretation 19-40

My interpretation of the ASME Interpretation is to use the maximum anticipated operating temperature of that particular line for your design basis of that particular line.

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