UA-69298255-1 UA-69298255-2 Blog Little P.Eng. for Engineers Training & Engineering Services

June 4, 2020

Often expansion stress problems are due to the use of fittings with large stress intensification factors (SIF). In these cases, it may be possible to upgrade fittings to those with lower SIF values. For example, miters can be upgraded to bends, which can be further upg...

June 4, 2020

The concept that addition of expansion loops reduces the expansion stress range in a system is recognized by the B31.3 code (and others). This is codified in the requirement that expansion analysis need not be explicitly done for a system meeting the following conditio...

May 17, 2020

Sustained Stress

B31.3 does not provide an explicit equation for sustained stress calculations, but only requires that the engineer compute the longitudinal stresses in the pipe due to weight and pressure, and then ensure that these do not exceed Sh- This is most common...

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