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Apr 10, 20201 min read

1.5.3 B31.1 Power Piping

The B31.1 code requires that the engineer calculate sustained, expansion, and occasional stresses, exactly as defined below: Read More:...

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Apr 9, 20202 min read

1.5.2 Code Stress Equations

The piping code stress equations are a direct outgrowth of the theoretical and investigative work discussed above, with specific...

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Apr 7, 20204 min read

1.5.1 Primary vs. Secondary Loads

Markl's investigation of the fatigue problem, following the earlier recognition of the maximum stress theory of failure, led to...

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Apr 3, 20203 min read

1.4 Welding Research Council Bulletin 330

The Welding Research Council's Bulletin 330, "Accuracy of Code Stress Intensification Factors for Branch Connections" documented a major...

Mar 29, 20203 min read

1.3 Stress Intensification Factors

As noted previously, Markl's fatigue tests generated endurance curves for various fitting configurations, such as straight pipe, butt...

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