Stress Intensification Factor

Ratio of the actual or effective longitudinal stress in a component or fitting under external load to the nominal stress in that component or fitting as determined based on a straight pipe run with the same MPRxx as the component fitting.

Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards

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