Part Factor

Definition(s)


Part Factor , f3,est

Derating factor that de-rates a component, taking account of non-pressure-related axial loads, e.g. bending and externally-applied direct-acting axial forces so that the combined hoop and axial stresses are still within the design envelope for each individual load case.

  • Note: 1 to entry: f3,est is estimated at the bid stage. The f3,est part factor cannot be confirmed until a stress analysis is conducted. The f3,est part factor can vary from one load case to another.

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

Part Factor , f2

Derating factor related to confidence in the pipework system, the nature of the application and the consequences of failure.

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