Definition(s)

Abnormal Value

Design value of a parameter of abnormal severity used in accidental limit state checks in which a structure is intended not to suffer complete loss of integrity.

  • NOTE: Abnormal events have probabilities of the order of 10−3 to 10−4 per year. In the limit state checks, some or all of the partial factors are set to 1.0.

Source: API RP 2MET, Derivation of Metocean Design and Operating Conditions, First Edition, November 2014. Global Standards

Abnormal Value

Design value of a parameter of abnormal severity used in accidental limit state checks in which a structure is intended not to suffer complete loss of integrity.

  • Note: 1 to entry: Abnormal events are typically accidental and environmental (including seismic) events having probabilities of exceedance of the order of 10−3 to 10−4 per annum.

Source: ISO 19900:2013, Petroleum and natural gas industries – General requirements for offshore structures. Global Standards

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