Importance Factor - TANK - Help - Hexagon PPM

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Specifies the API importance factor for seismic analysis. Usually, this value is 1.0, unless specified otherwise by the purchaser. API recommends that this value not exceed 1.5.

Table E.5 - Importance Factor (I) and Seismic Use Group Classification

Seismic Use Group

I

I

1.0

II

1.25

III

1.5