scope:

This NORSOK standard is applicable for preparation and optimisation of maintenance activities for plant systems and equipment including 

•  offshore topside systems, 
•  sub-sea production systems, 
•  oil and gas terminals.

The systems involving the following types of equipment: 

•  mechanical equipment: 

• tatic and rotating equipment; 
•  piping. 

•  instrumentation; 
•  electrical equipment.

Excluded from the scope of this NORSOK standard are 

•  load bearing structures, 
•  floating structures, 
•  risers and pipelines.

In principle, all types of failure modes and failure mechanisms are covered by this NORSOK standard.

This NORSOK standard covers 

•  definition of relevant nomenclature, 
•  brief description of main work flow related to maintenance and which elements this typically involves, 
•  definition of risk model and failure consequence classes, 
•  guidelines for consequence classification, including 
•  functional breakdown of plants and plant systems in MFs and sub functions, 
•  identification of MF and sub function redundancy, 
•  assessment of the consequences of loss of MFs and sub functions, 
•  assignment of equipment to sub functions and associated consequence classes. 
•  description of how to establish an initial maintenance programme, and how to update an existing programme, 
•  description on how to use the classification in combination with probability for decision making related to prioritising work orders and handling spare parts.