RA

Definition(s)


Ra

Surface finish

Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global Standards

 

Ra

Measurement of the average roughness of a surface.

Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global Standards

RA

Component of a JSA, where a determination of the expected level (severity) of illness, injury, and/or property damage that an identified hazard can cause is coupled with the frequency (probability) of that level of hazard occurring.

  • NOTE: 1 This is then plotted on a matrix to determine the level of risk associated with that job.
  • NOTE: 2 If the level of risk is not acceptable, control measures are introduced to reduce the risk to an acceptable level.

Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards

 

RA

Risk assessment.

Source: API RP 98, Personal Protective Equipment Selection for Oil Spill Responders, First Edition, August 2013. Global Standards

RA

Reliability and availability.

Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards