Semi-quantitative Risk Assessment Matrix for Rotating Equipment

In petrochemical, power generation, oil and gas industries and in variety of other sectors
rotating equipments are in use to fulfill production requirements. Failure of rotating equipment,
especially in such industries can result to risk related issues. A well implemented rotating
equipment risk assessment strategy is most needed to achieve desired plant availability and
efficiency. In this research semi-quantitative risk assessment approach is proposed to evaluate the
risk of rotating equipment and categorize their associated failure risks. Borda ranking is adopted to
evaluate the risk in order to minimize risk ties which exist in risk matrix. Compressor is taken as
case study to show the applicability of the proposed method for rotating equipment. It was observed
that risks of selected failure modes of gas turbine compressor fall in the categories of serious and
medium levels based on risk matrix. Rotor bend distortion, blade failure or inlet guide vane failures
needed more attention for treatment based on Borda ranking.