Analysis of the build-up to the fracture of a compressor crosshead led a refiner to revise its approach to performance monitoring

Compressor crosshead fractures are costly, leading to unplanned outage of the system and loss of production. PROGNOST Systems claims that the development of fractures in the motion work, especially on the crosshead, can be detected by using segmented peak-to-peak piston rod position analysis.

The company also recommends this as a mandatory parameter and for safety interlock. This claim was proven to be true by a complete fracture of a crosshead which could have been avoided if the automatic interlock had been activated by the operator. The experience of this case also motivated the operator to improve their site shutdown philosophy.

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