Hawiyah Gas Plant was commissioned in 2001 with three Gas Treat Units (GT#1, 2 & 3), and in 2009 two more units were commissioned (GT# 5 & 6) to increase the plant production capacity. Each Gas Treat Unit has three DGA Booster pumps G-*08A/B/C, where two pumps are running and one is in auto-start standby for more reliable production.
The history maintenance record shows only two failures of GT#5 DGA Booster Centrifugal pump has occurred since 2009. The first failure took place in February 2011 and the other, in February 2013. The main root cause of failure was pump seizure due to contact between pumpÕs impeller and casing wear rings.
In this presentation we will highlight important steps to investigate a failure, analyze the symptom that promoted the failure, and the significant
information that must be collected from the field. Issues such as how thermal growth can affect the centrifugal pump and how we utilize the background information application procedure to mitigate failure will be discussed. In this case study, the preliminary investigation indicated that the pump startup procedure was not being followed properly. Moreover, we utilized the taproot analysis methodology in this study to identify the true root cause of the failure. A list of recommendations was issued for the unit’s key personnel to avoid failure reoccurrence. By this investigation and analysis we confirmed the effect of thermal growth on the centrifugal pumps.