Finding flaws with Forensic Analysis

A fertilizer plant in the Gulf of Mexico experienced a suction cavity high pressure ceiling leakage in one of their BB5 boiler feed pumps. By utilizing a forensic analysis, Hydro discovered a simple shortcut in the manufacturing process was costing thousands of dollars in repairs and great inconvenience.

Written by: Pete Erickson and  Todd Soignet
Published by: World Pumps

A BB5 barrel pump at a fertilizer plant along the Gulf of Mexico experienced reduced capacity due to suction cavity high pressure sealing leakage. This was not the first time their boiler feed pumps had experienced a loss of capacity. The pumps were only about a year and a half old and were part of a major expansion project at the plant.

Due to high lead times, the plant decided not to continue repairs, but instead do a simple swap out, when a Hydro service center was recommended by the client’s sister plant as a credible supplier who had the technical and engineering expertise needed to rebuild pumps to the highest quality standards.

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Beware the Cheap Fix: You May Get What You Pay For

Fossil plant required an emergency rebuild when poor quality repair caused a holiday shutdown. 

Written by: Dr. Gary Dyson & Mohamed Mohamed
Published by: Pumps & Systems

The consequences of poor quality repairs can result in premature failure, unplanned outages and higher repair costs because follow up after the initial attempt is considered an emergency repair. That was the situation when a major fossil plant experienced an emergency failure of a six-stage, boiler feed pump element. It was a quiet holiday night when the pump had to be pulled due to lack of flow, causing a plant shutdown. Unfortunately, when the plant tried to set the spare element up on bearings, employees were unable to turn the rotor. In this case, the emergency occurred when the repaired spare element had to be used immediately after initial failure. Thus, the problems with the previous repairs were uncovered.

Because it was the holiday season, the plant’s usual service provider could not respond in the required time. Another Hydro was called in to assess the problem, engineer a solution and save the plant thousands of dollars in downtime.

Field service was mobilized to provide labor in two 24-hour shifts.

Worthington element

Image 1. Worthington element set on precision v-blocks, checking vertical and horizontal clearances at the suction end and discharge end. These checks are used to see if element is concentric.

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