Motors

HP Reliability: Small deviations can compromise equipment reliability

Bloch, Heinz P., Hydrocarbon Processing Staff

In 2013, a major refinery was experiencing serious pump problems. The refinery had a massive thrust-bearing failure on a critical 3,560-rpm pump. The pump was designed and manufactured by a well-known..

Case study: Service life assessment of boiler superheater tubes

van Zyl, G., Al-Meshari, A., Al-Shahrani, S., SABIC Technology Centre

Boilers are used in petrochemical facilities to generate steam that can be used to meet process and utility requirements. Many industrial boiler designs can be shop assembled and are therefore referre..

Reciprocating compressors running together—Is that a problem?

Knight, C., KnightHawk Engineering, Inc.

A new maintenance engineer is assigned the task of overseeing large, critical rotating equipment in a petrochemical facility (Fig. 1). In this example, the facility has vent-gas compressors that, in g..

HP Reliability: Consider single-point responsibility for compressors

Bloch, Heinz P., Hydrocarbon Processing Staff

Equipment purchasers are always interested in meeting the cost and schedule targets for projects. However, there could be conflicting goals when purchasing compressor drivers and/or auxiliaries from v..

HP Reliability: Best practices when trim-cutting closed-pump impellers

Bloch, Heinz P., Hydrocarbon Processing Staff

Experienced reliability professionals will implement least-risk solutions whenever possible. The following example relates to impeller trimming to reduce the diameter of a fixed-speed centrifugal pump..

HP Engineering Case Histories: Case 77: Random deck vibration with beats

Sofronas, A., Consulting Engineer

When something vibrates, it is usually in a predictable manner. Motors, pumps, compressors, turbines and centrifuges all vibrate when they are out of balance. Vibration analysis can help predict the s..

Update on lubrication systems

Bloch, Heinz P., Hydrocarbon Processing Staff

Several case histories illustrate the pros and cons for maintaining rotating equipment under various plant conditions.Example 1In late May 2013, a US oil-mist provider in one of the Great Lakes states..

Control moisture in ‘wetted’ rotating equipment

Barnes, M., Morgan, D., Des-Case Corp.

In turbomachinery, water is one of the most deleterious contaminants. Left unchecked, moisture can severely reduce the service life expectancy of oil-wetted rotating and reciprocating components by as..

Improve quality of lubricating fluids via filtration

Kroger, K. G., Puradyn Filter Technologies

Micro-sized dust particles, along with water, can ruin the best lubricating fluids. Contamination of lubricating fluids can occur due to the byproducts of combustion, metal wear, oxidation and more. T..

HP Reliability: Was that a failure or ‘just a repair’?

Bloch, Heinz P., Hydrocarbon Processing Staff

Purists among reliability professionals are sometimes concerned about the accuracy of the measurement of the mean-time-between-failure (MTBF) of an asset. There are many ways to conduct this failure f..