HP Engineering Case Histories: Case 80: Sudden temperature change in a centrifugal compressor

Sofronas, A., Consulting Engineer

A process upset occurred that caused the gas temperature of a centrifugal compressor to increase from the design condition of Tstart = 300°F to Tinf = 600°F in t = 0.25 hours. Some engineers..

HP Viewpoint: Optimize control systems with preventive maintenance

Parisi, P., Compressor Controls Corp.

Ensuring equipment integrity by conducting thorough maintenance provides multiple benefits, from maximizing machine uptime and minimizing process shutdowns, to prolonged equipment service life and imp..

HP Reliability: Things to know and do before starting new initiatives

Bloch, Heinz P., Hydrocarbon Processing Staff

HP editors frequently attend technical conferences to keep informed on the many factors impacting the hydrocarbon processing industry (HPI). The focus of these conferences often differs. However, one ..

Automate furnace controls to improve safety and energy efficiency

Mickity, D., Phillips 66

Furnace firing is the biggest single operating expense in any refinery. Consider a medium-size refinery (250,000 bpd) that consumes 2,000 MMBtu/h. At a cost of $5/MMBtu, that’s $87.6 MM/yr being ..

Use online conditioning to monitor electric motors

Wilhelm, B., GE Measurement and Control; Neti, P., GE Global Research Center

Quality and health assessments of motor insulation are important aspects during the manufacturing, as well as the operation, of electrical motors. Today, there are several offline insulation quality a..

HP Reliability: Make equipment decisions with up-to-date technical information

Bloch, Heinz P., Hydrocarbon Processing Staff

Answering lube practice-related questions is important. These questions provide insight on the status of education and technology, along with trends in understanding equipment reliability, safety and ..

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..