Corrosion
HP Project Management: Case history: Hurdles in dismantling a vintage ammonia plant
Dismantling an ammonia plant is a daunting task under any circumstances. It is even more problematic when the facility is located in a remote place such as central Pakistan and managed by local contra..
What is the impact of US shale oil on global markets and refinery configurations?
One of the most important factors in determining a refinery’s profitability is its ability to access low-cost feedstocks. This is not to be confused with survivability. Some uneconomic refineries..
Improve compressor reliability with advanced chemical treatments
Although many olefin plants are making big investments in hardware and metallurgy to improve compressor performance and to extend run lengths, the reliability, efficiency and throughput capacity of the CGC are still key influences on plant profitability.
Case history: Troubleshooting a leaking valve in a hydrogen unit
A Middle East refinery installed a hydrogen plant that was designed to produce 20,000 Nm3/hr of pure hydrogen (H2) to support a diesel hydrotreater. The unit was commissioned in 2006. This H2 plant wa..
HP Engineering Case Histories: Case 80: Sudden temperature change in a centrifugal compressor
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..
Improve performance of exchangers in quench-water services
Dual-enhanced (DE) tubes are widely used in shell-and-tube heat exchangers (HEXs) in a range of industries. They have become a standard in multiple clean services for the hydrocarbon processing indust..
A chemist’s perspective on organic fouling in ethylene operations
Since organic fouling cannot be completely eliminated, ethylene producers must use operational, chemical and mechanical methods to minimize heat transfer losses and equipment downtime.
HP Engineering Case Histories: Case 79: Integral compressor failures
Recently, the author received information regarding the failure of a large reciprocating compressor. In this example, the pistons for power and compressor cylinders are powered by the same crankshaft...
Micro-alloyed steel: New standard for reformer tubes
Reformer furnace tubes are designed to operate under high temperature and pressure. Historically, these tubes exhibit improved creep resistance at higher temperatures. The improvements in creep resist..
HP Reliability: Make equipment decisions with up-to-date technical information
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 ..
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