Corrosion
HP Innovations
ALL offers seven-crane packageThe ALL family of companies has expanded its fleet of all-terrain and hydraulic truck cranes with the addition of seven new Grove machines. With varying sizes and capacit..
Is your plant vulnerable to a brittle fracture?
Much of the process equipment operating today was designed to construction codes that did not require a formal evaluation for low-temperature considerations. Metal temperature highly influences the fr..
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...
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