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Operations & Maintenance

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Pad-Reinforced Nozzles in Pressure Vessels

This article examines the application of reinforcing pads for strengthening nozzles in pressure vessels and the impact of the geometric gap that exists between the pad and the vessel shell Many common forms of nozzle connections in technological applications are…

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Separating Hazardous Materials with Decanter-Centrifuge Systems

Sealed and gas-purged decanter-centrifuge systems can be effective for separating Class I, Div. 1-, or Class I, Div. 2-rated solvents and hazardous materials Traditionally, solids and liquids have been separated by filtration or with press equipment. While these methods are…

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Sliding Vane Pumps

Sliding vane pumps offer a potent processing option for low-viscosity liquids Multiple industries rely on process pumps for handling a variety of substances that help the world function as it does today. Those substances come in a wide variety of…

A Primer on LPG Storage Systems

Any loss of containment for liquefied petroleum gas (LPG) can have potentially catastrophic results. This article details various LPG storage configurations with special focus on the design of mounded-bullet systems Liquefied petroleum gas (LPG) is a mixture of propane and…

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Benefiting from Nozzle Flexibility in Piping Design

The inclusion of nozzle flexibility (directional spring rate) in pipe-stress analysis results in more realistic piping reactions on pressure-vessel nozzles, whereby it will be easier to meet the limited nozzle-load capacity of the nozzles. It will surely contribute to a…

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Improving PRV Cost of Ownership with Upstream Rupture Discs

The costs associated with installing and maintaining pressure-relief valves (PRVs) can often be reduced by equipping systems with upstream rupture discs Reclosing pressure-relief devices, commonly referred to as pressure relief valves (PRVs), are designed to allow for the release of…

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Modular Construction: Choosing the Optimal Module Type

Plant process modules are not a one-size-fits-all solution. These considerations can help determine the best size for your project With the growing recognition of the advantages of modular construction over traditional field construction [1, 2], it’s no surprise that an…

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A Holistic Approach to Asset Risk Management: Is it All or Nothing?

By combining mechanical integrity and reliability programs into a single framework, plants can streamline their asset maintenance strategies and mitigate all types of risk Asset maintenance first hit the headlines during the late 1980s when it became a target for…

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Innovations in Seals and Gaskets Boost Reliability

New designs and materials overcome high temperatures, pressures and aggressive media In the chemical process industries (CPI), standard equipment is often capable of working universally across many applications. However, this same notion does not apply to the sealing elements used…

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Calibration of Weighing Instruments

A guide to the practical considerations of calibrating weighing instruments is presented here Throughout the chemical process industries (CPI), weighing instruments find a range of important uses and are often a critical piece of equipment for many processes. Monitoring feed…