Chemical Technology October 2016

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Contents

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REGULAR FEATURES 2 Cover story

PLANT MAINTENANCE 18 Pressure relief device monitoring: How to detect releases, leaking and fugitive emissions Every country has regulations to protect industrial plants and facilities against overpressure in various processes and operations. In the US, the American National Standards Institute (ANSI), the American Society of Mechanical Engineers (ASME) and the American Petroleum Institute (API) provide detailed information on best practices for overpressure protection. Information provided by Emerson Process INNOVATION 26 • Using nature’s own solvents for the preparation of pure lignin • Innovative passively cooled instrumentation shelters • Flash of brilliance: CALIPSO satellite marks ‘First Light’ • New class of fuel cells offer increased flexibility, lower cost 22 Focus on plant maintenance

4 Comment

Transparency You Can See Average circulation (Q2 Apr – Jun 2016) 3 621

28 Et cetera

30 Spotlight on SAIChE IChemE/SAIChE IChemE News

32 Sudoku No 120 and solution to No 119

Chemical Technology is endorsed by The South African Institution of Chemical Engineers

PUMPS AND VALVES 5 Coal, pump design and smart maintenance

The complexity of a coal preparation plant varies according to the nature of the raw material, the requirements for the end product and the local regulations around water use and waste production. Information provided by Weir Minerals Africa

8 Focus on pumps and valves

and the Southern African Association of Energy Efficiency

WASTE MANAGEMENT 10 Treatment of radioactive gaseous waste

This article focuses on the treatment of radioactive gaseous waste streams arising from the operations in fuel fabrication facilities, nuclear power plants, fuel reprocessing facilities and waste processing facilities. IAEA document edited by Carl Schonborn, Pr Eng

DISCLAIMER The views expressed in this journal are not neces- sarily those of the editor or the publisher. Generic images courtesy of www.123rf.com

14 Focus on waste management

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Chemical Technology • October 2016

http://www.chemicaltechnologymagazine.co.za