July 2018 www.chemengonline.com 07 Maintaining Heat-Transfer Fluid Quality Flow Measurement Urban Mining Predictive and Preventive Maintenance Plant Expansions page 32 Retrograde Condensation Biosludge Drying Facts at Your Fingertips: Packaging Focus on Safety HEAT-TRANSFER FLUIDS * FLOW MEASUREMENT VOL. 125 NO. 7 JULY 2018http://www.chemengonline.com