A A JULY 2022 | Volume 101 Number 7 HydrocarbonProcessing.com 69 22 SPECIAL FOCUS: VALVES, PUMPS AND TURBOMACHINERY 23 Use a simple vapor equation for sizing two-phase pressure relief valves J. S. Kim, J. Lopez, P. Li and R. Haines 29 The effects of highly corrosive fluids on valves and disasters that can be avoided G. Welsford 33 Fouling in hydrogen recycle gas compressors S. Zardynezhad 35 Accurately calculate flowrate through valves, fittings and pipe under a turbulent flow regime I. Garcia and A. Garcia CIRCULAR ECONOMY 37 Enabling a circular economy delivery model through truckable modularization M. Villegas 100TH ANNIVERSARY 41 History of the HPI 48 HP Flashback PROCESS OPTIMIZATION 51 MAA refinery's experience producing Europe's most-stringent diesel specification M. B. Matar, A. Al-Mane and A. Y. Layri 57 HRSG water/steam sampling: Do it right or face potential consequences B. Buecker and J. Powalisz 63 Caustic tower design guidelines and recommendations A. Sharma CATALYSTS 69 Hydroprocessing catalyst reload and restart best practices-Part 1 S. Dyke and N. Pongboot MAINTENANCE AND RELIABILITY 74 Storage tank settlement and soil-side corrosion assessment with optimized repair strategy M. Alsaiari and F. Alghamdi 77 Developing and utilizing a novel, toughened epoxy adhesive I. Wade Cover Image: A worker inspects a gas turbine rotor at a Siemens' gas turbine plant. Photo courtesy of Siemens. N DEPARTMENTS 4 Industry Perspectives 8 Business Trends 81 Advertiser Index 82 Events COLUMNS 7 Editorial Comment No flow, no go: Stressing the importance of flow control technologies 13 Reliability When to consider liquid-ring compressors 15 Optimization Integrity operating windows management 17 Environment and Safety Gas flaring: Necessary, or a waste of resources and a source of greenhouse gases? 19 Digital Layering up to avoid the cold realities of asset performance silos 20 Valves, Pumps and Turbomachinery Achieving the right installation torque with a virtual calculation DIGITAL EXCLUSIVES Innovations WEB EXCLUSIVE People R N S Y IV E Rhttp://www.HydrocarbonProcessing.com