Feature Report
Selection of Severe Service Valves
Severe service valves (SSVs) differ from general purpose valves in important ways. Presented here is guidance on how to increase service life, reduce costs and improve safety and environmental performance of SSVs Severe service valves (SSVs) are often identified by…
Storage Tanks: Heating and Cooling System Design
Various heating or cooling options are described here, along with the factors and design parameters that need to be considered. A sample calculation regarding coils is included Tanks constitute important equipment in the chemical process industries (CPI). Various types of…
Crossflow Membrane Filtration Essentials
Several aspects of crossflow membrane filtration, including process design, equipment selection and control, are detailed here A membrane, also referred to as a semipermeable membrane, is a thin layer of material that selectively passes one or more components of a…
Gas-Phase Filtration Media Properties: What to Know
There are many physical properties that can impact the ultimate performance of adsorbent media in gas-phase filtration applications Gas-phase filtration media specifications may list numerous physical parameters, such as shape, moisture content, bulk density, impregnation level, size and hardness (crush…
Eye Protection, Part 1: Beyond Basic Eye Safety
How to protect, preserve and enhance workers’ safety Safety eyewear (Figure 1) is among the most prevalent types of personal protective equipment (PPE) worn across the chemical process industries (CPI). It protects an individual’s most valuable sense — vision —…
Eye Protection, Part 2: How to Avoid Fogging
A look at the hidden dangers of lens fogging and how to prevent them Fogging is the number one problem faced by safety eyewear users in the chemical process industries (CPI; Figure 1). Across applications, both indoors and out, the…
A Primer on Compressor Design
From initial conceptualization to final calculation, designing compressors requires not only engineering intuition and robust simulation tools, but also a bit of creativity As technology has evolved, so has the refrigeration industry. What were once holes in the ground filled…
High Purity Chemicals: Processing Equipment Essentials
Some practical tips regarding the design and fabrication of piping systems and equipment for high-purity applications are presented here Chemical processing, and the chemical process industries (CPI) on the whole, have evolved lightyears beyond their very beginnings — beginnings in…
Pressure Measurement: Handling Difficult Process Applications
A better understanding of what pressure instruments do and how they work can help improve measurement performance, especially in troublesome applications Effective use of process instrumentation is critical in any chemical manufacturing environment. These instruments are strategically located throughout various…
Measuring Differential Pressure: Mechanical or Electronic?
Users should consider both options when selecting a DP device. Understanding the differences can help make the decision for a given set of process conditions Differential pressure (DP) measurements are used in many branches of the chemical process industries (CPI)…