Currently viewing the tag: "flow"
While using best practices for your process control and instrumentation would seem obvious, best practices are not always common practices. Often times plants are unaware of a better way to control the process. The common adage is this is the way we have always done it. Similar to new technology, best practices take current technology […]
The chemical reactions are the most critical processes in a chemical plant. Reagents, catalysts and feedstocks are combined in chemical reaction vessels to produce other more valuable chemicals. Sometimes these are finished products. Other times these products are used as feedstocks to other chemical processes. Chemicals engineers earn their keep by developing the process and […]
A client of mine recently asked me what information was needed to create an instrument specification for a project. Naturally, this was the start of a fairly in-depth conversation. Overall, an instrument specification needs to be specific enough to ensure the solution exactly meets the process need. You don’t want an instrument that is not […]
Industrial gas is used in many applications in a process plant. Nitrogen is used for tank blanketing or to eliminate oxygen in a combustible environment. Oxygen can be used in a process reaction or in waste water treatment to eliminate organic compounds. Industrial gases are generally part of utilities, which are […]
The first wake frequency calculation standard was published by AMSE is 1974 and was based on a paper written by J.W. Murdock in the 1950s. This is the ASME PTC 19.3-1974 standard. However, it did not account for all installations. The Monju Fast Breeder reactor was shut down due to a leak in a liquid […]
Advanced diagnostics is the name given to a class of transmitters that provide additional information about the condition of itself and the process. In addition to internal electronics problems, advance diagnostics can alert you to power supply issues and condensation in the housing. Another feature is statistical process monitoring. Rather than just measuring […]
There are many kinds of flowmeters that can be used for steam and gas applications. These range from basic variable area (rotameter) and turbine flowmeters, to more advanced differential pressure (DP) and vortex flowmeters. While these are all good technologies the process will generally dictate which flowmeter should be used. Considerations are installed cost, permanent […]
Pretty much every process plant has a boiler for the generation of steam. Steam is a commodity that is widely used around a process plant for many different applications. These include heating, steam jacketing, steam tracing, power generation (turbomachinery). In the case of high temperature applications, […]
Since the creation of the first transmitter there has been a marked shift in technology. This includes the technology used for both transmitters and process control systems. The early pneumatic (3 – 15 psi) systems gave way to electronic systems (4-20mA), which eventually lead to digital protocols (HART, Foxcom, […]
Custody transfer is defined as the way to measure the commercial exchange of a commodity. When a business purchases a commodity, there is a pre-established method to verify the amount of product purchased. Gasoline, chemicals and even milk is all traded this way. It is common to use a weigh scale for custody transfer. The […]
