Category: Process Plants Instrumentation
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Tube & Tube Fittings – Instrument Tubing Connections
Tube is a hollow structure that is designed to provide an enclosed pathway for fluids to flow just in the same way as the pipe. Tubes are manufactured from rolled or extruded metal however plastic is a common tube material for many industrial applications. In this article we discuss some of the common methods for…
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NAMUR NE 43 for Process Instrumentation Diagnostics
NAMUR NE 43 is a recommendation that seeks to promote the standardization of the signal level for failure information. The objective of NAMUR NE 43 is to set the foundation for proactively employing transmitter failure signals in process instrumentation and control. Using these failure signals, instrument faults are separated from process measurements. Because the faults…
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Pipe & Pipe Fittings: Common Connection Types & Features
Instruments may be connected to their corresponding processes and to each other by using pipe, tube and/or wires. In this article we focus on pipe and pipe fittings; the common techniques for joining pipes together and joining pipe ends to equipment such as flow measurement instruments. Pipe and Pipe Fittings Pipe can be defined as…
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China First Eco-Friendly High-Temperature Melt Pressure Transducer Without Mercury Filling
Ziasiot Sensor pioneered China’s first mercury-free, eco-friendly high-temperature melt pressure transducer, which marking a significant technological breakthrough in the melt pressure industry. A Safer Alternative for extrusion melt pressure applications Traditional melt pressure transducers and thermometers have long relied on mercury (Hg) as a filling medium. However, mercury poses severe health and environmental risks due to its toxic…
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Standard Pipe Sizes
The pipe size is normally specified with two numbers i.e. the nominal pipe diameter (or bore) and the pipe schedule. This then sets the outside pipe diameter, the wall thickness and thus the internal diameter. With the exception of specialist applications, commercially available pipes come in standard sizes. Pipes manufactured in standard sizes are available…
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Why Kunkle Valves Are the Go-To Choice in the Steam Industry
In the world of steam systems, where safety, efficiency, and reliability are non-negotiable, choosing the right pressure relief valve is critical. One name that consistently comes up in the conversation is Kunkle. With a long-standing reputation for quality engineering and robust performance, Kunkle valves have become a trusted solution across industries that rely on steam—including…
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How to Size a Control Valve
Control valve sizing refers to the procedure determining the correct size of a valve body. A valve sizing equation for incompressible fluids is given by: Which is the same as: Where Cv is the valve flow coefficient/valve capacity P1 = Upstream fluid pressure P2 = Downstream fluid pressure ρ = Mass density of fluid Q…
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Standard Process Signals for Industrial Instrumentation
Industrial measurement and control processes employ standard process signals that are used throughout all the industries. For instance, one of the most popular forms of signal transmission in modern industrial instrumentation systems is the 4-20 mA DC standard. The signal standards employed in industrial instrumentation are unique. Processes are referred to or measured as 0%…
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Instrumentation Systems Installation: Precautions to Take
Analog systems are normally based on low voltages and as a result, they are vulnerable to electrical noise. In most plants, a PLC may be controlling 415 V high power motors at 100 A, and at the same time, reading thermocouple signals of a few mA. Great care must therefore be taken to avoid interference…
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Basic Facts about 4-20 mA current loop in Process Instrumentation
The 4-20 mA current loop, like the one shown in the diagram below is a typical way of transmitting sensor information in most of industrial process monitoring applications. A sensor in this case is a device used to measure the physical parameters such as liquid flow rates, temperature, pressure, speed, and so on. The 4-20…