September 2003Temperature Measurement
Integrated Solutions
Piping for some hot process applications requires thermal maintenance devices to keep stream-end piping temperatures within specific limits. In such cases, conventional pipe jacketing has been regarded as a sufficient, but often very expensive, option. One alternative to pipe jacketing, tube tracing, does not effectively prevent problems caused by temperature variations along the process pipe wall. Frequently, tube tracing is used as an economical way to compensate for heat loss.
In low-temperature applications with broad temperature envelopes,steam tracing can be effective. However, in these types of applications, the position of the tracers and the temperature distribution in the pipe material are not considered important.
A new system for process temperature maintenance and uniform pipe wall temperatures consists of contoured bolt-on trace elements. Comparable in price to tube tracing, these elements are positioned strategically after heat dynamics in the operating piping system are modelled.
To prevent problems caused by unwanted heat variation, frequently the key is ensuring uniform pipe wall temperature. To accomplish this, it is necessary to manage the heat distribution in the pipe wall.
Proper heat distribution management depends on the number and placement of heating elements. This placement, in turn, depends on accurate modelling of process thermodynamics. Therefore, the heating element vendor should employ accurate process thermal analysis software for this purpose.
The figure provides an example of process thermodynamics modelling. Heat from steam at 159°C is applied from a contoured heating element to a pipe wall at defined intervals. Directly under the element, the wall temperature is 147°C. Note the decrease in wall temperature as the distance from the element increases, until a minimum of 132°C is reached.
The pipe’s wall temperature decreases as the distance from the heat element increases, until a minimum of 132°C is reached
At this point, heat conducted through the pipe wall from another heating element causes the wall's temperature to rise again. The wall temperature varies within a defined range, and the warmest and coolest points also can be identified readily.
Solving plant problems
The application of contoured pipe tracing after detailed thermal analysis has prevented problems caused by mixed vapours in sulphur processing at one plant, and addressed concerns associated with a common anhydrous vapour process in another facility. In the first case, the system prevented condensation and associated pipe corrosion. In the second, it prevented pipe blockage from precipitated material.
Three ways to conduct thermal inspections Comtest
Temperature Measurement
There’s no universal solution for all infrared inspections with a Fluke thermal camera, also known as a thermal imager. You need to match your method to the type of equipment you’re inspecting and the level of detail you require.
Read more...Modern N1020 temperature controller
Temperature Measurement
Temperature control is a fundamental aspect of maintaining the integrity and quality of products in industries such as food processing, pharmaceuticals and healthcare. The N1020 temperature controller, designed for precision and reliability, addresses the stringent requirements of these sectors by offering advanced features and robust functionality.
Read more...Safer, simpler temperature measurement ABB South Africa
Temperature Measurement
ABB has launched an enhanced version of its NINVA TSP341-N non-invasive temperature sensor, delivering safer and simpler temperature measurements for applications in the chemical, oil and gas industries.
Read more...Smart high-precision pyrometers
Temperature Measurement
LAND, a business of AMETEK, has expanded its range of SPOT+ smart high-precision pyrometers with the launch of the M390, M3-5 and TMT for wider temperature measurement capabilities.
Read more...Detecting lubrication issues in gearbox testing by IR monitoring
Temperature Measurement
Lubrication is crucial for every transmission gearbox. Thermal imaging cameras such as Instrotech’s PI 640i can quickly and accurately detect temperature variations to ensure that gearboxes are appropriately lubricated.
Read more...Security industry embraces mobile credentials, biometrics and AI
AI & Data Analytics Access Control & Identity Management Integrated Solutions
As organisations navigate an increasingly complex threat landscape, security leaders are making strategic shifts toward unified platforms and emerging technologies, according to the newly released 2025 State of Security and Identity Report from HID.
Read more...Insurance provider uses Net2 For access management Paxton
Access Control & Identity Management Integrated Solutions Healthcare (Industry)
BestMed selected Paxton Net2 for its access control requirements because of its simplicity of installation and ease of navigation for end users, as well as the 5-year warranty.
Read more...The power of knowing your client Ideco Biometrics
Access Control & Identity Management Integrated Solutions
One of the most effective ways to combat the threat of fraud, identity theft, and financial crime threats is through a robust Know Your Client (KYC) process, which safeguards both businesses and clients.
Read more...Managing identities for 20 years Ideco Biometrics Technews Publishing SMART Security Solutions
Access Control & Identity Management Integrated Solutions IoT & Automation
Many companies are now more aware of the risks associated with unauthorised access to locations and sensitive data and are investing in advanced identity authentication technologies to mitigate these threats.
printer friendly version