classic | mobile
 

Search...

SA Instrumentation & Control Buyers' Guide

Technews Industry Guide - IIoT 2018

Technews Industry Guide - Maintenance, Reliability & Asset Optimisation

 

New thermowell reduces fatigue failure
August 2018, Temperature Measurement


Emerson has released the Rosemount Twisted Square Thermowell line, a solution that reduces dynamic stress, simplifies process calculations and provides more accurate temperature measurements. This new design was developed to address these issues while meeting demanding production requirements, increasing output and ensuring high product quality.

Twisted Square Thermowells improve reliability and reduce risk of fatigue failure through their ability to dampen dynamic stresses caused by oscillating vortex pressures. These dynamic stresses can result in vortex-induced vibration (VIV), which is the primary source of thermowell stress failures.

The new design reduces VIV by over 90%. This helps to simplify process calculations by eliminating the need to size thermowells to reduce dynamic and frequency limits, saving engineering time and lowering costs without requiring design changes. It is ideal for use where conventional thermowells fail to meet the globally-accepted ASME PTC 19.3 TW standard for safe and reliable thermowell design.

Twisted Square Thermowells solve these challenges at a time when manufacturers are relying more on applications that require them to withstand harsh or changing process conditions.

Typically, conventional thermowells are shortened and/or the outer diameter is increased to avoid vortex induced vibration. These changes can result in decreased accuracy and/or slower response times for the measurement point. The dimensional adjustments recommended by the ASME PTC 19.3 TW calculations are often acceptable to maintain an appropriate measurement point, but in some cases, they may compromise temperature accuracy, making it difficult to implement.

“We wanted to offer a solution that would give our customers more options when they run into process design challenges,” said Jack Reuvers, Emerson lead engineer. “When changes happen during the late phases of projects it can delay start-up times and add a lot of extra cost and stress. Our solution not only provides more options, but can also save on design costs while supplying high-accuracy temperature measurements with a safe, robust design.”

For more information contact Rob Smith, Emerson Automation Solutions, +27 11 451 3700, rob.smith@emerson.com, www.emerson.com


Credit(s)
Supplied By: Emerson Automation Solutions
Tel: +27 11 451 3700
Fax: +27 11 451 3800
Email: rob.smith@emerson.com
www: www.emersonprocess.com/mea
Share via email     Share via LinkedIn   Print this page

Further reading:

  • Oven temperature profiling in the automotive industry
    January 2019, R&C Instrumentation, Temperature Measurement
    For successful paint cure, irrespective of the paint chemistry being used, it is critical to measure and control the temperature of the car body as it travels through the oven. Today, paint ovens are ...
  • Control in paint shop applications
    January 2019, Temperature Controls, Temperature Measurement
    A logical combination of heating method and control is radiant heat with an Exergen IRt/c for control. The combination works well together since both the heating and measuring occur right at the surface ...
  • IR thermocouple offers noise immunity
    January 2019, Temperature Controls, Temperature Measurement
    With twisted shielded pair thermocouple extension wire, an Exergen IRt/c can be mounted as far as 300 metres from the readout device, even in harsh electrically noisy environments. The extraordinary noise ...
  • Handheld infrared thermometers
    January 2019, ASSTech Process Electronics + Instrumentation, Temperature Measurement
    Within the Calex range of infrared temperature sensors is the ST680 Series of high-quality handheld thermometers with laser sighting and large backlit LCD display. The instruments measure in a wide temperature ...
  • Panel-mounted thermostat with safety feature
    January 2019, ASSTech Process Electronics + Instrumentation, Temperature Measurement
    Jumo’s new heatTherm P300 3-phase panel mount thermostat is available with a maximum switching capacity of 30 A/480 V. An important new safety feature capability is the trip-free function. The electromechanical ...
  • Emerson to buy General Electric’s Intelligent Platforms business
    December 2018, Emerson Automation Solutions, News
    Emerson has announced that it has agreed to acquire Intelligent Platforms, a division of General Electric. Intelligent Platforms’ programmable logic controller (PLC) technology will enable Emerson to ...
  • Temperature measurement within the plastics industry
    December 2018, Instrotech, Temperature Measurement
    Temperature is an important measurement parameter for many process techniques used in the plastics industry. Non-contact temperature measurement using an infrared sensor system is therefore an effective ...
  • Emerson’s compact new hygienic transmitters
    December 2018, Emerson Automation Solutions, Temperature Measurement
    Emerson has unveiled a new line of compact transmitters. Designed specifically for hygienic applications in the food and beverage industry, they will enable manufacturers to minimise downtime and lower ...
  • IRt/c setup with auto-tune ­temperature controllers
    November 2018, Temperature Controls, Temperature Measurement
    In many applications, heating elements are employed to heat a product in an oven, furnace, or with jets of hot air. Conventional control devices using contact thermocouples, measure and control the oven ...
  • SpotScan gives pyrometers ­scanning ability
    November 2018, R&C Instrumentation, Temperature Measurement
    Fluke Process Instruments recently introduced the SpotScan line scanning accessory for the Endurance, Marathon, and Modline ranges of IR non-contact temperature measurement sensors. The accessory features ...
  • Emerson opens flow calibration centre for Middle East and Africa
    October 2018, Emerson Automation Solutions, News
    Emerson has recently opened the Middle East and Africa Flow Service Centre at its Dubai campus. The facility will operate as a service centre for customers in the Middle East and Africa, offering internationally ...
  • Safety temperature measurement device for boilers
    October 2018, GHM Messtechnik SA, Temperature Measurement
    The Safety-TL4896, a SIL2 rated temperature measuring device from Martens, conforms to international boiler regulations and offers a unique front panel installation. Certified to DIN EN14597 and DIN EN61508, ...

 
 
         
Contact:
Technews Publishing (Pty) Ltd
1st Floor, Stabilitas House
265 Kent Ave, Randburg, 2194
South Africa
Publications by Technews
Dataweek Electronics & Communications Technology
Electronic Buyers Guide (EBG)

Hi-Tech Security Solutions
Hi-Tech Security Business Directory

Motion Control in Southern Africa
Motion Control Buyers’ Guide (MCBG)

South African Instrumentation & Control
South African Instrumentation & Control Buyers’ Guide (IBG)
Other
Terms & conditions of use, including privacy policy
PAIA Manual





 

         
    classic | mobile

Copyright © Technews Publishing (Pty) Ltd. All rights reserved.