Products
About Thermowells
Overview
Thermowells (1) are closed-end metal tubes installed pressure-tight into process vessels or piping, protecting temperature sensors (2) from harsh industrial process conditions, such as flow-induced stress, high pressure and corrosive chemicals. Additionally, thermowells allow the sensor to be easily removed from the process for calibration or replacement without requiring a process shutdown. Based on the stem profile, you can optimize your thermowells for response time or robustness. For the most accurate temperature measurement, size your thermowell to place the tip in the center of the pipe.
Rosemount Thermowell Design Accelerator
Eliminate the #1 Pain Associated with Thermowell Design
On average, engineers spend 50 hours calculating thermowells per project. Temperature points often need 3-4 recalculations per thermowell tag with traditional trial-and-error methods to pass ASME standards.
The Rosemount Thermowell Design Accelerator is a free online thermowell calculation tool that allows you to execute thermowell calculations up to 90% faster and reduces design time to just 15 minutes. It’s easy to use and guides you through complex projects, saving hours of wasted labor and resources. Calculations use ASME PTC-19.3 TW criteria for safe results to protect processes and the people that operate them.
About ASME PTC 19.3 TW
Temperature is the most measured variable in process the industry. Even small measurement errors can have a detrimental effect on efficiency, energy consumption, product quality or safety.
ASME provides 4 quantitative criteria for efficient and safe design: Frequency, Dynamic Stress, Steady State Stress and Hydrostatic Pressure Limits.
Emerson's Rosemount Thermowell Design Accelerator conforms to the PTC 19.3 TW standards to continue serving designers as ASME founders started more than century ago.
Technology
Resources
Frequently Asked Questions
Thermowells are closed-end metal tubes that are installed into the process vessel or piping and become a pressure-tight integral part of the process vessel or pipe. They allow the temperature sensor to be quickly and easily removed from the process for calibration or replacement without requiring a process shutdown and possible drainage of the pipe or vessel.
Thermowells protect sensors from damage caused by challenging process conditions, including extreme temperatures, high pressures, corrosive substances, and flow-induced stress.
When a thermowell is in a pipe, the forces acting on it by the process conditions can result in the thermowell compromising its structural integrity (bending, cracking or a complete shearing of the thermowell stem). Since the thermowell is a pressure retaining and process containing instrument, any failure can result in process leakage, equipment damage, and potential personnel injuries. Thermowell calculations are performed to prevent these unwanted situations from occurring and to ensure that the thermowell will meet and withstand all the process conditions it will experience in a given application.
Emerson’s Rosemount Thermowell Design Accelerator software provides all you need to design, troubleshoot, and evaluate a thermowell to make sure it is safe for your process. It performs thermowell calculations, suggests instrumentation that works, as well as guides designers through the entire process. It reduces the complexity of thermowell calculations by simplifying the process, automating the difficult aspects and providing solutions based on the need of the specific application. This in turn will drastically reduce the amount of time and effort spent on thermowell calculations and free up the designer to concentrate on other vital issues.