Temperature Sensing Equipment by Daily Thermetrics

Factory-direct, designed and manufactured to meet your needs

Daily Thermetrics Corp. ("DTC") designs and manufactures all of the thermowells you buy from us. This is important because DTC maintains an extensive inventory of barstock (such as 300 series stainless, 400 series, Inconel, Hastelloy, Monel, etc.), thus enabling us to meet the rush delivery requirements often expected by the industry. DTC offers full traceability of all of its thermowells using serial numbers that are unique to each thermowell (This is in addition to standard tagging requirements). Ultrasonic testing of all full penetration welds is provided to ensure utmost integrity of workmanship.

Available Thermowell Types

Daily Thermetrics offers the most complete line of thermowells.
Our thermowell offerings include:
• Screw-in
• Flanged
• Van Stone
• Socket Weld
• Weld-in
• Special Bore Sizes
• Special Lag Lengths
• Retractable Thermowells
• Velocity Collars

Proper Thermowell Design

We highly recommend performing thermowell vibration calculations for every thermowell, especially for new applications and for applications in which the dynamics of process flow have changed.
At your request, Daily Thermetrics will perform thermowell vibration calculations to ensure proper thermowell design. Furthermore, we can recommend the proper design solution to overcome a high velocity issue.

Proper thermowell design is a very important topic, especially to those who have experienced thermowell failure out in the field due to stress and vibrations resulting from improper thermowell design. Thermowell failure can cost the end user hundreds of thousands of dollars in lost production time. Moreover, the legal implications involved in such an event are both time consuming and costly. It is much less costly to properly design a thermowell up-front using the proper tools (thermowell vibration calculations).

The ASME Performance Test Code (ASME PTC 19.3) has been adopted by many in the industry as the standard method of vibration calculations for use in designing thermowells. However, there is an inherent shortfall with the ASME PTC method. The ASME PTC does not take into account the properties of the actual process. In other words, the ASME Performance Test Code assumes that crude oil has the same effect on the thermowell as, say, ethylene! There is simply no input for the properties of the process fluid when using the ASME PTC. (Unfortunately, the ASME PTC assumes steam as being the process regardless of the application.)

Daily Thermetrics has been designing and manufacturing thermowells since 1973, and we have realized that the ASME PTC should only be used as a guideline when properly designing thermowells. The most reliable method, developed by John E. Brock for the U.S. government, does take into account the properties of the process in each application. We have seen many instances where a thermowell "properly" designed by using the ASME PTC fails the vibration calculations set forth by J.E. Brock (using the actual properties of the process)! As a general rule, therefore, our philosophy at Daily Thermetrics is to recommend a thermowell design which simultaneously passes the criteria of BOTH the ASME PTC method AND the J.E. Brock method.


Thermowell Traceability

A very important feature we offer (free of charge with every order) is 100% full traceability for every thermowell manufactured by Daily Thermetrics. We do this using a unique serial number etched onto each thermowell. Also etched onto each thermowell we manufacture is our company name and telephone number. This allows the end user to know who manufactured it, and using the serial number, we can tell you when you ordered it, what the part number is, who welded it, who inspected it, and, more importantly, we can provide material certs for the thermowell (and flange) by using the serial number. The thermowells we manufacture are therefore fully traced, both in the labor aspect, as well as the material aspect of each.

Remember: Currently, the industry uses only tag numbers to identify a thermowell. However, the tag number never changes, no matter how frequently the thermowell is replaced with a new one. Having a unique serial number for each thermowell ensures vendor accountability for each and every thermowell.

Thermowell Catalog

To ensure the best possible welds, all full penetration welds at Daily Thermetrics are ultrasonically tested, exceeding the industry standard dye pen test. Additional NDE options such as hydrotesting and radiographic analysis are also available.

We encourage you to challenge our engineers to design a custom thermowell for your specific application.

A variety of different coating options are available, including, but not limited to:
stellite, teflon, and CFS.