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Critical frequency estimates for thermowells covered under ASME PTC 19.3 / David S. Bartran, Dean C. Ripple.

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Series Information

NISTIR ; 7407.

Record details

  • Physical Description: 1 online resource (7 pages).
  • Publisher: [Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and Technology, [2007]

Content descriptions

General Note:
"March 2007."
Contributed record: Metadata reviewed, not verified. Some fields updated by batch processes.
Title from page [1], viewed April 5, 2007.
Bibliography, etc. Note:
Includes bibliographical references (page 7).
Summary, etc.:
The ASME Performance Test Code, PTC 19.3, establishes the velocity ratings of thermowells in terms of a simplified resonant frequency estimate. The theoretical basis for this is examined and compared with discrete element methods. It is found that the code calculation fails to guarantee conservative velocity ratings for shorter thermowells. The implications of this finding and possible remedies are discussed.
Subject: Temperature measuring instruments.

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