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B31.3 Unlisted Component

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uscme1997

Mechanical
Jun 19, 2008
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I know that B31.3 excludes instruments. But I have a question regarding thermowells - unlisted component or not? What say you?

Thanks,
Tony
 
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Refer to ASME B31.3 2014 para 306.6, which refers to ASME PTC 19.3 TW. PTC 19.3 TW has its restrictions, which are listed in table 4-1-1 of the respective standard.
 
Let me add another condition....I am working to an earlier edition of B31.3. Sorry that tidbit was not originally included.
 
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