Joined: May 30, 2010
Posts: 11
Location: Illinois, USA
Status: Offline
Posted:
Nov 04, 2011 - 10:05 PM
Post subject: no wet legs for DP steam flow transmitters?
I'm an old guy and for decades, the prescribed method of DP transmitter mounting on a steam line has been BELOW the steam line with water filled wet legs to protect the transmitter from the steam heat.
Rosemount just re-wrote the rules (for certain conditions).
The way I heard the story is that someone at Emerson ran across a DP transmitter installed above the steam line, not below, obviously with no wet legs, with just a coplanar manifold valve assembly on the top of an averaging pitot tube. It had been running for about a year, with no apparent damage.
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