Instrument Required Temperature Rating
Instrument Required Temperature Rating
(OP)
Given: A vessel mechanical design 500-psig at 650-F.
Question: Does the instrumentation temperature rating have to match 650-F ??
In real life, the maximum fluid temperature is 350-F.
I am inclined to add a 50-F margin and specify instruments at 400-F.
In this case the instrument is a level transmitter.
The Client questions the lower temperature specification but would rather not pay the extra cost for a higher rating.
What is correct ??
Question: Does the instrumentation temperature rating have to match 650-F ??
In real life, the maximum fluid temperature is 350-F.
I am inclined to add a 50-F margin and specify instruments at 400-F.
In this case the instrument is a level transmitter.
The Client questions the lower temperature specification but would rather not pay the extra cost for a higher rating.
What is correct ??





RE: Instrument Required Temperature Rating
RE: Instrument Required Temperature Rating
In miltary specifications, there is a normal operating temperature range, say, -35°C to +50°C, and there is a survival max temp of 71°C. So, you need to discuss with your customer what abnormal temperatures there might be, and what your instrumentation needs to do about that. If it fails after such an event, who pay for the replacement?
TTFN
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