How can corrosion alter the accuracy and precision of a C-
Bourdon tube pressure gauge?
Answer / carl_ellis
The issue with corrosion of a bourdon tube is not accuracy,
it's safety.
Corrosion failure of a bourdon tube occurs when the elastic
element (Bourdon tube) has been weakened .
The potential corrosion hazard is leakage of the process
fluid, which may be hot, toxic or corrosive, from a
measuring instrument, process pipe or tank. The other
corrosion hazard is catastrophic failure of the bourdon
tube, and the release of energy that can approach that of a
shot from a firearm.
Those failures due to corrosion dwarf the effect of
corrosion on accuracy. A change in the bourdon tube
stiffness effects gauge accuracy whether that change comes
from temperature, corrosion, or overpressure. The
likelihood that corrosion will destroy the bourdon tube
result in the ultimate certainty of "uncertainty" - total
non-accuracy due to failure to operate.
Whoever wrote this question missed the point entirely about
corrosion effects on pressure elements in piping.
The question should be, "How can corrosion alter the safety
of bourdon tube pressure gauge?"
Carl Ellis
Measure First
Is This Answer Correct ? | 1 Yes | 0 No |
please send me hpcl placement papers
what is the daily job of an instrument commissioning supervisor
What is surge in compressors? How to detect and control it?
WHY WE R NOT USING THE TURBINE FLOW METER IN THE STREAM SERVICE ? pl explain?
Explain why use mmwc unit?
Why ac supply load cell is used? Can we use the dc supply load cell?
Explain about safety integrated level protection? . How it was differ from other protections ?
What is the live zero and dead zero
.how does CSADA systems display the process variable value?
how to calculate orifice sizing? and tell me if pipe size bet 50mm t0 200mm then we can use pipe flange??? and above 250mm pipe size should i use D & D/2 Flange? is it right or wrong?
wich is coming the first HAZOP OR SIL
how the 4 to 20 mA signal goes to any controller/indicator,and what is the role of voltage ,12/24 and how to do connection of it, in controller.