As others have said - no. Acetic acid will remain in the suction piping, the pump itself, and the discharge piping.
If you're looking for a quick way to detect when the pump stops pumping, an ammeter can sometimes be a quick and dirty way (without having to tap in to the pipe).
Why do you think the valve's body would be electrified or electrically charged?
Is the valve automatically actuated? If so, everything should be rated for the area's electrical classification.
If it is a manual valve and it is electrically bonded to its inlet/outlet piping then there is no...
If you have a drill, it's possible. But possible is usually not the right question to ask. Without more details we don't really know if it's the right solution to your problem.
For example.. is your vessel from the vendor designed as a pressure vessel? If so, adding a nozzle may be unsafe...
Latexman is probably on to something. I used to use a highly accurate (and regularly calibrated) digital handheld manometer weekly to verify vacuum measurements from transmitters up and down a critical column. Readings from different instruments rarely matched.
How is vacuum measured? If dP...
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4" line is correct. I ran a quick calc and req'd ID is 3.9 inches for vertical self-venting flow.
Can you put the on/off valve in the horizontal section either at the top or bottom? I am concerned that the reduction in pipe size plus the valve in the vertical will disturb the annular...
Standard practice is an electric motor properly specified and installed for the area's hazardous classification. Using a combustion engine in a hazardous area seems like a recipe for disaster. You're guaranteeing an ignition source in the area if a leak occurs.
If the Salt Cooler is constructed and stamped to ASME VIII Div. 1 then the relief device needs to be per ASME VIII. In my opinion it's as simple as that. HRSGs are frequently stamped to ASME VIII, even though they are steam generators.
Your other questions are more about the relief design and...
A vendor furnished an ASME VIII heat exchanger on a hot water heating skid. Circulated water is heated by steam in the ASME VIII stamped plate and frame exchanger. Can the exchanger be protected by a Section IV T/P relief valve or does it require a valve stamped to Section VIII?
API 2000 Annex D explains the derivation and ultimately simplifies an equation for an ideal gas to convert actual to standard. See equation D.37, but make sure you fall within the assumptions laid out in D.9.2.6.
The potential disruptions to your moisture measurement really depends on the type of instrument you are using. From a quick google it looks like the RADWAG MA 50.R is a loss-in-weight device? i.e. heat it up and see how much weight your sample loses due to evaporation of volatiles?
If it is...
Density is a function of temperature and pressure. You are correct that you can use your steam table to get the density based on process conditions.
Velocity is only a function of flow rate and pipe size. Also - something seems off with your estimate of 200 m/s velocity. That would be...
elridyeng - that rule of thumb is actually for area, not simply the pipe diameter. So for instance if you have 3" outlet, 2" inlet, and 1" drain a 4" vent would be sufficient (even though 1+2+3 !< 4 obviously, the cross sectional area of 4" is greater than the areas of 1" + 2" + 3").
Your calculation of flow is giving you more of the maximum flow rate through your 150 mm pipe with only gravity flow. That will not necessarily be the actual demand from the building. I believe that number would be much lower!
With a quick check of Crane - you could hope to get about 55 L/s...
