Moreten,
That is exactly the point. The process engineer must review all possible cases, and make the determination of the worst case. Most vendors don't even want to by liable for your inability to identify a potential runaway reaction scenerio that could have the potential to far surpass...
Hi Paul,
I would start by saying that the sizing of the relief is a very serious undertaking, and any sizing that you do should be confirmed with someone who has the experience that you currently do not have. The point to remember is that it is a life safety device and you should always treat...
FXM,
I am in agreement with sshep, because it would be an "atomospheric" tank, it would typically be governed by API 2000 (you should review this and determine if your situation is covered by this code). I think the only advice that I would provide you that has not already been covered here...
Hi,
The pressure relief valve could be blowing by, but it almost sounds as if there is an air bubble in your hydraulic system. If you see any jerky movement in it's operation, that is a good indication.
The pressure relief valve as you posed the question, could be causing the issue, if...
Hi,
You really should started with the foundation, which would be the NEC (National Electrical Code). The NEC defines the various hazard classes and their application. I'm not sure if you posted in an Electrical Engineering forum, but that would be a place to ask the same question. The...
Zoobie,
My mistake on the pilot for the gas service, I suggested it because I thought that it might pass, but given the natural gas....
However, what is the desire for the piloted relief? Bubble tight shut off and the ability to run very close to the systems set pressure (i.e. 95%)? Then...
Zoobie,
What's the application? (Process, Steam, chilled water, etc)? Standard question, right?
Now, I would typically use a series 2700 by Farris, which is an ASME code rated valve, and it comes as small as 1/2" screwed. I have also purchased them as 3/4" x 1" flanged. I have also...
Exactly Zoobie. The "Design Pressure" and "Operating Pressure" are two different numbers here, and they both can not be 3200 psig. Check with the pump manufacturer to find the maximum allowable working pressure (stated as if it was a vessel to make a point), because if the discharge pressure...
The set pressure and the discharge pressure are the same? You need to look at your system, and identify the weakest link, and the allowable working pressure is the set pressure. I would expect that the pumps maximum allowable pressure is much greater than 3200psi? I think that you will see my...
Yes, even a brief description of the "system", what are you feeding with the pump (pressurized tank or a distillation column), line sizes, flowrates, pressures, etc... As much info as you can provide, including any sizing critera for the pump and the line sizes that you may have performed...
After talking to the manufacturer, they have no issues orienting the valve in any orientation. Their primary concern would appear to be the solvent and the o-ring... Any changes to the o-ring via swelling or distoring will cause failure (to open or seal). Also, these types of valves do not...
I agree with sshep in that a Nitrogen purge is a good start, but you may not be able to accomedate this type of operation. What exactly would be the problem with installing it in the horizontal? I have used these types of reliefs in all sorts of orientations and have not had any issues. It...
Raingal79,
Hi. Just a quick note on what I have used successfully in some of my previous projects. The key is not to calculate whether or not a relief is required, but merely to prove that the relieving capacity is going to be adequate. For the thermal expansion, we almost (there was one...
Hi,
I hope that this helps. The FDA uses and refers to the applicable CFR's for the manufacture of food and drugs, Title 21. The applicability and safety of a product contact material is covered by a number of different sections, and it is based upon the type of material. Please use the...
BSG,
I too have worked on and design several API facilities in the US and in PR. There are only a few items that I did not not see in your original message.
One, we would typically avoid the exterior cooridor arrangement, but if required we would create some special blast rated walls to...
