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  1. TSeener

    Sizing PSV

    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...
  2. TSeener

    Sizing PSV

    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...
  3. TSeener

    Storage tank breather vent

    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...
  4. TSeener

    Small pilot operated valves

    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...
  5. TSeener

    Ethanol Plant Hazardous Area

    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...
  6. TSeener

    Small pilot operated valves

    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...
  7. TSeener

    Small pilot operated valves

    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...
  8. TSeener

    How do you Purge a PSV, at the highest point in the line?

    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...
  9. TSeener

    How do you Purge a PSV, at the highest point in the line?

    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...
  10. TSeener

    How do you Purge a PSV, at the highest point in the line?

    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...
  11. TSeener

    How do you Purge a PSV, at the highest point in the line?

    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...
  12. TSeener

    How do you Purge a PSV, at the highest point in the line?

    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...
  13. TSeener

    Thermal Expansion in pipes

    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...
  14. TSeener

    Material Certificates for Commissioning

    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...
  15. TSeener

    Pressure Relief System in a Production module-Bulk Drug(API) Manufactu

    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...
  16. TSeener

    Project management software

    SFritten, Great question, but if you are using MS Project, you have the correct tool. MS Project is exactly what I use to track multiple projects with shared resources. You can create the individual project files and the create a Master Project file by using Insert - Project (in the...
  17. TSeener

    New comer question - what's next

    AugFlwer, I would almost suggest that you reflect on what you enjoy more, planning the work and developing the plan or executing the individual tasks. I my self enjoy the project management aspects versus the engineeirng, but you may be a little different. I am involved in consulting and...

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