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  • Users: BenjaminM
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  1. BenjaminM

    Optimal Steam Pressure for Jacket

    I am trying to decide how to go about determining the optimal steam pressure for a reactor jacket. For the sake of argument, I'll just say we're heating water. The jacket is rated for 150 psig, and we have somewhere around 145 psig steam available. Historically we'd stick a 50 psi regulator in...
  2. BenjaminM

    Keyed Hose Connectors

    I am looking for a hose connector which can be keyed to prevent connecting to the wrong tank. What I am looking for is very similar to a standard cam & grove fitting, except for the male plug has a few pins in place which can only mate with a female socket with grooves for those pins. I had a...
  3. BenjaminM

    Turn Overs / Day For UV Sterilization of Water Tank

    We have a de-ionized water tank in operation in which we have experienced issues with algae growth. The line feeding the tank is treated with a ultraviolet sterilization system. After testing immediately before and after the UV system it appears to be working very well. However once the water...
  4. BenjaminM

    Continued Education / Training / Life Long Learning

    A topic I heard a good bit about while I was in school was "life long learning". In a recent employee evaluation the comment was made that I needed to consider taking classes in topics I was interested in. I routinely find myself researching / studying / reading to figure out problems. But...
  5. BenjaminM

    Rate Equation for Heating Vessel

    I am trying to develop a model for the change in temperature of an agitated tank with a steam jacket with time. In section 5.2 of Transport Processes and Unit Operations by Geankoplis, there is an equation (5.2-3) which describes the change of temperature of a solid object with time (eg...
  6. BenjaminM

    Concrete Thickness for Mix Tank on Load Cells

    We've got a small 600 gallon mix tank on load cells. When a forklift drives near the tank, the load cells deviate wildly, swinging 50 pounds or more. We've taken a core drill and sampled the concrete next to the tank. It's roughly 6" thick. I should imagine the question of how thick concrete...
  7. BenjaminM

    Sizing Vacuum Pump for Batch Distillation

    We've got several processes which we perform vacuum distillation on a batch basis to remove solvents. In some cases we use Nash liquid ring, they are real work horses. In other cases it is a smaller Kinney vacuum pump. I'd like to develop reasonable justification for what vacuum pump we use...
  8. BenjaminM

    Delta T for Steam on Heat Exchanger

    Good morning, I'm looking at heating water using a heat exchanger with steam. I have dozens of examples of sizing heat exchangers with liquids on both sides, but I have not found any references to using steam on one side. I know how much heat is in a pound of steam. I have estimates of...
  9. BenjaminM

    Raoult's Law / Psychrometric Charts / Humidity

    I've got what I would have thought would be a fairly simple problem, and I am trying not to over complicate it. I've got a tank half full of water at 80*C. I've got an air line blowing through the reactor at some flow rate, and I am trying to make an estimate of how much water is evaporating. I...
  10. BenjaminM

    Batch Sheets and Operating Procedures

    The company I work for has a few different locations. The site where I reside falls under the Process Safety Management regulations, our other locations do not. At my location we have developed written operating procedures, and we have modeled them directly around the requirements listed in...
  11. BenjaminM

    Mixing Storage Tank By Circulation

    We have a storage tank for a finished product. We may mix a couple of different batches in the tank. We circulate the tank with a pump to make sure the different lots are homogeneous before samplings or packing out to tank trucks. Our production manager wants to circulate the tank for a hour...
  12. BenjaminM

    Triflic Acid Compatible Materials of Construction (Or Information on Full 316L S/S Safety Valve)

    I am looking for chemical compatibility information for Triflic Acid. I have an old handling guide which states to use only 316L S/S and Teflon. It goes further to state Hastelloy C has similar chemical resistance to 316L S/S. We are relatively certain Kalrez is functional. Triflic Acid is not...
  13. BenjaminM

    Most Basic Guide To Structural Design

    Over the last decade I've seen various platforms, or pipe racks or stands or mezzanines which were more or less hobbled together by maintenance departments. In some cases the result appears to be way undersized and in other cases extremely over sized. Most of the time the structure in question...
  14. BenjaminM

    Grounding Non-Flammable Materials and Static from Totes

    Good afternoon, I have two static related questions. First, we have two different locations at our site where we unload flammable materials from tank trucks to bulk storage. At each of these locations we have static grounding indicator stations. We have a third location where we unload 50%...
  15. BenjaminM

    Organic Vapor Concentration In Head Space of Tank

    My command of thermodynamics has failed me and I am almost embarrassed to ask, but after a few hours of banging my head I figured I'd ask for help. I am simply trying to estimate the concentration of an organic vapor (CS2 in this case) in the head space of a nitrogen inerted tank at atmospheric...
  16. BenjaminM

    Any Suggestions for CMMS?

    We are a small to medium size company, about 100 employees across 3 facilities. At my location we have a maintenance database which was created by a contractor. The system works great, we have equipment profiles, can set up preventative maintenance, record reactive maintenance, look at equipment...
  17. BenjaminM

    Non-Destructive Identification of Stainless Alloys

    For the most part our reactors and tanks are 316L stainless. Most of the piping we have on site is 316 with some amount of 304 mixed in. We are wanting to work back through and identify what is 304 and what is 316. Is there any easy means for testing where the piping and fittings are not...
  18. BenjaminM

    Opinions and Suggestions for CMMS Programs 2016

    Good morning. We are currently using a CMMS database which we had custom made by a local contractor. I absolutely love the software, but the contractor is in declining health and getting ready to retire. We are wanting to look at a commercially available CMMS program to handle our maintenance...
  19. BenjaminM

    Anyone Experienced With Autodesk Plant 3D?

    I've watched multiple Youtube videos on what Plant 3D is capable of and I am considering purchasing the package. I do create P&ID's on a regular basis, and work on equipment layouts. I can see quite a bit of value which I could gain from it. I've been slowly trying to learn the software by...
  20. BenjaminM

    Chemical Compatibility Reference Book?

    I'd like to get my hands on a decent reference book for chemical compatibility of various materials. I have a copy of Pressure Vessel Handbook and also a pretty handy compatibility guide from Chesterton seals. In addition I am aware of Colepalmer.com has a decent compatibility database...

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