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  1. Vidaman

    CO2 Cartridges and CE

    Good information. Thank you! -Mike
  2. Vidaman

    CO2 Cartridges and CE: Repost

    Hi All, I posted this in the Pressure Vessel group then realized this might be the better forum. I'm working on a project that involves the use of a 45g CO2 cartridge like you would use for a paintball gun or inflatable life preserver. We are going to sell the system which uses the cylinder...
  3. Vidaman

    CO2 Cartridges and CE

    Hi All, I'm working on a project that involves the use of a 45g CO2 cartridge like you would use for a paintball gun or inflatable life preserver. We are going to sell the system which uses the cylinder as a source of pressurized gas. My question is what EU Directive applies to such a...
  4. Vidaman

    ESD Concerns w/Plastic Enclosure

    jraef, Thanks for the quick reply. You've actually hit the nail on the head. I can't seem to get the voice of the customer with regard to which ESD direction they are most concerned. I could metalize the enclosure (the plastic is a PC/ABS blend that accepts plating) and make mods to provide...
  5. Vidaman

    ESD Concerns w/Plastic Enclosure

    Hello All, Pardon the intrusion from an ME here, but my company is currently working on a specialized solenoid valve controller that will packaged in a plastic case with aluminum front and rear panels. The front panel will be covered by a polyester membrane keypad. The product is powered by...
  6. Vidaman

    Mass Flow Rate

    This reminds me of my fluids prof in college that stated the Civil Engineering Continuity Equation as... Mass Out = Mass In - Mass Stuck in Pipe Regards, Vidaman
  7. Vidaman

    Modifying Chart Series Range

    Joerd, Works like a charm. Thanks. -Mike
  8. Vidaman

    Modifying Chart Series Range

    I have a chart where I would like to control the range of values to be plotted by changing the range value in a cell. That is, one time I may want to plot all 100 points of a series, next I might want only to plot 50 of them. Right now I manually adjust the series range by going into the...
  9. Vidaman

    Age Hardening of AN470AD (2117-T4) Rivets

    SparWeb, The rivet age hardening thing is something I heard in the builder forums I participate in, yet no one has ever provided hard evidence (which is why I came here). My guess is that it's a concept mistakenly applied from the days of icebox rivets. The rivets are AD's. The first thing I...
  10. Vidaman

    Age Hardening of AN470AD (2117-T4) Rivets

    Hello All, I'm building a kit plane that is taking longer than anticipated to complete. I have some AN470AD an AN426AD rivets that are over 4 years old. I have heard, but have been unsuccessful in confirming, that aluminum alloy 2117-T4 will age harden. My question is, if true, what is a...
  11. Vidaman

    Aseptic Fitting Standard

    Mogens, Good information. Thanks. -Mike
  12. Vidaman

    Aseptic Fitting Standard

    I am working on a valve for a pharmaceutical process application and I'm trying to find a design standard for a aseptic fitting seal. The ASME BPE describes a European Hygienic Fitting that looks ideal (Fig SD-2(a)). However, they do not reference a standard. It is basically an o-ring face...
  13. Vidaman

    Declaration of Conformity for SEP?

    A quick and hopefully easy question: Is a Declaration of Conformity required for a pressure vessel classified as SEP under the PED? Thanks, Mike
  14. Vidaman

    Food and Pharmaceutical Valve Requirements

    Thanks to everyone for the information. I certainly helps in geeting up to speed on the subject. Thanks to all for your input. -Mike
  15. Vidaman

    Food and Pharmaceutical Valve Requirements

    Are there any industry specifications/certifications for valves used in the food and pharmaceutical industries? We are looking at redesigning a couple of our valves for this industry and I've just started to review the industry's requirements. The FDA seems to provide no other guidelines other...
  16. Vidaman

    Food and Pharmaceutical Design Requirements

    Are there any industry specifications/certifications for valves used in the food and pharmaceutical industries? We are looking at redesigning a couple of our valves for this industry and I've just started to review the industry's requirements. The FDA seems to provide no other guidelines other...
  17. Vidaman

    Aluminum and Halogenated Hydrocarbons

    Reiser, Thanks for the info. I also received some detailed info from the Aluminum Association. The article they sent also stated that the reaction can be autocatalytic. Definitely not something to mess around with. Thanks again, -Mike
  18. Vidaman

    Aluminum and Halogenated Hydrocarbons

    I have noticed a common warning on certain types of equipment cautioning against using halogenated hydrocarbons with aluminum components, especially pressure equipment. What is the specific reaction that takes place between aluminum and halogentated hydrocarbons? The only thing I can imagine...
  19. Vidaman

    Hydrostatic Testing

    Are there any (ASME, EN, etc.) guidelines for failure testing of a pressure vessel? We have a couple small (1 & 5 liter), cast aluminum tanks with a bolt-on head for which I am currently writing a test spec. I'm struggling with what contitutes failure. The max operating pressure of each tank...
  20. Vidaman

    PED Question: Claiming Sound Engineering Practice

    Fawkes, I'm basically doing what you've outlined in your message. We are drafting our own test specification that will address all the key design points of the vessel using ASME and EN requirements as a framework where applicable. We are using the Hazard Assessment to guide development of...

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