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Good information. Thank you! -Mike

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...

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...

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...

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...

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

Joerd, Works like a charm. Thanks. -Mike

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...

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...

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...

Mogens, Good information. Thanks. -Mike

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...

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

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

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...

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...

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

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...

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...

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...