×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Magnet cryogenic vessel

Magnet cryogenic vessel

Magnet cryogenic vessel

(OP)
I am designing and building a magnet for a research facility. The vessel that encases the superconducting magnetic coils has had a preliminary design done. The vessel will use 316N or 316LN because of the increase in strength at cryogenic temperature. The vessel is to be designed in the "spirit" of the BPVC while not actually having to be a code stamped vessel. An allowance has been made to applying the material safety factors to the cryogenic strength of the material as being acceptable. This is because the magnetic loads cannot exist above a temp. of 10K. The magnetic loads are 80% of the design load. Otherwise the vessel must meet BPVC for the max. helium pressure. The vessel is a strange plate structure designed around many space limiting constraints. It is a welded vessel and should be welded according to proper procedures. It is being designed to Div 2 design by analysis as much as possible.

I am looking for persons that could aid in guiding proper design for this vessel. The vessel size is small, 2 ft tall x 2 ft wide x 4 ft long approx. There has been static FEA done on the initial design. I have had little exposure to the code but have read and understand it enough to know I need an experienced person to help apply it properly. The analysis and engineering design needs to be done over a 4 month period, being finished by Jan 2011.

RE: Magnet cryogenic vessel

I think you'd be best served to contact an engineering firm and hire an expert for this rather than hoping somebody on an open public forum claims to have this special knowledge.

RE: Magnet cryogenic vessel

(OP)
I have been designing and building these devices for over 20 years and have built over 50 such devices, but do so in a lab not subject to BPVC. This was not posted 'hoping' to to find somebody. I already know the device will work as designed, but the lab that the device is being built for requires best effort to code. The project will get consulting help, this is just one avenue being taken to find a it. There are some good threads in here that have been responded to by very knowledgable people. I am only trying this in addition to other places I know to look. You never know who you might find. People know people. Many times you learn something at the same time from the posts.  

RE: Magnet cryogenic vessel

I do not doubt that you are very knowledgeable on this topic.  It also appears that you need some very specialized experience on a very specific topic.  If I were in that situation I would be hesitant to take very seriously information from this forum as a reliable source to certify that your design is "best effort to code" as you state.  If that is the case then it sounds like you are an expert and you would be qualified to make this designation.

RE: Magnet cryogenic vessel

Two outfits that have very good mechanical engineers extremely well-versed in BPVC design-by-analysis:

Becht Engineering: www.becht.com
Equity Engineering: www.equityeng.com

You're very smart to know that this is out of your area of expertise.  Wish there were more like you.

RE: Magnet cryogenic vessel

American Exchanger Services has experience with such Code work.  They have even used explosive forming to achieve difficult geometry with minimal welding.
http://www.amexservices.com/

= = = = = = = = = = = = = = = = = = = =
Plymouth Tube

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources