Results 1 to 6 of 6

Thread: What does vapor proof mean when discussing light fittings.

  1. #1
    Join Date
    Dec 2013
    Location
    Ireland
    Posts
    4

    What does vapor proof mean when discussing light fittings.

    Greetings from Ireland.
    I have just passed the aee.org CEM exams and have my first relamping project.
    I am a Chartered Engineer and have been a PE in Canada.
    I am familiar with IP ratings as well as many of the different codes
    I have read most of the posts here on Haz environments so have a grasp of the Classes/Divisions/Groups
    The specs I am getting for the replacement luminaries say the fittings are say, IP 66 vapor proof.
    My question is:
    Is there a vapor proof spec somewhere?
    Or am I missing something?
    Thanks.

  2. #2
    Join Date
    Feb 2003
    Location
    Massachusetts
    Posts
    60,020
    Vapor proof means sealed.

    Check out the images at this google link https://www.google.com/search?q=vapo...w=1024&bih=672

  3. #3
    Join Date
    Dec 2013
    Location
    Ireland
    Posts
    4
    Thanks.
    Are they sealed to any standard?

    For example if the client asks 'how well' are they sealed I can hardly 'duck' the question?

  4. #4
    Join Date
    Dec 2012
    Location
    Placerville, CA, USA
    Posts
    18,167
    Quote Originally Posted by Carlow52 View Post
    Thanks.
    Are they sealed to any standard?

    For example if the client asks 'how well' are they sealed I can hardly 'duck' the question?
    This link suggests that IP designations are defined in a European standard, but I have not idea how you would get a copy. I also do not see a mention of vapor proof in the short reference to IP 66.
    A common language synonym would be hermetically sealed or gas tight. But without a specification of the pressure it would have to withstand, it is not a complete definition.

    For large molecular weight substances composing the vapor, the seal would not have to be as perfect as for low molecular weight (small) gas molecules.
    Last edited by GoldDigger; 12-18-13 at 07:42 PM.

  5. #5
    Join Date
    Dec 2013
    Location
    Ireland
    Posts
    4
    GD: You have hit the nail on the head here with the IP reference.
    This is exactly my dilemma and hence this post.

    I have luminaries rated as IP 54 up to IP 68 all of which are 'vapor proof'.
    Some are well made in Germany with good seals with quality O rings.
    Others are less well made around 100 degrees East

  6. #6
    Join Date
    Dec 2013
    Location
    Ireland
    Posts
    4
    Just to add that I got the following information elsewhere:

    A vapour proof fitting corresponds to a sealed fitting rated to minimum IP65 and corrosion proof.

    There is a process where the words vapor proof are being discontinued in the literature.


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •