CE: Through-hull fittings on aluminum boats

Discussion in 'Boat Design' started by Eric Sponberg, Apr 2, 2005.

  1. Eric Sponberg
    Joined: Dec 2001
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    Eric Sponberg Senior Member

    Now I would like some advice.

    I have recently heard that the EU will not allow Marelon through-hull fittings and seacocks on aluminum boats for CE certification. Is this true?

    If so, what do you folks in Europe do for through-hull fittings and seacocks on aluminum boats so as to qualify for CE certification?

    I can imagine that a pipe section welded to the hull would suffice for the through-hull pipe, but then you need a seacock. Do you have to use stainless steel? Certainly bronze is not acceptable because of galvanic corrosion, even if you were to isolate it from the pipe with an insulating spacer.

    Any advice would be appreciated.

    Eric
     
  2. D'ARTOIS
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    D'ARTOIS Senior Member

    Eric, I don't think this is true. If it is, - I check tomorrow - I let you know.
     
  3. CDBarry
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    CDBarry Senior Member

    Don't know about CE, but comm'l FV practice is either
    1) For small openings, to weld an half coupling to the hull or seachest, then thread in a sch 80 pipe as a waster piece, then an SS valve (Conbraco, usually). The pipe is easily replaced and acts as the sacrificial part and is attacked instead of the hull. A doubler or insert in the hull plate is a good idea as well.

    2) For larger openings, same idea, only with flanged fittings instead of threaded.
     
  4. Eric Sponberg
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    Eric Sponberg Senior Member

    D'Artois,

    Thanks, I'll await your findings. Chris, thank you too, that makes sense.

    Eric
     
  5. CDBarry
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    CDBarry Senior Member

    For a valves over 2" or so use a non-wafer (lugged) butterfly that meets leak tight requirements in fire service (doesn't require resilent material to not leak - see 46 CFR Sub F) to save weight.
     
  6. dougfrolich
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    dougfrolich Senior Member

    Last edited by a moderator: Aug 26, 2013
  7. Eric Sponberg
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    Eric Sponberg Senior Member

    Doug,

    Thanks a lot. I'll pass this on.

    Eric
     

  8. ABoatGuy
    Joined: Aug 2004
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    ABoatGuy Member

    Eric,

    I don't know if you have had the same experience, but I have noticed a lot of difference in the interpretation of the CE requirements between different notified bodies. It seems to be a work in progress and a lot of the time feels like shooting at a moving target. I'm sure (at least I hope) it will get better with time!

    Phil
     
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