What is the easiest way to satisfy this fire extinguishing requirement?

Discussion in 'Class Societies' started by ldigas, Jan 17, 2012.

  1. ldigas
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    ldigas Senior Member

    [GL 3-G-1.8.] Craft with a length of 15m or more are to be provided with a water fire extinguishing installation ...

    I never recall (on boats of just a bit above that size, say to 20m) seeing anything regarding fire extinguishing, apart from traditional CO2 bottles.

    How is this requirement usually satisfied? I mean, what is the easiest system to install that will satisfy that requirement?


    A plastic hose connected to a bilge pump? (guessing off the top of my head here)
     
  2. gonzo
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    gonzo Senior Member

    A plastic hose will not satisfy the requirement. A regular fire hose will. A bilge pump takes water from the bilge so will not work either. You need a high pressure, high volume pump connected to a through-hull fitting to supply it with water.
     
  3. ldigas
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    ldigas Senior Member

    I know, but this is a boat of 15.8m which has been lengthened from a 14.8m boat (don't ask). They used to have 2 CO2 bottles, and now the inspector is bugging them over that pump ("classification society inspector" <- is there a better term for this in english?).

    I don't even know where they could install it (space is limited) so that it could be reachable. That is why I'm asking for workarounds, so to put it.
    From what I read in the rules, a bilge pump can be used for this purpose (reversible, I guess?).
     
  4. gonzo
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    gonzo Senior Member

    A bilge pump won't probably have the pressure or volume to satisfy the rule. A temporary water pickup, like a hose off the side, may work.
     
  5. ldigas
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    ldigas Senior Member

    Sigh ... it looks the easiest way in the end will be to install a small pump after all.

    Hose off the side ... they have a rather large freeboard, I don't think the bilge pump would be able to "take it".

    Do you perhaps know what kind of pumps are installed for that purpose? I see nothing in the Vetus catalogue, under "fire protection pumps" or anything similar ("high pressure pumps" also nothing)?
     
  6. michael pierzga
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    michael pierzga Senior Member

    A Steimel type KB twin chamber centrifugal pump is widely used on yachts.. One chamber is used for raw water cooling the engine , one chamber is avaible for water pumping. Its a 3000 euro pump. Better get approval for fire fighting before purchase. Engine driven pumps for firefighting are poor seamanship. http://www.steimel.com/download/prospekte/pumpen_en.pdf
     
  7. ldigas
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    ldigas Senior Member

    I'm hoping for some cheaper solution. They already have everything on board (including the bilges); just missing this piece. Are there some small high pressure pumps available perhaps, that would be *just enough* to satisfy this?

    Do you know perhaps?
     
  8. Submarine Tom

    Submarine Tom Previous Member

    What about simply asking the inspector?

    -Tom
     
  9. ldigas
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    ldigas Senior Member

    The project's finished, even the reconstruction is almost finished ... aparently someone just overlooked this detail.

    I could ask the inspector, but I don't know the fella, and the boat is some 500km away ... I was just asked to think of some simple (read: cheap) solution/workaround around this, that would just satisfy this.
    I don't think the inspector will put much trouble on it, but he wants *something* to be there.
     
  10. michael pierzga
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    michael pierzga Senior Member

    The typical fire pump for a yacht is a small diesel engined portable. They are not cheap but they are what is required to make inspection.
     
  11. Stumble
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    Stumble Senior Member

    You might want to think about a dewatering pump like http://www.waterpumpsdirect.com/Champion-65525-Water-Pump/p6945.html I don't know what your flow rate requirements are, but this type of pump is also commonly carried for emergency bilge pumping, and can do double duty as a fire pump. It just depends on where you put the inlet hose.
     
  12. powerabout
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    powerabout Senior Member

    just get ABS or DNV class and you wont have to worry
     
  13. gonzo
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    gonzo Senior Member

    Dewatering pumps don't have enough head for a firefighting pump. We all want cheap, but there is minimum cost for every piece of equipment. What is the flow and pressure at what head you are required?
     
  14. hoytedow
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    hoytedow Carbon Based Life Form


  15. ldigas
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    ldigas Senior Member

    That looks like an okey solution; I'll recommend they try to find something like that. Probably could find a cheaper model in this part of the world, if they tried.

    @gonzo - couldn't say. Will return home for the weekend, and then look at the numbers. I'm on a trip right now, and don't have my work laptop with me (and I'm very happy about that :))
     
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