Building a raft w/ pvc pipe?

Discussion in 'Boatbuilding' started by Aberamonli, Mar 12, 2004.

  1. BATAAN
    Joined: Apr 2010
    Posts: 1,614
    Likes: 99, Points: 0, Legacy Rep: 1151
    Location: USA

    BATAAN Senior Member

    Attached Files:

  2. harry cassin
    Joined: Jan 2012
    Posts: 48
    Likes: 1, Points: 0, Legacy Rep: 28
    Location: Brisbane

    harry cassin Old Salt

    Using PVC

    I have thought of using pvc many years ago to build a rubber ducky and even started collecting pvc to do this, i see no reason why pvc can't be used, even in a house boat construction for pontoons if you could strap enough together, but i also found out that this stuff is expensive,would be good to no a few plumbers.
    Check out and post in http://www.allcatamarans.com/ they also talk on home made boats etc you may find some more answers, I know theres a guy just down the road that welds the stuff and does a good job,he also weld all sought's of plastic. But at the end of the day i have not seen any pvc boats getting around,but i shall keep my eyes open for them.
     
  3. zambiadream
    Joined: Nov 2012
    Posts: 1
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: tete,Mozambique

    zambiadream New Member

    pontoon confusion

    I have read about the pipes etc etc.and get the point.
    My question is using 200l plastic drums sitting inside a steel frame which I have already.
    The rig is about 40feet x 10 feet for the Americans ,or 12m x 5m for the rest of us.
    I anticipate ten drums each side.
    Nor sure if its enough ,whether i need more or whether i must fill the drums up with bottles etc.

    I intend to cruise down the zambeze in mozambique as i am mad about crocs hippos etc.
    :?:
     
  4. Submarine Tom

    Submarine Tom Previous Member

    "I have read about the pipes etc etc.and get the point."

    If you are asking this question, I'm not sure you do get the point.

    200 litres = 200 kg of lift

    20 drums = 4000 kg of lift

    So your vessel must never exceed 1/3 of that if it is a cat design.

    You could bump up your safety factor by filling them with sealed bottles.

    Does that help?
     
  5. michael pierzga
    Joined: Dec 2008
    Posts: 4,862
    Likes: 115, Points: 0, Legacy Rep: 1180
    Location: spain

    michael pierzga Senior Member

    Dont know anything about PVC pipe boats , but I do see speedy fish farm workboats...cats...made of large diameter Polypropylene ? tubes. Big tubes, saw off flat at the transom and tapered like a torpedo at the bow. You might do some googling .
     
  6. MarkSail1
    Joined: Nov 2012
    Posts: 7
    Likes: 0, Points: 0, Legacy Rep: -12
    Location: Long Island NY

    MarkSail1 Junior Member

    To answer your question. Though I do not reccomend pvc pipe for flotation do to it's structiol weekness. a 4" id pcv pipe caped at both ends 8' long will hold about 70 lbs close to 90 but taken away the weight of the scd. 40 pvc.
     
  7. kazzer
    Joined: Jan 2013
    Posts: 13
    Likes: 0, Points: 0, Legacy Rep: 6
    Location: Fairport NY

    kazzer Junior Member

    To make a raft 4" wide @ 13' long
    Sch40 Green pipe

    12 x 4" diam - 851 lbs total displacement = 400 lbs safe
    8 x 6" diam - 1267 " " 600
    6 x 8" diam - 1700 " " 850

    Strapped together with stainless wire - wooden deck

    Most commercial rafts in China are about 25' long - so double these figures

    http://www.youtube.com/embed/HOyZhdmKD1I?list=UUigPzFy8orZHZIxBu9DWfqQ" frameborder="0"

    Or youtube - caswellsubs - Caswell Trip on the river rafts

    Want the motor too?
    http://www.caswellexpo.com/the-longtail-or-mud-motor.html

    Hope this helps
     
  8. El_Guero

    El_Guero Previous Member

    ROFL!
     
  9. 805gregg
    Joined: Apr 2010
    Posts: 57
    Likes: 1, Points: 0, Legacy Rep: 20
    Location: Ojai, Ca

    805gregg Junior Member

    PVC degrades in sunlight, try ABS
     
  10. kazzer
    Joined: Jan 2013
    Posts: 13
    Likes: 0, Points: 0, Legacy Rep: 6
    Location: Fairport NY

    kazzer Junior Member

    Who cares? How long will THAT take, and 90% of it is under cover anyway. You're looking for gremlins where its proven they don't exist.
     
  11. kazzer
    Joined: Jan 2013
    Posts: 13
    Likes: 0, Points: 0, Legacy Rep: 6
    Location: Fairport NY

    kazzer Junior Member

  12. BobR
    Joined: Apr 2013
    Posts: 7
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Georgia

    BobR Junior Member

    Clever. The bow could be a simple sheet of metal formed on a break to a v with a return too. Substitute for the front lashing. Only a second idea, nothing wrong with all pipe. Middle lashing under the plywood deck?
     
  13. Mr Efficiency
    Joined: Oct 2010
    Posts: 8,955
    Likes: 605, Points: 113, Legacy Rep: 702
    Location: Australia

    Mr Efficiency Senior Member

    Shouldn't be too hard to get UVPVC, about all they sell here.
     
  14. china
    Joined: May 2006
    Posts: 43
    Likes: 0, Points: 0, Legacy Rep: 9
    Location: london,essex and jamaica.

    china Junior Member

    I realy don't know why a lot of people wish to use PVC piping. Maybe it's because its a common material and they think it may be cheap.

    The fact is HDPE pipe is way stronger and not much more expensive. It's easy to weld at around 300 degrees F. Simple way if crimping the ends and making more streamline. Should last about 50 years and is UV resistant.

    Any thoughts?
     

  15. kazzer
    Joined: Jan 2013
    Posts: 13
    Likes: 0, Points: 0, Legacy Rep: 6
    Location: Fairport NY

    kazzer Junior Member

Loading...
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.