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Been out of the loop for 4 years what is the situation with Carbon Fiber Tanks?

Discussion in 'General Scuba Equipment Discussions' started by Robbyg, Dec 31, 2020.

  1. Mod63

    Mod63 Dive Con

    # of Dives: 1,000 - 2,499
    Location: Home of the largest gathering of drunkards
    387
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    No such issues here, and they are used heavily in salt water.
    One question to clarify:
    Are we talking "pure" CF tanks like they are used by firefighters etc. or the Carbondive tanks, which are steel at the core and CF wrapped?
     
  2. tbone1004

    tbone1004 Technical Instructor ScubaBoard Supporter

    # of Dives: I'm a Fish!
    Location: Greenville, South Carolina, United States
    18,417
    10,746
    both apply, and unless you have $100k+ testing equipment you have no idea if it's an issue or not, but I guarantee that there are imperfections in the composite. I have done a lot of development work on pure composite and hybrid pressure vessel designs, it's there. You won't catch me using them.
     
    rjack321 likes this.
  3. rjack321

    rjack321 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Port Orchard, Washington State
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    have seen many pictures of smaller carbondive CCR cylinders which have clearly failed exactly as @tbone1004 has described

    don't expect them to last more than about 8 to 15 years max
     
  4. Martijn

    Martijn Instructor, Scuba

    # of Dives: 2,500 - 4,999
    Location: Bonaire
    95
    80
    Why? Plenty of regs that are rated and used for 300bar ...
     
    Pkishino likes this.
  5. Pkishino

    Pkishino Instructor, Scuba

    # of Dives: 200 - 499
    Location: Japan
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    Ultra light fill composite tanks from interspiro with unlimited service life are used quite a bit in the Swedish armed forces, both by disposal divers, working and attack divers.
     
  6. tbone1004

    tbone1004 Technical Instructor ScubaBoard Supporter

    # of Dives: I'm a Fish!
    Location: Greenville, South Carolina, United States
    18,417
    10,746
    They are, but it wears the HP seats out much faster. If you follow the manufacturers service interval it's not a problem

    They are not treated as unltd service life by the military
     
    rjack321 and Martijn like this.

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