• Welcome to ScubaBoard


  1. Welcome to ScubaBoard, the world's largest scuba diving community. Registration is not required to read the forums, but we encourage you to join. Joining has its benefits and enables you to participate in the discussions.

    Benefits of registering include

    • Ability to post and comment on topics and discussions.
    • A Free photo gallery to share your dive photos with the world.
    • You can make this box go away

    Joining is quick and easy. Login or Register now by clicking on the button

Is there a >3,000 psi compressed air piping system?

Discussion in 'Compressors, Boosters & Blending Systems' started by Father, Mar 17, 2021.

  1. Father

    Father Instructor, Scuba

    # of Dives: 500 - 999
    Location: Kwajalein Atoll, Marshall Islands
    355
    65
    Something like this but capable of running the pressure needed to fill scuba tanks?

    My club has a tank house with ~400 tanks. A system where the tanks could be filled on the storage racks would be ideal.

    I know one option would be just having a long hose, maybe on a retractable reel, with a manifold attached to run 4 fill whips is one option.

    Just wondering if something has ever been done where a room is piped/plumbed with QD outlets where a whip manifold could be hooked up to different areas rather than dragging a longer hose around.

    I assume it could be done using something like these since they're rated to 3,000 psi? It looks like they're made for metal lines though. Or maybe something like this?

    Hose-and-regulator.jpg

    20923_1_400x400.jpg

    I assume the plumbing would have to be heavy duty hose which could get expensive unless metal plumbing could be used? If so what kind would be used?
     
  2. runsongas

    runsongas Contributor

    # of Dives: 500 - 999
    Location: California - Bay Area
    4,627
    2,219
    plumbing a few hookups around the room and then a moveable cart with a manifold and fill whips is probably the easiest option.
     
    Father likes this.
  3. Wookie

    Wookie Curmudgeon Apprentice ScubaBoard Business Sponsor ScubaBoard Supporter

    37,144
    65,220
    1/4” stainless tube is the industry standard. Make sure the wall is at least .035 for safety. Buy lots of swagelok fittings unless you have a flaring machine available to you.
     
  4. Father

    Father Instructor, Scuba

    # of Dives: 500 - 999
    Location: Kwajalein Atoll, Marshall Islands
    355
    65
    Any suggestions for sourcing the hardware for something like this?
     
  5. Tracy

    Tracy Tech Instructor / Captain ScubaBoard Supporter

    # of Dives: I just don't log dives
    Location: Livonia, MI
    635
    353
    Mcmaster car sells the jic fitting, jic nuts and sleeves. They also sell the parker ST quick connects. You can get the flaring tool from Ridgid, you need a 37degree JIC flaring tool.
    The 1/4 stainless tubing will need sourced wherever you are. You can get the shut off valves from any scuba supplier or from swagelok.
     
    Father likes this.
  6. Father

    Father Instructor, Scuba

    # of Dives: 500 - 999
    Location: Kwajalein Atoll, Marshall Islands
    355
    65
    Are there any safety concerns with using quick disconnects with that much pressure?
    I know popping a QD attachment on my pancake compressor is one thing... but that's at 110 psi. Would 30x that pressure be dangerous or do you just need to shut off the line and bleed/purge it first?
     
  7. tbone1004

    tbone1004 Technical Instructor ScubaBoard Supporter

    # of Dives: I'm a Fish!
    Location: Greenville, South Carolina, United States
    18,663
    11,122
    use the ones rated for pressure washers or the actual high pressure gas ones from Parker or Swagelok. Do NOT use standard air compressor QD's. Swagelok QF4's are the more common ones from companies like Bauer, Parkers tend to be cheaper and just as effective.
     
    Robbyg and Father like this.
  8. Wookie

    Wookie Curmudgeon Apprentice ScubaBoard Business Sponsor ScubaBoard Supporter

    37,144
    65,220
    You don’t connect or disconnect under pressure.
     
    RayfromTX and Robbyg like this.
  9. Wookie

    Wookie Curmudgeon Apprentice ScubaBoard Business Sponsor ScubaBoard Supporter

    37,144
    65,220
    I have never been successful flaring .035 wall with a hand flaring tool. I use a $6500 machine that flares #4 to #32 .035 wall. Does someone make a hand flares that will do that?
     
    RayfromTX and couv like this.
  10. Wookie

    Wookie Curmudgeon Apprentice ScubaBoard Business Sponsor ScubaBoard Supporter

    37,144
    65,220
    He is on Kwajalein. Nothing but great diving is sourced there.
     
    Father likes this.

Share This Page