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  1. #1
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    Default Cold weather and LDH

    Anyone have experience with 5" in very cold weather for LDH relay?

    NE Iowa Jan 08 (-10F) very large fire depleted 2million gal storage in a few hours. Had to shift to draft from river for tanker shuttle. Shuttle was approx 10blocks each way. When broke down draft pumper found the couplings between sections of 6" PVC suction were constricted by ice that formed on the alum. ID down to size of pop/beer can. Draft pumper continuously operated and had 2-1/2" recirc/dumping in the river. Does not sound like anyone was recording flow but report is maintained 3000gpm for several hours (from multiple draft sites using every tanker in the area).

    Safer option vs tanker shuttle in severe weather (and ice) might be LDH relay. Anyone used 5" supply in -10F temp? The hose/couplings freeze on the inside? To point lost performance?


  2. #2
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    As long as the dihydrogen monoxide is in motion, you shouldn't have a problem. If you have a kerosene fueled "torpedo heater" available, you might use it to thaw out frozen couplings
    ‎"The education of a firefighter and the continued education of a firefighter is what makes "real" firefighters. Continuous skill development is the core of progressive firefighting. We learn by doing and doing it again and again, both on the training ground and the fireground."
    Lt. Ray McCormack, FDNY

  3. #3
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    Default Cold WX LDH ops

    We have used 5"LDH coupled 5"Storz in far northern MN since 1991 for both tanker/tender fills and LDH relays - sometimes at temps around minus 20-40 F.

    1. Always keep water moving - never stop flows. Oh, did I mention keep the water flowing as well?

    2. Storz grooves can clog up with ice at open connections when filling tanker/tenders - use anitifreeze water mix in 5gal bucket to clear the grooves. Just drop coupling and hose in bucket between fills. Keep a brush handy for cleaning crap out of the grooves too.

    3. Consider using cam lock fittings for tanker/tender fills.

    4. Portable heaters can be handy in some cases.

    5. Our older Angus hose has held up better than newer SnapTite in cold temps. Big aneurysm bubbles, splitting, etc.

    6. Use section of 3" hose coupled 2.5" adapted down at end of 5"LDH to connect to tanker/tenders - too difficult to move 5"LDH when loaded.

    7. Place cheap plastic tarps under connection points to help keep Storz grooves clean.

    8. Use Jumbo wye to waste water off to some unused area between tanker/tender fills and at any other time with no flow to fire ground.

    9. Begin LDH set up early in event so you can switch over from tanker/tender shuttle to LDH supply.

    10. Watch where you waste water because you will be making an ice rink with excess water.

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  4. #4
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    Default

    Quote Originally Posted by CaptainGonzo View Post
    As long as the dihydrogen monoxide is in motion, you shouldn't have a problem. If you have a kerosene fueled "torpedo heater" available, you might use it to thaw out frozen couplings
    Sounds right to me. But the connections draft lines collected severe surface ice (inside the suction lines).

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