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New to tanker hauling--need advice on getting product out of the hose???

Discussion in 'Tanker, Bulk and Dump Trucking Forum' started by Johnny Mac, Jul 13, 2012.

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  1. Jul 13, 2012 #1
    Johnny Mac

    Johnny Mac Bobtail Member

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    Jul 13, 2012
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    Hello,
    I just started driving tanker. We haul chemicals like bleach, aqua ammonia, and caustics...and wouldn't ya know it...I've never pulled a tanker before. I believe the quote goes, "baptism by fire.":biggrin_2553: I pretty much have everything down but the end of the delivery. We air off the bleach and caustics and we pump off the aqua ammonia. My question is: when you are working the product out of your line do you close the customer's product valve before you turn your air off or after you turn your air off? I have one customer that you have to close their valve while holding your hose up in the air or product will drain back into your pump area and hose. I need some advice from someone who has been at this for awhile. I want to pull into the plant with little or no product left over!

    Thanks for the advice!
     
    Johnny Mac, Jul 13, 2012
    Johnny Mac, Jul 13, 2012
    #1
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  3. Jul 13, 2012 #2
    rhodey

    rhodey Bobtail Member

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    Nov 22, 2009
    New mexico
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    If it's aired off you will see the hose jump at the end also the pressure gauge will start falling. If its ok with the customer just let it completely bleed off the pressure then close your internal valve then the customer valve then lastly your external valve. There won't be any product left. Good luck and be safe.
     
    rhodey, Jul 13, 2012
    rhodey, Jul 13, 2012
    #2
  4. Jul 14, 2012 #3
    RickG

    RickG Road Train Member

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    Owensboro , KY
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    That only works if your customer's line stops at the top of the tank above the product . Some have their lines go to bottom of the tank and the pressure won't bleed off . You have to close the customer valve first . You should have a bleed off valve between your external valve and hose you can use to release pressure from the hose .
     
    RickG, Jul 14, 2012
    RickG, Jul 14, 2012
    #3
  5. Jul 14, 2012 #4
    Taildragon

    Taildragon Heavy Load Member

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    Jun 22, 2012
    Indiana
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    No company training for hazmat???
     
    Taildragon, Jul 14, 2012
    Taildragon, Jul 14, 2012
    #4
    ShootThis Thanks this.
  7. Jul 14, 2012 #5
    ShootThis

    ShootThis Medium Load Member

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    Jun 20, 2012
    Wondering Where I AM Again???
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    What I was thinking,sounds like they gave him the keys and said "Good Luck".
     
    ShootThis, Jul 14, 2012
    ShootThis, Jul 14, 2012
    #5
  8. Jul 14, 2012 #6
    rhodey

    rhodey Bobtail Member

    23
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    Nov 22, 2009
    New mexico
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    Ya I should of been more clear. Most of are bottom fills have check valves. Pretty scary sending a driver out with hazmat having never yanked a tank. I'm guessing after a :few slam dunks he was like wth.. lol
     
    rhodey, Jul 14, 2012
    rhodey, Jul 14, 2012
    #6
  9. Jul 15, 2012 #7
    wsyrob

    wsyrob Trucker Forum STAFF Staff Member

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    Winston Salem
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    1. Air unload into top of tank. Let all the air blow off the tank through the line if the customer gives you permission and the tank is not so full that it will splash out of the vent valves at the top. Beware of foaming products as this can make a big mess. If its not allowed close it when the hose jumps and vent the hoses with a plow down fitting. You can also clear out the hoses with air attached to the blow down fitting

    2. Air unload into bottom of tank. This is a little tricky. I always assume there is no check valve and ask the helper provided by the plant to close the plant valve at the same time I shut off the internal. If there is no helper, plant valve first then tank internal if the plant valve looks to be able to handle the pressure. If not live with some product in the hoses and shut down the tank internal first.

    3. Pump unloads into top of tank. To get the maximum product out of the hoses you can't be in a hurry. I usually walk the hoses a couple of times with the tank empty and the pump running. Then I shut down the internal and open up the blow down valve on the fitting. This lets clean air in behind the product rather than the constant drip you get from the tanker internal. Walk the hoses again then shut off the pump at the same time your helper shuts off the customer valve. Plants are required to provide us with a helper for pump unloads.

    4. Pump unloads into the bottom of tank. Same as above but be ready to live with lots of product in your hoses if there ism no check valve. You need to have the helper close the customer valve at the same time you shut off the pump after walking the hoses a few times. Never run the pump into a closed customer valve or you risk rupturing hoses.

    Like most things in trucking take your time, don't get into a hurry and think things through before opening and closing valves or starting and stopping pumps.
     
    wsyrob, Jul 15, 2012
    wsyrob, Jul 15, 2012
    #7
    shriner75, rhodey and lv gn Thank this.
  10. Jul 16, 2012 #8
    Johnny Mac

    Johnny Mac Bobtail Member

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    Jul 13, 2012
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    Thank you all for the helpful info especially wysrob. This is a big time learning experience right now. The one that gives me fits is the aqua ammonia pump load into a tank that is pretty tall...maybe 75 feet not really sure. The load goes up to the top of the tank but it's hard to keep product from falling back down at the end. I think the main problem is that their pipes are rather wide and don't get pressurized as much as u want them to. Well thanks again. I have another load this morning. Will let you all know how it goes.
     
    Johnny Mac, Jul 16, 2012
    Johnny Mac, Jul 16, 2012
    #8
  11. Jul 16, 2012 #9
    wsyrob

    wsyrob Trucker Forum STAFF Staff Member

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    Winston Salem
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    Give it plenty of time walking the hoses. I would probably treat that like unloading into the bottom of the tank. Have someone else close the customer valve a couple of seconds before you shut off the pump if you don't have air to blow the lines from a blow down fitting.
     
    wsyrob, Jul 16, 2012
    wsyrob, Jul 16, 2012
    #9
  12. Jul 17, 2012 #10
    wis bang

    wis bang Road Train Member

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    Jan 12, 2011
    Levittown, PA
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    Roper style gear pump or a Blackmere style vaine pump?

    With a gear pump you leave the pump running and close the trailer valve.

    Since aqua amonia isn't too thick and probably get's top loaded so you don;t want to let some drain off the walls and re-open the trailer to get that last bit.

    Remove the suction hose from the trailer outlet, hold the end up and let the end droop over onto the ground so you can make a loop, walk this loop and the product left in the suction hose will flow into the pump.

    As long as a gear type pump is running the product can't flow back into the suction line.

    Goose the throttle a few times to clear the discharge & signal the receiver to start closing his valve as you shut the pump down.
     
    wis bang, Jul 17, 2012
    wis bang, Jul 17, 2012
    #10
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