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opening valves

Discussion in 'Tanker, Bulk and Dump Trucking Forum' started by realsupatrucka, Apr 11, 2014.

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  1. Apr 11, 2014 #1
    realsupatrucka

    realsupatrucka Road Train Member

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    Qc policy is they open external valve before internal valve....but other companies open internal then external. ..do you know why they would do it like this
     
    realsupatrucka, Apr 11, 2014
    realsupatrucka, Apr 11, 2014
    #1
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  3. Apr 11, 2014 #2
    chalupa

    chalupa Road Train Member

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    To each his own policy....never made a diff to me. Only diff is product is inbound to trailer and internal is north of pump and spring loaded SO I use closed internal to clean out lines and keep product in trailer.

    QC's way allows you to check integrity of external so possible point there but that's miniscule IMO.

    Dunno, some strange birds in the tanker business IMO.....
     
    chalupa, Apr 11, 2014
    chalupa, Apr 11, 2014
    #2
  4. Apr 11, 2014 #3
    realsupatrucka

    realsupatrucka Road Train Member

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    I mean I can see contamination if the gasket is dirty or has left over product on it...but I cant wrap my head around it...I guess the whole load a be contaminated if u opened external first
     
    realsupatrucka, Apr 11, 2014
    realsupatrucka, Apr 11, 2014
    #3
  5. Apr 12, 2014 #4
    david123abc

    david123abc Heavy Load Member

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    Augusta, GA
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    I open the internal and then slowly open the external while checking for leaks. I don't really think it makes a difference how you do it, just so long as you do it the same way every time.

    As for contaminations, if it isn't caught in the initial analysis, I doubt it would be caught until well after you unload, unless it does something drastic to the tank.
     
    david123abc, Apr 12, 2014
    david123abc, Apr 12, 2014
    #4
  7. Apr 12, 2014 #5
    realsupatrucka

    realsupatrucka Road Train Member

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    I understand. ..I guess its just they way of doing they unload procedures. .have to do it they way
     
    realsupatrucka, Apr 12, 2014
    realsupatrucka, Apr 12, 2014
    #5
  8. Apr 12, 2014 #6
    Chinatown

    Chinatown Road Train Member

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    Same here; that's the way I do it.
     
    Chinatown, Apr 12, 2014
    Chinatown, Apr 12, 2014
    #6
  9. Apr 12, 2014 #7
    Allan Decker

    Allan Decker Bobtail Member

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    montz, la
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    I open internal first, I feel I have more control of the flow opening external last.
     
    Allan Decker, Apr 12, 2014
    Allan Decker, Apr 12, 2014
    #7
    realsupatrucka Thanks this.
  10. Apr 12, 2014 #8
    wsyrob

    wsyrob Trucker Forum STAFF Staff Member

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    It depends on what I am doing. If pulling a sample you have to open the internal first. I check the external connections before opening the internal. That wing nut that holds the whole valve needs to be tight. I also find the nut connecting the shaft is often loose when I pick up trailers at tank washes.

    When a tank is under pressure and all the hoses are hooked up I will crack the external just a little and open the internal. When I see the hose fill up and no leaks I open it all the way up. That way you are not putting the entire pressure of the tank on the valve. You are also not standing in front of the valve and can close it faster from the internal hydraulic jack.

    Hearing about a driver having to be air lifted from a paper mill while unloading caustic gave me pause. The nut holding the shaft was loose and product hit him in the chest when it popped loose while he was opening the valve. My logic is the less pressure you require that valve to hold the better. Maybe that is what QC is thinking.
     
    wsyrob, Apr 12, 2014
    wsyrob, Apr 12, 2014
    #8
    realsupatrucka Thanks this.
  11. Apr 12, 2014 #9
    realsupatrucka

    realsupatrucka Road Train Member

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    Yea I take the wing nut off and check the gaskets and contamination before I pick the trailer up if its empty....if its loaded I dont mess with it...im still trying to learn the difference between gaskets I need for certain loads....im learning as I go...I pretty much got all my fittings down....I usally crack the internal valve just a lil and the internal valve and look for leaks and if its not leaking I open the internal valve all the way then external....

    WHEN THE WIND IS BLOWING HARD HOW DO YALL STOP THE PRODUCT FROM DRIPPING ON THE GROUND


     
    realsupatrucka, Apr 12, 2014
    realsupatrucka, Apr 12, 2014
    #9
  12. Apr 12, 2014 #10
    david123abc

    david123abc Heavy Load Member

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    Augusta, GA
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    That's why I don't stand behind the valve when I open it. It probably wouldn't matter where I was if it let go, but in my little pea sized mind, I feel safer standing to the side while opening the external.
     
    david123abc, Apr 12, 2014
    david123abc, Apr 12, 2014
    #10
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