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  1. #1
    Join Date
    Jun 2013
    Posts
    13

    Default Fertilizer tank Gift Horse

    I was given a 14'-6" diameter by 15' aluminum fertilizer tank. The local farm supply is becoming less farm and more suburb so they dropped custom chemical application and fertilizer for Weber grills and go carts (utv). I just had to get it home. So I did some math and figure it weighed 6000# and made a homemade lowboy out of a wagon axle and 4" square. I ran it down the state road at daybreak with the Deere and only had to poke one cable wire over the front edge. State trooper just waved on his way to coffee and the country cops never got off the phone to look much less wave.

    Unlike the farm supply I am not going to build a massive concrete containment vessel to park this thing in and I will not fill more than a semi load of 28% (6' deep?) For a short time.

    Inspecting the bottom of the tank I found a stain around an intrusion in a weld seam. I do not have a man hole to get inside. I have an old Hobart square wave tig and I might be able to reach the spot from underneath but have not welded overhead tig on Aluminum. Try it? Tear the top off and inspect inside and spool gun what I find would be the right way but also easy to get killed without the lifting capacity.

    1/4 aluminum overhead Tig or get more into it and call for a spool gun or spend for new aluminum welding capacity?

  2. #2
    Join Date
    Dec 2011
    Posts
    401

    Default

    Can you roll the tank so the offending seam is on the top? You are aware that some liquid fertilizer will burn/explode under the right conditions, right?---Meltedmetal

  3. #3
    Join Date
    Sep 2005
    Location
    northern NJ
    Posts
    1,860

    Default

    Fertilizer can be highly explosive! I don't know anything about what was in it but I wouldn't weld on it or in it until I was 100% sure it wouldn't blow up.
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  4. #4
    Join Date
    Oct 2007
    Location
    Cave Creek Az
    Posts
    1,009

    Default

    Does it leak, or is it just stained?

  5. #5
    Join Date
    Jun 2013
    Posts
    13

    Default

    Liquid is corrosive as can be, but not explosive. A paper cut and a few drops are too cruel for the prisoners at GitMo. Google 30% uan or Nitan. 10-34-0 will eat Aluminum so if there was some in a truck or railcar I should really go over the condition of the tank. Picture to follow soon.

  6. #6
    Join Date
    Dec 2011
    Posts
    401

    Default

    From the uan 30 MSDS :PRODUCTS OF
    COMBUSTION
    FLASH POINT
    FLAMMABILITY LIMITS
    Not applicable.
    Non-flammable.
    Material will not burn, but thermal decomposition may result in flammable/toxic gases being
    formed after material evaporates to dryness. These products are nitrogen oxides and
    ammonia (NO, NO2, NH3).
    FIRE HAZARD IN THE
    PRESENCE OF VARIOUS
    SUBSTANCES
    If evaporated to dryness, acts as an oxidizing agent, supports combustion by liberating oxygen
    even if smothered. Cool containing vessels with flooding quantities of water until well after fire
    is out. A self contained breathing apparatus should be used to avoid inhalation of toxic fumes.
    When heated to decomposition it emits toxic fumes (NH 3, N0, N02). Fire fighters should wear
    self-contained breathing apparatus (SCBA) and full turnout gear.
    Dangerous if evaporated to near dryness. Dry residue may form explosive mixtures with
    organic materials. Avoid temperatures above 100C (212F) which may result in evaporation,
    thermal decomposition or explosion.
    Residue may be dangerous in contact with flammable organic materials. Evolves toxic fumes
    when heated to the decomposition state. Avoid temperatures above 100C (212F). On
    evaporation to dryness thermal decomposition or explosion may result.
    SPECIAL REMARKS ON
    EXPLOSION HAZARDS
    EXPLOSION HAZARD IN THE
    PRESENCE OF VARIOUS
    SUBSTANCES
    Incompatible with strong reducing agents, or other oxidizers. Possible incompatibility with
    finely powdered metals (cadmium, copper, lead, cobalt, nickel, bismuth, chromium,
    magnesium, zinc, sodium, potassium and aluminum). May explode by detonation, heat or
    shock when evaporated to near dryness. Solution may detonate if subjected to heat and
    pressure.
    SPECIAL REMARKS ON
    FIRE HAZARDS
    Unconfirmed industry reports indicate a possibility that ammonium nitrate containing solutions
    may detonate if subjected to extreme heat while under pressure or if allowed to evaporate to
    near dryness.

    Please consider the information above and take the appropriate measures. Stay safe. Google "uan 30 MSDS"---Meltedmetal
    Last edited by Meltedmetal; 09-20-2013 at 11:46 AM.

  7. #7
    Join Date
    Apr 2013
    Location
    Southeast idaho
    Posts
    30

    Default Fertilizer tank Gift Horse

    For one unless it is a pressure tank ( which being aluminum its not) anhydrous ammonia (NH3) will not be present. 2 ammonium nitrate is next to impossible to get in the states… to have it in bulk on premise it must be under guard 24/7, and it is also a SOLID, DRY, fertilizer, and only an oxidizer, will not explode from heat, 3 Finley powdered meters would not be present in such a big tank because they would settle out to fast.

  8. #8

    Default Fertilizer tank Gift Horse

    A good portion of 28-0-0 or 32-0-0 uan is ammonium nitrate in solution as well as urea

  9. #9
    Join Date
    Dec 2011
    Posts
    401

    Default

    JTsharp
    Are you saying that it is safe to weld on this tank? The material I posted is copied from the MSDS for uan 30. My reading of that information is not that the liquid is anhydrous ammonia but that anhydrous ammonia can be a thermal decomposition product. Also in liquid form the material is not a fire/explosion hazard but when it is heated enough to dry it becomes one. It seems to me that this heating is likely to occur in the area surrounding the weld. How dangerous is this condition? I don't know. I am not a chemist but there is enough information in the MSDS for this product to make me seriously question whether I would weld on this tank without major precautions or look for another solution.---Meltedmetal

  10. #10
    Join Date
    Apr 2013
    Location
    Southeast idaho
    Posts
    30

    Default Fertilizer tank Gift Horse

    What I am saying is for there to be liquid anhydrous ammonia It must be under pressure . Highly unlikely something containing anhydrous ammonia was in this tank. Also when anhydrous ammonia is released from pressure it changes to gas instantly, I know this from being a farm boy. My dad sells the stuff to. Unless I knew for sure what was in it I probably wouldn't weld it.

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