Fuel tanks & welding

  1. P@ul New Member

    Messages:
    15
    Location:
    UK, Sussex
    Just starting to prep my landrover for welding which also means removing the diesel tank which got me thinking :confused:
    When you guys are welding on a vehicle when do you decide to remove the fuel tank, how close is to close and do you treat petrol and diesel differently?
     
  2. mr haynes Member

    Messages:
    226
    Location:
    uk
    Depends on the job. If it's a patch try to leave in place, a resto would remove tank as matter of course whether welding or not
     
  3. julianf

    julianf Member

    Messages:
    3,911
    Location:
    devon, uk
    You can throw a match in a can of diesel and it will just go out.

    Unless you're actually heating the skin of a diesel tank I would have no concern, beyond my usual precaution of having a fire extinguisher to hand.
     
    brightspark and slim_boy_fat like this.
  4. Tinbasherdan

    Tinbasherdan Bodger in chief

    Messages:
    4,425
    Location:
    Bolton, England
    I’ve welded diesel tanks with fuel in, it’ll boil long before it flashes. If I’m feeling a bit nervous I chuck a purging line in for 10 mins
     
  5. doubleboost

    doubleboost Member

    Messages:
    2,547
    Location:
    North Easr England
    Closer than you would believe
     
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  6. RonA

    RonA specialist in repairing sealed for life equipment

    Messages:
    1,296
    Location:
    Stockton on Tees, UK
    I used to test diesel tanks on Sentinel locos prior to welding. We drained the tanks below the leak & then innerted the space above with bottled Nitrogen, checked the Oxygen level in the tank was zero & started welding.
    It’s the old fire triangle fuel, heat, Oxygen, remove one of the legs & your can’t start a fire or explosion (which is only rapid combustion)
    RonA
     
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  7. F.J.

    F.J. Member

    Messages:
    1,568
    Location:
    Manchester
    I’ve TIG welded shelves inside a diesel tanker while still holding a good 4-5 inches of red in it, no problems there.

    I have also tig welded the seam on a 50 year old Massey Ferguson tractor that ran on paraffin and although it was drier than a desert in there you should of heard the bang it made. Once I’d come to my senses I couldn’t stop laughing as all the swage lines and shapes had blown out of it and it was shaped like a ball!
     
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  8. pedrobedro

    pedrobedro Man at Matalan

    Messages:
    9,608
    Location:
    CX Derbyshire
    Only tank I ever removed was on a mk4 Cortina and that was because I needed to get above it. Diesel I would not worry about.
     
  9. p0689109 Member

    Messages:
    1,623
    Location:
    stoke on trent,england
    As it is a LR I would remove it to check for more corrosion!
     
    Westfield-builder and Parm like this.
  10. P@ul New Member

    Messages:
    15
    Location:
    UK, Sussex
    Thanks for all the replies, looks like I've been over cautious.:D
     
  11. The_Yellow_Ardvark

    The_Yellow_Ardvark If in doubt ask. Same rules for everyone

    Messages:
    10,367
    Location:
    UK
    Better safe than sorry.
     
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