Gas question
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Thread: Gas question

  1. #1

    Gas question

    Hi guys , encountered a rookie problem today l think, was using mig welder outside for a very small job , when finished l turned the gas off but left welder running , aftera short time there was a sharp bang , and gas pipe from regulator to welder burst , its thin plastic pipe that came with welder .
    Never happened before , had unit for a few years just wondered what cause was , is it simply that welder was left on ?
    Thanks. Jim

  2. #2
    Join Date
    Jun 2012
    Bemidji MN

    Re: Gas question

    Your regulator may have failed and over pressured the tubing.

    After closing the valve, there is still a little high pressure between the valve and regulator - may have bled through.
    Last edited by MinnesotaDave; 06-11-2018 at 10:41 AM.
    Dave J.

    Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~

    Airco 300 - Syncro 350
    Invertec v250-s
    Thermal Arc 161 and 300
    Tried being normal once, didn't take....I think it was a Tuesday.

  3. #3
    Join Date
    Jun 2009
    Draper, UT

    Re: Gas question

    was the welder and hose in direct sun? maybe the hose softened in the sun and with both the solenoid and valve closed the pressure increased to the bursting point of the softened hose.
    MillerMatic 252, HTP 221 w/cooler, Hypertherm PM45

    "No matter where you go, there you are" [Buckaroo Bonsai]

  4. #4
    Join Date
    Apr 2006
    Soda springs,Id

    Re: Gas question

    Replace the plastic one with a rubber hose. After it's installed turn on the gas and then turn it off and watch the low pressure gauge. If it starts increasing the reg is bad.
    Ol' Stonebreaker
    "Experience is the name everyone gives to their mistakes"

    Miller 175 mig
    Miller thunderbolt ac/dc stick
    Victor O/A setup
    Makita chop saw

  5. #5

    Re: Gas question

    Many thanks guys , yes it was in sunlight, (warm here for a change ) so hose would be soft , will replace with rubber hose and check regulator.
    Many thanks. J

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