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I have received a CO2 cylinder from an online seller fitted with a protective cap over the valve:

I understand these should unscrew, but this one appears to be stuck very firmly. Is there a standard or recommended way to remove these safely? The biggest challenge seems to be securing the cylinder itself to stop it slipping while attempting to turn the cap with a strap wrench or similar. Any tips?

Riot
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3 Answers3

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Use two strap wrenches or an equivalent - one on the tank and one on the cap.

You won't crush the tank :)

If you need to make one, then a length of 4*2 and some old car seat belt bolted to one end works well enough - it did when I had to do something similar.

Solar Mike
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I tried very large strap wrenches, a heat gun, the lot. In the end, nothing short of an angle grinder would do the job.

Be careful with the depth of your cut, to avoid hitting the valve.

I would not try this on any cylinders containing flammable gases or oxygen!

Riot
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It’s all about leverage in this case. I used the crowbar (the hook side with the split hammer claw) Insert the split into the cap hole and create a leverage by pulling on the end of the crowbar. The longer the crowbar the easier to unscrew. Dude who took an angle grinder is clearly on a death wish.

user37612
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