On Tue, 25 Jun 2002, Spehro Pefhany wrote:

>At 12:54 PM 6/25/02 -0500, you wrote:
>
>>Don't think I will try, but according to the instructor,
>>you can weld tanks which have already had fuel in them,
>>by filling them with water.
>
>I've heard of steam cleaning plus filling them with CO2.

Filling with nitrogen, steam, or *COLD* engine *exhaust* gas.

>People have died doing things like this.
>
>Say, anyone have any first hand knowledge of flashback arrestor design?
>I'm trying to cob one together for a small Hyrogen-Oxygen torch.

Not first hand but in general small holes do that. A porous ceramic gas
filter and/or steel wool trapped in an inline fixture should do it.

Peter

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