[TheForge] RE: Fact or urban myth?

[James Binnion]

The only way that I can think of that this could be a problem is if  
there were residues of the acetylene in the equipment and you were to  
exceed 15 PSI. The acetylene wants to make metallic acetylides at  
high pressure and these are unstable and will explode. but I have  
never heard of this as a danger before.
Jim
On Aug 28, 2006, at 2:03 PM, Michael wrote:

>
>
> Recently I came across a warning against using hydrogen in welding  
> equipment
> previously used with acetylene, due to the possibility of explosion  
> when
> hydrogen gas encounters acetylene residues.
>
> I wrote to the person who had posted this warning on his site, and  
> received
> his assurances that the danger was very real, and that he had  
> checked his
> facts with knowledgeable people who were involved in both oxy- 
> hydrogen and
> oxyacetylene welding back in the thirties and forties.
>
> Nevertheless, I can find no mention of this hazard anywhere else.  
> If someone
> can throw more light on the issue, I'd be obliged.
> Mikey
>
>
>
>
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James Binnion
jbin at well.com