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Posted by Sergey Kubushin on February 21, 2008, 11:30 am
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> Maxwell wrote:
>>
>>>SteveB wrote:
>>>
>>>>Went to propane for cutting without a thought for welding. Do they make
>>>>propane welding tips? Been googling, but haven't found any yet.
>>>>
>>>>Steve
>>>
>>>Propane, unlike acetylene, will inject lots of free hydrogen into the weld
>>>zone, leaving the weld brittle from the phenomenon called hydrogen
>>>embrittlement. The only fuel gas suitable for welding is acetylene - that
>>>is
>>>the only reason it is still sold.
>>>
>>>Save money on cutting or heating with propane or other fuel gases, but if
>>>you
>>>want to weld, you need to stock acetylene.
>>>
>>
>>
>> Does the same go for natural gas? I have always considered converting, but
>> had never heard this.
>
> Yes, NG, propane, chemtane, MAPP, flameall, propylene and propadiene all
> are unsuitable for torch welding. All inject too much hydrogen into the
> weld, making it brittle. The only suitable gas for WELDING is acetylene.
It is only true if you replace plain WELDING with "WELDING STEEL" :)
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Posted by SteveB on February 21, 2008, 12:38 pm
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> Maxwell wrote:
>>
>>>SteveB wrote:
>>>
>>>>Went to propane for cutting without a thought for welding. Do they make
>>>>propane welding tips? Been googling, but haven't found any yet.
>>>>
>>>>Steve
>>>
>>>Propane, unlike acetylene, will inject lots of free hydrogen into the
>>>weld
>>>zone, leaving the weld brittle from the phenomenon called hydrogen
>>>embrittlement. The only fuel gas suitable for welding is acetylene - that
>>>is
>>>the only reason it is still sold.
>>>
>>>Save money on cutting or heating with propane or other fuel gases, but if
>>>you
>>>want to weld, you need to stock acetylene.
>>>
>>
>>
>> Does the same go for natural gas? I have always considered converting,
>> but had never heard this.
>
> Yes, NG, propane, chemtane, MAPP, flameall, propylene and propadiene all
> are unsuitable for torch welding. All inject too much hydrogen into the
> weld, making it brittle. The only suitable gas for WELDING is acetylene.
>
> Saith Ernie in his gas welding class.
>
> Grant
Well dang. I went to propane to save money, and now it looks like I'll be
getting an acetylene cylinder anyway. Sheesh. See what happens when you
ASS-U-ME? Good thing I saved the acetylene hoses when I replaced them with
T type. I never throw anything out anyway.
Steve
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Posted by Jim Elbrecht on February 21, 2008, 12:13 pm
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-snip-
>Well dang. I went to propane to save money, and now it looks like I'll be
>getting an acetylene cylinder anyway. Sheesh. See what happens when you
>ASS-U-ME? Good thing I saved the acetylene hoses when I replaced them with
>T type. I never throw anything out anyway.
Does using the T type hose with another gas make it unusable for
Acetylene? [or is it just good practice to not change gases in any
hose.]
Jim
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Posted by Grant Erwin on February 21, 2008, 12:18 pm
Please log in for more thread options Jim Elbrecht wrote:
>
> -snip-
>
>>Well dang. I went to propane to save money, and now it looks like I'll be
>>getting an acetylene cylinder anyway. Sheesh. See what happens when you
>>ASS-U-ME? Good thing I saved the acetylene hoses when I replaced them with
>>T type. I never throw anything out anyway.
>
>
> Does using the T type hose with another gas make it unusable for
> Acetylene? [or is it just good practice to not change gases in any
> hose.]
>
> Jim
R type is only for acetylene, and is cheaper.
T type is for all gases including acetylene.
I switch all the time.
Grant
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Posted by SteveB on February 21, 2008, 2:09 pm
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>
> -snip-
>>Well dang. I went to propane to save money, and now it looks like I'll be
>>getting an acetylene cylinder anyway. Sheesh. See what happens when you
>>ASS-U-ME? Good thing I saved the acetylene hoses when I replaced them
>>with
>>T type. I never throw anything out anyway.
>
> Does using the T type hose with another gas make it unusable for
> Acetylene? [or is it just good practice to not change gases in any
> hose.]
>
> Jim
From what I understand, there are chemicals (or gases) in the propane that
are not compatible with acetylene hoses and you have to use a particular
hose for propane. Don't know if the other is true on using a T hose for
acetylene. How about it Ernie? Are they interchangeable?
Changing the hoses to a T hose was one of the first cautions. Using the
acetylene reg on propane was okayed by people with more knowledge on such
things as I.
Steve
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