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  #11  
Old 01-21-2020, 04:18 PM
Uniweld Uniweld is offline
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Quote:
Originally Posted by GWIZ View Post
We only have one member that can answer your chemical question, lets see if he shows up.
https://en.wikipedia.org/wiki/Brasso#Ingredients
Thank you - At least I got one response that makes sense!
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  #12  
Old 01-21-2020, 04:22 PM
Uniweld Uniweld is offline
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Quote:
Originally Posted by digger doug View Post
I would not go with the alcohol, are there rubber O-rings in there ?

HP oxygen ?

It should be regulated down to probably 40 psi max at the handle.
digger doug, at the actual cutting torch handle I have no idea of what O2 pressure I need as of yet because I haven't gotten the torch. I'm just trying to find out if I can use it as is or should it be cleaned of possible contaminants. I'm cautious and I know what can happen if O2 hits oil residue, or any combustible for that matter - I have no inkling what might be in that cutting head and I don't want to become a statistic...
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  #13  
Old 01-21-2020, 04:45 PM
Uniweld Uniweld is offline
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This is what I am referring to:

When valves are to be used on systems that produce or use oxygen, typically stainless steel or brass body material is chosen because oxygen causes iron to rust. Additionally they require special cleaning to prepare them for use. It is imperative to remove all matter, both organic and inorganic due to the fact that all matter will react with gaseous or liquid oxygen under certain temperature and pressure conditions. In some cases, this reaction can cause an explosion. This includes any grease or rust protection coatings. Once the valves are properly cleaned they are then sealed in a bag until ready for installation. This prevents moisture or contamination from finding its way back into or onto the valve. If needed, a desiccant is also placed in the valve to further combat moisture.

There are many different techniques used to perform cleaning on valves to be used in oxygen service. The appropriate methods are chosen based on the valve material, geometry, and intended application of the valve.

Commercial - Where oxygen is being used in a process. Preventing combustion is the main reason. This includes applications such as metal cutting and welding.
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  #14  
Old 01-21-2020, 05:00 PM
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arizonian arizonian is offline
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In a former employment, we used a heated pressure washer water with Simple Green to clean the pipe we were sending to the field. The contract spec for some spools were Oxygen Clean, and examination by black light would reveal traces of oil if the pipe was not clean enough.

If the O2 regulator was in question I would send it out to a rebuild service. The torch does not see the same kind of pressure, so I would clean it myself with Simple Green and get a black light and look for oil traces. Auto AC work kits have a small black light and yellow glasses you can use.
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  #15  
Old 01-21-2020, 06:12 PM
Uniweld Uniweld is offline
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Originally Posted by arizonian View Post
The torch does not see the same kind of pressure, so I would clean it myself with Simple Green and get a black light and look for oil traces. Auto AC work kits have a small black light and yellow glasses you can use.

Thank you! I am trying to make sure I don't have any issues when I put this thing into use. I'm feeling a little better now since I've read this.
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  #16  
Old 01-21-2020, 06:54 PM
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greywynd greywynd is offline
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Quote:
Originally Posted by Uniweld View Post
Thank you! I am trying to make sure I don't have any issues when I put this thing into use. I'm feeling a little better now since I've read this.


The site has recently gone through the loss/passing of our most active moderator, we have some new folks learning the ropes. Your initial post, along with the nickname you picked, was likely looking a little suspicious for spam. The amount of spammers forums still get is up there, and is a nuisance and an expense for forums.

I can’t help you much with your original torch question, welcome to the site and keep posting. There’s a good bunch of folks here with a broad knowledge.


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  #17  
Old 01-21-2020, 08:02 PM
Uniweld Uniweld is offline
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Default AIGA Guide to Cleaning of Equipment for O2 Service

Found this and it seems pretty relevant:

http://www.asiaiga.org/uploaded_docs...20Jan%2012.pdf
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  #18  
Old 01-22-2020, 12:58 AM
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Shade Tree Welder Shade Tree Welder is offline
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Uniweld welcome to the zoo. Dont pay too much attention to the animals.

I would recommend staying away any chlorinated solvents if you are going to
be welding. Chlorinated solvent fumes and hot metals can generate phosgene
gas. Which is rather poisonous.

The follow is flammable but for cleaning it works well. Just allow the parts to
dry well, 5-10 minutes tops at room temperature or use some compressed air
to speed it up. No poisonous gases.

https://www.amazon.com/CRC-05084-12P.../dp/B000P1R5NE

The brasso and other chemical are not that big a concern as the fact the
moron selling the equipment is blasting it, the grit and dirt can and will
destroy seals, mating surfaces etc. I would advise not to purchase the
set up.
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  #19  
Old 01-22-2020, 01:02 AM
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Shade Tree Welder Shade Tree Welder is offline
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Quote:
Originally Posted by Uniweld View Post
Found this and it seems pretty relevant:

http://www.asiaiga.org/uploaded_docs...20Jan%2012.pdf
If you do buy it I would dissassemble and use a good solvent to clean it,
like the non-chlorinated I linked above. Any oil in the O2 side of things
can be bad. Tarnish will not affect the torch operation the guy blasting
and polishing this stuff clearly does not understand this.
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  #20  
Old 01-22-2020, 06:44 AM
Uniweld Uniweld is offline
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Shade Tree Welder,

Thank you for the link and the info. I intend to disassemble the cutting torch once I receive it because of exactly what you said. I am concerned that even though he says he taped it off, I'm not taking any chances.

I will get some of that Brakleen Non-Chlorinated Brake parts cleaner to use as my cleaner as well.


Now I have to find the rebuild kit for this unit. I haven't had much luck with it so far, lots of Victor stuff (some will interchange) but not all the seals as a kit. Buying on eBay is a crap shoot for sure....

Last edited by Uniweld; 01-22-2020 at 06:55 AM.
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