Hom-made Sandblaster Pressure Pot Project...

#1 you welded a cast iron fitting to mild steel; cast iron is difficult to weld without cracking by itself #2 I can clearly see it the pics where the legs of the weld are not fused, and also the corners are not tied in.

 

well, maybe after you go to school for welding, you'll understand a little more about the properties of cast iron.....

hopefully you will be able to lay a stack of dimes like those in that pic.....

we will see

 

OK.....ONE MORE TIME FOR THE RECORD...there will be no closed valve at the end of this system to allow pressure to build up........is everyone missing that point???


I done this thread to show that you can take a piece of junk and make something useful out of it. And so far with the exception of a few "looks goods" I've caught more crap over it from peoples opinions than what they know to be actual fact.

GIVE ME ANOTHER WEEK, I'LL PUMP THIS MOFO UP AND EITHER I OR YOU WILL BE EATIN CROW.

 

Worst case, is your next of kin will be writing a "RIP" thread, where we'll all post "Sorry to hear that".

I'm not bagging on your welding or project because I don't know how to do that kind of stuff myself, but my own common sense tells me that if you don't have a dead-man valve at the end of the hose or something, you're either going to have to turn on your air valves while holding the hose and pointing it somewhere safe, or you're going to try and grab a whipping sandblasting snake. Either one, I'd be interested in hearing about. Schadenfreude!

But the thing that irritates me a little is when folks interject and bag before the project is completed or ruined. It's made me decide against doing project threads before the project is complete. I know I'll have questions, but I think I'll stick to asking them via PM. That's the safe way for me to post, in my opinion. Your mileage may vary.

 

Nevala, well spoken.....

Also my father uses a pressure pot daily for engraving tombstones...80psi all day long, his preffered setup is no trigger or deadman valve, less bulky for doing fine blasting...less parts to replace...Typically set everything up and then have the nozzle in hand, open sand valve, and open air valve.......the hose is heavy enough that IF you have to lay it down there is minimal whipping.

Here is a link to the wire I use, works good accross a braod spectrum. I would like to also point out, that while the term CAST IRON has come up multiple times, these are actually CAST STEEL......which makes a structural difference. I do believe earlier I did say that welding cast materials depended on the makeup....

http://www.unibraze.com/DataSheets/Data70S-6.pdf

 

Here's a good WIKI leak to spark testing cast steels vs irons.......

 

Hey man, if you know everything - why are you even posting it on here? So someone that thinks they can weld will go out and build one only to have it explode and rip their head off? Just wondering if you're trying to break your arm patting yourself on the back, or giving advice on a bad idea.

 

I give up, I don't know what else to say.........thought it would be a cool post and save some people some dough......

I mean your building hot rods on here, building motors, a sand blasting tank is pretty simple......I'f you can't put one of these together then you have no business building a hot rod and driving it down the road....

Think about it, C-notching frames, stretching axles, welding up suspension components, and then driving down the road 70 mph, or drag racing something.

 

I've had a TIP blaster since 1976. I gave up trying to keep the ball valve seals or ball from wearing out too quickly, so now I just leave it open. The only time I close it, is when something gets stuck in the nozzle.

The whole valve/nozzle is so heavy that it can't whip around.


Cast steel would be ok with me, but I am sure I would not try cast iron there. That was a good idea about a pipe sticking up with a screw-on cap.

 

Here's another idea, I made mine out of a bladder tank from my well pump. I have put 140 psig in it , but usually it's 120 and down as you blast. I've been using this to blast since the early 80s. If anyone is interested ,I'll post pics.

 

Hmm a home made blaster made in the 80's? and it is still working? and hasn't blown up? interesting.......lol

Hey Joel, I'd love to see your setup, just be careful posting or the wolves might get yah. I've learned my lesson......won't post any more until its up running and functional. I thought it would be neat to do a diary type build of somethign like this....

 

I know that this is an old thread, but do you have any pics?

-- and --

Lots of compressors have cast fittings welded to their tanks, _and_ "black iron" fittings/pipe tend to be made of steel, they're just called black iron or galvanized to differentiate between if they're zinc coated or not.

 

Yeah Man, I am with you on this

 

I used a portable air tank for mine and used all sch.80 fitting to weld to the tank. 4" coupling for the top with a 4" plug for easy fill. Copyed the HF model. Worked great till someone decided they wanted it more than I.

 

Note: Clitonvillian is banned

 

Most states I know of require welding done on a pressure vessel (over 15psi) to be done by a certified welder with an "R" stamp certificate.

 

I made a sand blaster years ago (when they were expensive) out of a 30lb Propane bottle (time expired). I did it without welding, the top is bolted on, never had a problem.

Well I did weld the legs on, they are old jack handles lol ha ha.