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Pressure sandblaster from propane tank

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  • Pressure sandblaster from propane tank

    UPDATE 01/18/12

    Upon further reflection, and several friendly warnings from those more experienced in such things than me, i am removing all the original text from this post and warning others what a stupid idea this is, and it should not be undertaken if you value anyone's life. After reading the thread linked further down this thread regarding the danger of pressure vessel welding, i completely agree that it was way above my ability, and added to that fact, it was a rusty discarded tank to begin with. I wanted a project and I had the tank laying around, but I did not realize what a dangerous idea it was.

    To the several Brothers who objected to this project, especially tanglediver and Bearston, thank you for your concern and advice.

    I will concur with those advising not try this dangerous stupid project.









    Last edited by Joe from N.Y.; 02-04-2012, 11:41 PM.
    Millermatic 211
    Everlast 200DX TIG
    Lincoln Weld-Pak 100
    Century Stick welder
    Hypertherm Powermax 30 plasma cutter
    Oxy set-up with Henrob 2000 torch
    Logan 200 lathe (60 years old)
    Jet band saw

  • #2
    these were cut out of previous message







    Millermatic 211
    Everlast 200DX TIG
    Lincoln Weld-Pak 100
    Century Stick welder
    Hypertherm Powermax 30 plasma cutter
    Oxy set-up with Henrob 2000 torch
    Logan 200 lathe (60 years old)
    Jet band saw

    Comment


    • #3
      and the last two





      Finished and painted:

      Last edited by Joe from N.Y.; 01-03-2010, 09:55 PM.
      Millermatic 211
      Everlast 200DX TIG
      Lincoln Weld-Pak 100
      Century Stick welder
      Hypertherm Powermax 30 plasma cutter
      Oxy set-up with Henrob 2000 torch
      Logan 200 lathe (60 years old)
      Jet band saw

      Comment


      • #4
        Cool idea. I do not really understand the large top fitting though. Is this just a cap to fill it (what size is that NPT). Also why do you "T" it off and run a hose to the bottom "T". Is this how they are supposed to be. Is this just to induce air into the sand at the bottom "T". Also what is your safety blow-off set at. I might make one.
        T.J.
        Miller Dynasty 300DX
        HTP MIG 240
        HTP 380 Plasma

        Bridgeport Milling Machine
        South Bend Lathe
        Etc. Etc....
        tjsperformance.com

        Comment


        • #5
          Originally posted by TJS View Post
          Cool idea. I do not really understand the large top fitting though. Is this just a cap to fill it (what size is that NPT).
          Yeah, that is 2 inch pipe cut off for a filler hole. You use a funnel and pour your media in then cap it tight, using a piece of an old innertube as a gasket.

          Originally posted by TJS View Post
          Also why do you "T" it off and run a hose to the bottom "T". Is this how they are supposed to be. Is this just to induce air into the sand at the bottom "T".
          The air enters the tank above the media (sand) and forces it down and out the bottom, while at the same time, an alternate path of air is routed down outside the tank and then joins the flowing sand at the "T" fitting. This keeps the sand moving with required pressure.

          Originally posted by TJS View Post
          Also what is your safety blow-off set at. I might make one.
          I put a 125 PSI safety valve for a safety blow off. My compressor just about reaches that pressure, and i use the plastic regulator to keep below 100 PSI. Since the photos, i replaced the washing machine water hoses with real hydraulic hoses i got from the Northern Hydraulics catalog. The blaster works excellent. I used to have a siphon type toy from Sears, It always clogged up and generally sucked. But this thing just blasts away rust and paint at an unbelievable rate. I use Black Beauty Abrasive, and i don't choke on silica dust anymore. This is one of the most useful projects i have built.
          Millermatic 211
          Everlast 200DX TIG
          Lincoln Weld-Pak 100
          Century Stick welder
          Hypertherm Powermax 30 plasma cutter
          Oxy set-up with Henrob 2000 torch
          Logan 200 lathe (60 years old)
          Jet band saw

          Comment


          • #6
            I have used a propane tank before to make a tire bomb to inflate truck tires

            Comment


            • #7
              To add to the OP's explaination -- the valve under the tank is only opened part way to regulate the amount of sand that comes out. If opened all the way you usually get way to much sand. The valve on the end of the hose (where the sand comes out to blast) should be opened all the way or it will have a short life as the sand will wear it away quickly if used to regulate flow by leaving it part way opened.
              MM250
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              • #8
                nice looking blaster but if you you use it a lot it will wear through the t fitting on the bottom, on commercial unit the t is actually a 4 way fitting with a plug in the bottom so there is more material there to wear.

                Comment


                • #9
                  Nice project Jonh and it's a good size for portable and small job. A use to be a sandblaster my self for 5 ears, 7 ears ago whit industriel big stuff!! Your kit is very cool , and y see that your a welder debutant seeing your welds
                  Ricau
                  XMT 304 cc/cv 208/480 volts
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                  sigpic
                  www.ricau.ca

                  Comment


                  • #10
                    Originally posted by MMW View Post
                    To add to the OP's explaination -- the valve under the tank is only opened part way to regulate the amount of sand that comes out. If opened all the way you usually get way to much sand. ...
                    Thanks for clarifying that point. You are completely right. if opened up too much, the blasting nozzle loads up with media and you get a real sh1t storm out of the nozzle when you hold the deadman lever, and a mess to clean up in the driveway.
                    Millermatic 211
                    Everlast 200DX TIG
                    Lincoln Weld-Pak 100
                    Century Stick welder
                    Hypertherm Powermax 30 plasma cutter
                    Oxy set-up with Henrob 2000 torch
                    Logan 200 lathe (60 years old)
                    Jet band saw

                    Comment


                    • #11
                      Originally posted by ricau View Post
                      Nice project Jonh and it's a good size for portable and small job. A use to be a sandblaster my self for 5 ears, 7 ears ago whit industriel big stuff!! Your kit is very cool , and y see that your a welder debutant seeing your welds
                      Ricau
                      Indeed i am. if i was younger, i would have been embarrassed to post the photos of my crap welds, but at this point in life, what the h e l l. if somebody could get an idea from the photos, great. I haven't touched a welding machine in over 10 years. i just retired from a hectic public sector job that kept me busy for years. i am finally getting around to doing the things i used to like to do in my free time. i picked up a 1988 jeep wrangler that needs a bit of welding, so i will get a bit better hopefully when the weather improves here in NY
                      Millermatic 211
                      Everlast 200DX TIG
                      Lincoln Weld-Pak 100
                      Century Stick welder
                      Hypertherm Powermax 30 plasma cutter
                      Oxy set-up with Henrob 2000 torch
                      Logan 200 lathe (60 years old)
                      Jet band saw

                      Comment


                      • #12
                        Originally posted by Joe from N.Y. View Post
                        Indeed i am. if i was younger, i would have been embarrassed to post the photos of my crap welds, but at this point in life, what the h e l l. if somebody could get an idea from the photos, great. I haven't touched a welding machine in over 10 years. i just retired from a hectic public sector job that kept me busy for years. i am finally getting around to doing the things i used to like to do in my free time. i picked up a 1988 jeep wrangler that needs a bit of welding, so i will get a bit better hopefully when the weather improves here in NY
                        Practice, settings and seat time Joe...
                        T.J.
                        Miller Dynasty 300DX
                        HTP MIG 240
                        HTP 380 Plasma

                        Bridgeport Milling Machine
                        South Bend Lathe
                        Etc. Etc....
                        tjsperformance.com

                        Comment


                        • #13
                          Nice job JOE! Looks just as good as a retail unit. Keep up the good work. Darrell

                          Comment


                          • #14
                            Hey Joe,
                            Thanks for the photos.
                            Nick

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                            • #15
                              Originally posted by Joe from N.Y. View Post
                              Yeah, that is 2 inch pipe cut off for a filler hole. You use a funnel and pour your media in then cap it tight, using a piece of an old innertube as a gasket.
                              hey, i made a blaster a few months back, it is similar to yours, the filler port is the same, 2" nipple and cap. how do you have the inner tube sealing the cap? could you take a pic? mines leaking, i tried a few diff ways to place the tube but it still leaks.
                              thanks

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