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Pressure sandblaster from propane tank

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  • #31
    Silicosis Risk..!!

    the safety and/or usability of making and using a sandblaster out of a short wide thinwall tank like a 20lb propane can be argued amongst yourselves.... I personally would not be within 50ft of one.......
    some will be driven to construct one simply because they can.... not because it is a good idea.... and they will....

    the real reason for this post is to suggest that if you plan on doing any sandblasting outside of a cabinet...
    Wear Protection!!!

    Silicosis is a very real hazard to people who sandblast... so make sure that you have a source of clean air under your hood while sandblasting...
    here is a link..

    http://www.silicosis.com/respirators/index.php

    take some time and do an additional search, read and understand the hazards.. before the next time you sandblast...
    .

    *******************************************
    The more you know, The better you know, How little you know

    “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

    Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

    My Blue Stuff:
    Dynasty 350DX Tigrunner
    Dynasty 200DX
    Millermatic 350P w/25ft Alumapro & 30A
    Millermatic 200

    TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam w/ PowerMax-1000

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    • #32
      2 year old thread or not, I whole-heartily agree with Bearston and the others who urge you against building pressure vessel projects.
      http://weldingweb.com/showthread.php?t=69011
      The very real threat is nothing to play with. I'm done now, good day.
      http://weldingweb.com/showthread.php...ht=garage+bomb
      Danny

      Comment


      • #33
        Originally posted by H80N View Post
        the safety and/or usability of making and using a sandblaster out of a short wide thinwall tank like a 20lb propane can be argued amongst yourselves.... I personally would not be within 50ft of one.......
        some will be driven to construct one simply because they can.... not because it is a good idea.... and they will.......
        Those pics say enough for anybody with any common sense to avoid such a suicidal project....

        but I would like to change what I said about avoiding such a thing by 50ft..... I was wrong.... Make that 100ft...
        .

        *******************************************
        The more you know, The better you know, How little you know

        “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

        Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

        My Blue Stuff:
        Dynasty 350DX Tigrunner
        Dynasty 200DX
        Millermatic 350P w/25ft Alumapro & 30A
        Millermatic 200

        TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam w/ PowerMax-1000

        Comment


        • #34
          Originally posted by BREED
          I have a 500 gallon propane tank that I think Im going to make a blaster out of. I have no other use for it.
          or your life either.....

          so........................

          In your case we will make the standoff distance 1000ft.......

          Darwin in action.......................
          .

          *******************************************
          The more you know, The better you know, How little you know

          “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

          Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

          My Blue Stuff:
          Dynasty 350DX Tigrunner
          Dynasty 200DX
          Millermatic 350P w/25ft Alumapro & 30A
          Millermatic 200

          TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam w/ PowerMax-1000

          Comment


          • #35
            Old large propane tanks are best used for pig cookers, not continued as pressure vessels.

            If you can't afford a properly engineered pressure vessel you don't need a pressure vessel. Find a way to fix the money problem instead. Pig cookers sell for good money by the way.

            This thread deserves revival as a reminder not to do hideously stupid projects.

            I don't really care much if a builder injures themselves by such deliberately negligent acts, but if a vessel goes "boom" and turns someone's kid into a spray of teeth, hair and eyeballs that isn't cool at all.

            "Sorry about yer dead curtain climber, but I needed to sandblast some junk. She was kinda homely anyway and you are still young enough to squirt out a replacement" probably won't go over well.

            Comment


            • #36
              I have edited my original post to discourage anyone who might be foolish enough to attempt this. See the first post for details. Thanks to all for either the encouragement, or the admonishment. I appreciated both.
              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


              • #37
                I've built a few pressure blasters out of big propain tanks. Here's an article on one of them.

                http://gwd.weldingmag.com/mag/gwd_24556/
                Miller matic 350P
                Millermatic 252/Spool gun
                Miller Spectrum 875 plasma
                Miller Dynasty 200 DX
                Miller Coolmate 3
                Miller Elite ( INFERNO Digital)
                2008 Miller Trailblazer 302/Custom trailer
                Custom DX200 Crazy Cart
                Sofia 13 X 30 Lathe
                MODERN 10X50 knee mill with Fagor 40i DRO
                Craftex 30 Mill/Drill

                All this stuff below was done with Miller gear


                My YouTube vids:

                http://www.youtube.com/user/7863348

                Flickr photo's:
                http://www.flickr.com/photos/15602393@N05/sets/

                Comment


                • #38
                  Danger......

                  Originally posted by wildfire View Post
                  I've built a few pressure blasters out of big propain tanks. Here's an article on one of them.

                  http://gwd.weldingmag.com/mag/gwd_24556/
                  Wildfire
                  just because you got it into print does NOT make it a good idea!!!

                  modifying a pressure vessel without the proper engineering or hydrostatic test is not a good practice... it is downright dangerous and ill advised.....
                  Sandblasters are particularly dangerous because the sand/abrasive will erode the inside surfaces as it is being used leaving the outside visually fine...

                  The outside may look perfect but the inside may get worn paper thin over time... leaving it primed for a catastrophic and deadly rupture at any time....

                  This is especially dangerous for beginners who;s skills are lacking and who look to more experienced members for sound advice...

                  This is a Very DANGEROUS practice... use some common sense and do NOT do it...!!
                  .

                  *******************************************
                  The more you know, The better you know, How little you know

                  “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

                  Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

                  My Blue Stuff:
                  Dynasty 350DX Tigrunner
                  Dynasty 200DX
                  Millermatic 350P w/25ft Alumapro & 30A
                  Millermatic 200

                  TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam w/ PowerMax-1000

                  Comment


                  • #39
                    Propane tanks are rated at 350psi and they have a escape valve set at 250psi (Propane requires 177psi of pressure to stay liquid). If the propane tanks couldn't handle the 125psi set on that sandblaster then I could say a lot people would be dead by now.

                    Comment


                    • #40
                      A year ago I built a sandblaster with a propane tank but I did tested the tank before using with air. Filled the tank with water, making sure no air's inside and then I used my pressure washer at 50% more than the rating of the tank. I did had my propane tank inside a container full of water but I was told later on that I didn't had to. I kept the same pressure for about 10-15 minutes and no leaks.

                      Comment


                      • #41
                        It is just a bad idea!!!... over time the sand will erode the inside of the tank and fittings..(rather quickly)..... they will get thinner over time... at some point it might look perfect on the outside... while the inside is paper thin.... and will rupture at some point.... why endanger yourself or anybody else in the vicinity???.....

                        it is a pressure vessel that self degrades with use...

                        looks like darwin award material to me.... just do not take anyone with you....

                        how many times must this be pointed out???
                        Last edited by H80N; 02-24-2012, 02:08 PM.
                        .

                        *******************************************
                        The more you know, The better you know, How little you know

                        “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

                        Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

                        My Blue Stuff:
                        Dynasty 350DX Tigrunner
                        Dynasty 200DX
                        Millermatic 350P w/25ft Alumapro & 30A
                        Millermatic 200

                        TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam w/ PowerMax-1000

                        Comment


                        • #42
                          Originally posted by H80N View Post
                          It is just a bad idea!!!... over time the sand will erode the inside of the tank and fittings..(rather quickly)..... they will get thinner over time... at some point it might look perfect on the outside... while the inside is paper thin.... and will rupture at some point.... why endanger yourself or anybody else in the vicinity???.....

                          it is a pressure vessel that self degrades with use...

                          looks like darwin award material to me.... just do not take anyone with you....

                          how many times must this be pointed out???
                          I do use black beauty abrasive and I don't use that much or I would buy something big but even the ones we buy would erode after heavy use. For safety every year we should test again the tank with the pressure washer, doesn't take that much time.

                          Comment


                          • #43
                            I weld pressure tanks almost everyday at work then they get hydroed or tested with air. I treat each one with respect that i test with air. Anything could happen and each one is looked at before i add the air. No hurrys. The next 4 tanks i am building are 26 feet long and 20" in dia. I only test them to 30 psi and then a dish soap water test on the fittings but thats a lotta air. We pressure tested gasoline barges on the Ohio River with 2# of air and it takes a while to fill them up to find leaks. A guy showed me how a 1/2# that was left in the barge and if you pounded the hatch open with a hammer it had so much force it would break your leg if it hit you, 1/2#. It opened my eyes to really pay attention...Bob
                            Bob Wright

                            Spool Gun conversion. How To Do It. Below.
                            http://www.millerwelds.com/resources...php?albumid=48

                            Comment


                            • #44
                              You probably wont like mine then.
                              Attached Files

                              Comment


                              • #45
                                Wow. It's been a loooong time since I've been here. Anyway. That blaster of mine has been used now for ten years or more. The only thing I've ever replace on it was the main hose. It's longevity has to speak for itself but its been flawless so just because I built it out of a propane tank do not mean its going to fail or be dangerous to operate. I have many safety features built into it such as a safety pressure relief valve and a dump valve.
                                This unit has hundreds of hours on it and its as good as the day it was built. Everything in my collection and including my commercial work has been done with this unit. You got to be kidding when you say this unit is dangerous. The unit only handles 100psi of air. If the side came out of it the only thing would happen is it would put sand into the air.
                                When it comes to my workmanship and my blaster design You sir don't know what your talking about. Simple as that!



                                http://www.flickr.com/photos/1560239...7608396649530/














                                Originally posted by H80N View Post
                                Wildfire
                                just because you got it into print does NOT make it a good idea!!!

                                modifying a pressure vessel without the proper engineering or hydrostatic test is not a good practice... it is downright dangerous and ill advised.....
                                Sandblasters are particularly dangerous because the sand/abrasive will erode the inside surfaces as it is being used leaving the outside visually fine...

                                The outside may look perfect but the inside may get worn paper thin over time... leaving it primed for a catastrophic and deadly rupture at any time....

                                This is especially dangerous for beginners who;s skills are lacking and who look to more experienced members for sound advice...

                                This is a Very DANGEROUS practice... use some common sense and do NOT do it...!!
                                Last edited by wildfire; 02-09-2013, 02:44 PM.
                                Miller matic 350P
                                Millermatic 252/Spool gun
                                Miller Spectrum 875 plasma
                                Miller Dynasty 200 DX
                                Miller Coolmate 3
                                Miller Elite ( INFERNO Digital)
                                2008 Miller Trailblazer 302/Custom trailer
                                Custom DX200 Crazy Cart
                                Sofia 13 X 30 Lathe
                                MODERN 10X50 knee mill with Fagor 40i DRO
                                Craftex 30 Mill/Drill

                                All this stuff below was done with Miller gear


                                My YouTube vids:

                                http://www.youtube.com/user/7863348

                                Flickr photo's:
                                http://www.flickr.com/photos/15602393@N05/sets/

                                Comment

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