Elite Engineer Posted November 27, 2013 Share Posted November 27, 2013 I'm considering psaaing sulfur dioxide through pvc piping under pressure in order to make sulfuric acid. Does sulfur dioxide react with the make-up of pvc piping? Link to comment Share on other sites More sharing options...
Enthalpy Posted November 27, 2013 Share Posted November 27, 2013 At room temperature but not +60°C, PVC is given as resistent to sulphur dioxide by the manufacturers: https://www.spilltech.com/wcsstore/SpillTechUSCatalogAssetStore/Attachment/documents/ccg/CBOOM.pdf plus ipexinc and more, google: PVC "sulfur dioxide" compatibility Though, I would NOT use a Pvc pipe for pressure, with any fluid. I trust only metals for pressure, or fibers. Worse, Pvc is brittle, as opposed ot polypropylene. You don't want a deadly leak when a rock or a tree falls on your pipe, do you? Regulations forbid it probably. In case you want to stress a plastic, please remember that its long-term resistance is very different from its short-term proof stress: easily 5 or 10 times less. Link to comment Share on other sites More sharing options...
Elite Engineer Posted November 28, 2013 Author Share Posted November 28, 2013 Though, I would NOT use a Pvc pipe for pressure, with any fluid. I trust only metals for pressure, or fibers. Worse, Pvc is brittle, as opposed ot polypropylene. You don't want a deadly leak when a rock or a tree falls on your pipe, do you? Regulations forbid it probably. In case you want to stress a plastic, please remember that its long-term resistance is very different from its short-term proof stress: easily 5 or 10 times less. I did some more research, I'm going to use copper tubing..I don't know why I thought of pvc piping, as the tubing will actually go through sulfric acid Link to comment Share on other sites More sharing options...
AbeMichelson Posted December 25, 2013 Share Posted December 25, 2013 Sulfuric Acid + Copper -> Copper Sulfate! If Sulfur Dioxide is around any water it will form sulfuric acid. I would go with stainless steel. It is your safest bet. Link to comment Share on other sites More sharing options...
Sensei Posted December 25, 2013 Share Posted December 25, 2013 If Sulfur Dioxide is around any water it will form sulfuric acid. Sulfurous acid, H2SO3 (H2O + SO2 -> H2SO3) Sulfuric acid is H2SO4 You can use Hydrogen peroxide H2O2 to create H2SO4 Link to comment Share on other sites More sharing options...
Moontanman Posted December 25, 2013 Share Posted December 25, 2013 I'd go with CPVC at least, it's high temperature resistant and corrosion resistant... http://en.wikipedia.org/wiki/Chlorinated_polyvinyl_chloride Link to comment Share on other sites More sharing options...
Enthalpy Posted December 25, 2013 Share Posted December 25, 2013 Plastic pipes and pressure? Beware! Here a corrosion table for sulfur dioxide and metals: http://www.google.de/search?q=%22Sulfur+dioxide%22+Copper+compatibility&ie=utf-8&oe=utf-8&rls=org.mozilla:fr:official&client=firefox-a&gws_rd=cr&ei=NRO7UpzZOMebtAbd9IH4AQ "stainless steel" isn't precise enough. Link to comment Share on other sites More sharing options...
Moontanman Posted December 25, 2013 Share Posted December 25, 2013 CPVC is both temp and pressure rated... Link to comment Share on other sites More sharing options...
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