Comandante Posted April 8, 2010 Share Posted April 8, 2010 Hey all, I'm trying to attach a Bunsen burner to an LP gas cylinder but I have problems finding the right adaptor and tubing for the cylinder. I have a piece of vinyl tubing of ~1.5mm wall width and I'm wondering if anyone knows how to calculate the maximum internal pressure that this tubing can withstand. I know the LPG cylinder is ~3.3MPa when full and it just looks to me like this tubing would not hold it so I don't want to try it just yet, would like some numbers. Any ideas? Link to comment Share on other sites More sharing options...
John Cuthber Posted April 8, 2010 Share Posted April 8, 2010 I think you need a pressure regulator. Link to comment Share on other sites More sharing options...
Comandante Posted April 9, 2010 Author Share Posted April 9, 2010 apparently the 3mm standard rubber tubing is suitable for use. i have some 2mm spare will try it when i get adaptor for the cylinder. will post how it went. Link to comment Share on other sites More sharing options...
John Cuthber Posted April 10, 2010 Share Posted April 10, 2010 Unless the burner is designed to deal with gas at 3.3 MPa then this is, at best, not going to work. Most of the Bunsens I have seen are designed to work with about 200 mmH2O (A seriously non SI unit) equivalent to 2.5 KPa i.e. a thousand times less gas. Link to comment Share on other sites More sharing options...
Comandante Posted April 10, 2010 Author Share Posted April 10, 2010 That's what I would've expected. This burner is labelled as designed for LPG though, and from all the cylinders I inspected at the hardware store all were are at 3.3MPa, seemed like it's a standard. I'll go check out another store on Monday, they better have something suitable... Btw, this is the burner I have; http://cgi.ebay.com.au/LH0050-LPG-Bunsen-Burner-Slide-Collar-LPG-NEW_W0QQitemZ330422422011QQcmdZViewItemQQptZAU_Business_Industrial_Medical_Scientific_Equipment2?hash=item4ceeb609fb#ht_500wt_1182 Link to comment Share on other sites More sharing options...
Moontanman Posted April 10, 2010 Share Posted April 10, 2010 That's what I would've expected. This burner is labelled as designed for LPG though, and from all the cylinders I inspected at the hardware store all were are at 3.3MPa, seemed like it's a standard. I'll go check out another store on Monday, they better have something suitable... Btw, this is the burner I have; http://cgi.ebay.com.au/LH0050-LPG-Bunsen-Burner-Slide-Collar-LPG-NEW_W0QQitemZ330422422011QQcmdZViewItemQQptZAU_Business_Industrial_Medical_Scientific_Equipment2?hash=item4ceeb609fb#ht_500wt_1182 Seriously, it needs a regulator, it is not designed to use full pressure from the cylinder, any gas grill regulator should work. Find an old gas grill and take the regulator from it, i see them in the trash all the time. Link to comment Share on other sites More sharing options...
Comandante Posted April 11, 2010 Author Share Posted April 11, 2010 I figured as much from John's numbers, that's what I meant by something suitable But for some reason I suspect they won't have it, wouldn't be the first time these undersupplied hardware stores fail to provide. In that case I may have to look through the trash you mentioned Oh by the way, I found 2 online, but I'm not sure which one would be better, what do you think: this: http://cgi.ebay.com.au/2-75kpA-LPG-Regulator-Low-Pressure_W0QQitemZ320482001284QQcmdZViewItemQQptZAU_Barware?hash=item4a9e374184#ht_842wt_939 or this: http://cgi.ebay.com.au/Variable-Pressure-LPG-Regulator_W0QQitemZ320482002623QQcmdZViewItemQQptZAU_Barware?hash=item4a9e3746bf#ht_807wt_939 Link to comment Share on other sites More sharing options...
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