question with gas cylinder

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i got a 60CU cylinder how much PSI should that be filled to?i think my gas distributor is rippin me off..i heard 2000 psi..i get home only to have 1500 psi..also.. how long should a 60cu last in hours?
Reply:Price depends on where it's filled.If they fill it to 2000 psi and don't let it cool when the bottle cools it will have around 1700-1800psi.Figure 60cf at a flow rate of say 20cfh nets you 3hrs of weld time.Torchmate 2x2 CNC with Flashcut CNC controlsHypertherm Powermax45 Esab ET220i Razorweld 195 MigRazorweld 200ac/dc TigTormach 770, Tormach xstechRazorweld, Vipercut/Vipermig, SSC Foot Pedal Dealer
Reply:Depends. Cylinders are all marked with their working pressure on the cylinder neck. Some are rated at 2015 psi, some 2400 and so on. "Full" would depend on if the "60 cf" cylinder is rated at 2015 or 2400 for example. Some CO2 cylinders are rated at 1800psi for example....No government ever voluntarily reduces itself in size. Government programs, once launched, never disappear. Actually, a government bureau is the nearest thing to eternal life we'll ever see on this earth! Ronald Reagan
Reply:A "good" tank is rated over 3000psi.  Not all tanks are "good" tanks, though.  Also, not all distributors have 3000psi capability.  Also, as you probably know, the CF of gas actually in your tank depends directly on its pressure (actually its pressure at a set temperature since its pressure will rise with temperature).
Reply:Maybe some kinds of tanks are, but actual welding tanks are 2400 psi max. Some, as DSW stated above are rated less.Full tanks of 75/25, in my experience, are between 1800 and 2000 psi. Straight argon usually close to 2400. 1500psi does sound low to me.JohnA few weldersA lot of hammersA whole lot of C-clamps
Reply:Hello Nberg03, there is another consideration that hasn't been discussed here, "temperature", typically any gas-distributor will take into account the ambient temperature at the time of fill. This allows for expansion/contraction issues and how that might affect the stability and safety of the cylinder in addition to all of the other comments that others have made.This is the example that I'll put forth: a company in North Dakota during the cold of winter fills a compressed gas cylinder to 2750 psi.(in many cases a common pressure) The cylinder is bought/traded-out by someone who is from Dallas, Texas. The cylinder makes the trip to Dallas and is put into the person's shop but not used right away. Summertime rolls around and the temperatures rise to over 100. What do you think happens to the gas in the cylinder? Obviously due to expansion relative to temperature the pressures will start to rise dramatically! Fortunately for us, bottles have safety features in place to address these sorts of scenarios should something like this occur. There are "blast" discs in the little round cap that is on the side of the cylinder valve, it is the one with the little holes drilled around the outer diameter of it. Should over pressure occur, this will yield and dissipate the pressure in a safe manner. Hope this somewhat explains a portion of your question. Yet, 1500 psi does seem low for a "new" cylinder. Best regards, AllanEDIT: if the reverse of the above scenario were put into play, you would see low pressures displayed by the bottle that had gone from the hot area to the cool one.Last edited by aevald; 06-20-2013 at 09:32 PM.Reason: to add informationaevald
Reply:thanks for replys, im still gonna watch him fill it next time..