Opening your bottle valve all the way or couple turns

admin

I was wondering if it makes a differnce to open your bottle of argon all the way or just 2 turns? I've seen a good welder open it all the way and my Machinest says he opens his only 1/4 of 1 turn. I usually do about 2 turns. Thank guys!
Reply:Depends on what is in the bottle. Argon open all the way.
Reply:High pressure valves - not necessary but won't hurt to open them all the way either.Here's the thread I posted on it: http://weldingweb.com/vbb/showthread.php...ngs&highlight=Dave J.Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~ Syncro 350Invertec v250-sThermal Arc 161 and 300MM210DialarcTried being normal once, didn't take....I think it was a Tuesday.
Reply:I was told that my argon tank had seals at each end of the valve's travel , and that it sealed best when open all the way or closed all the way.   That makes sense to me.    I have not bothered to check the valve for leaks after only 2 turns.     To confirm that is seals OK with partial opening you would probably have to check every time you use it for weeks.Dan----------------------------Measure twice.  Weld once.  Grind to size.MIG:  Lincoln SP100 TIG/STICK:  AHP Alphatig 200X
Reply:1 turn here.Weld like a "WELDOR", not a wel-"DERR" MillerDynasty700DX,Dynasty350DX4ea,Dynasty200DX,Li  ncolnSW200-2ea.,MillerMatic350P,MillerMatic200w/spoolgun,MKCobraMig260,Lincoln SP-170T,PlasmaCam/Hypertherm1250,HFProTig2ea,MigMax1ea.
Reply:couple turns, I'm a renegade. Ain't nobody got time for that...Welding/Fab Pics: www.UtahWeld.com
Reply:We must be talking about twists of the wrist and not full turns of the valve here.  All the ones I have are only about two full rotations anyway. Maybe there's one that's two & a half, I dunno. Unless there's is some compelling safety reason to do otherwise, like acetylene, I never give it a second thought. It's not like it's labor intensive or anything. "The things that will destroy America are prosperity at any price, peace at any price, safety first instead of duty first, the love of soft living and the get rich quick theory of life." -Theodore Roosevelt
Reply:It was my understanding that opening a high pressure cylinder valve all the way "backseats" the valve stem and prevents leakage. Maybe I'm wrong?
Reply:From my other thread:Dave J.Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~ Syncro 350Invertec v250-sThermal Arc 161 and 300MM210DialarcTried being normal once, didn't take....I think it was a Tuesday.
Reply:Originally Posted by MikeGyvercouple turns, I'm a renegade. Ain't nobody got time for that...
Reply:Whats next ....which foot is forward when you weld? Do you let your leads cross over each other? Do you like the welding cart on your left or right while welding? Jockeys or briefs while welding? .....jeesh
Reply:Go jack off
Reply:Thanks everyone!
Reply:With O/A if you get a hose fire and both valves are opened all the way you'll think it takes an eternity to close them!!                                            MikeOl' Stonebreaker  "Experience is the name everyone gives to their mistakes"Hobart G-213 portableMiller 175 migMiller thunderbolt ac/dc stick Victor O/A setupMakita chop saw
Reply:I personally think that this is a very relevant question, for years I I was told to open valves all the way.  Never did, guess I'm a rebel or something....really just too lazy I think.  Now I don't feel guilty....And I will sleep like a baby.Measure with a micrometre, mark with chalk,  cut with a torch.Never force anything...just get a bigger hammer.RoyOld Airco buzz box approx 1974Lincoln mig pack 15Lincoln 175 square wave1954 9" south bend lathe
Reply:Originally Posted by Bosco99Whats next ....which foot is forward when you weld? Do you let your leads cross over each other? Do you like the welding cart on your left or right while welding? Jockeys or briefs while welding? .....jeesh
Reply:Open all the way, and then back off a quarter turn.  Following the protocol used on cylindets during my diving / deep sea days.  Hooyah!"Discovery is to see what everybody else has seen, and to think what nobody else has thought" - Albert Szent-Gyorgyi
Reply:Originally Posted by MinnesotaDaveAny question that potentially deals with safety is a good question.
Reply:Originally Posted by SlobX2.I was always told 1/4 turn on acetylene or fuel gas cylinders, and all the way on oxygen or inert type gasses. This was for quick shut down in case of a blown regulator, severed hose, failed connection, etc.It is the practice I've always followed.
Reply:Edit edit editLast edited by Bosco99; 12-12-2014 at 11:07 AM.Reason: edit edit
Reply:Originally Posted by motolife313Go jack off
Reply:Edit edit editLast edited by Bosco99; 12-12-2014 at 11:07 AM.Reason: edit edit
Reply:Originally Posted by Bosco99Anyone opening a bottle/tank the full way is impropery trained! Period!2 twists of the wrist, maybe 3, to open. Your gauges will verify tank and line pressure.Come on ....do you turn your kitchen sink faucet on full blast to get a cup of water? Can you drink from a garden hose turned on full blast? Let alone the myriad of safety issues.
Reply:Originally Posted by SlobIn my case the two last questions posed the answer is yes as both the line pressure and flow rate are somewhat less than should be.In my opinion your first statement is grossly in error as safety is paramount when using any compressed gas whether it is a fuel gas, or inert in composition. I have seen much printed matter and had subsequent follow up with persons through conversations whom very much are journeyman status in the fields of welding, manufacturing, or industrial education whom seem to universally agree to what has been stated for the most part; 1/4 turn on the fuel gas, and fully open for the other gasses. In the example of a cutting torch setup the flow rate of an oxygen stream can be significatly reduced if the valve is partially opened. This of course with the use of a large cutting tip and probably wouldn't be noticable with a smaller tip.Now I really don't want to argue the point as again safety is paramount in this subject. How we take care of ourselves through safety practices denotes whether we go home at the end of the day.Thanks and no disrespect meant.
Reply:Edit edit editLast edited by Bosco99; 12-12-2014 at 11:08 AM.Reason: edit editOriginally Posted by Bosco99Dang....you serious? You light the acetlyene and check the pressure. You add the oxy, and check the pressure, you depress the oxy burn lever and check the pressure. It aint gonna change unless you run out of gas or clog the tip!Oxygen is an accelerent. It's more dangerous than fuel! You got big safety problems in your shop!
Reply:Originally Posted by InsanerideShould I open a propane tank for BBQ part way or all the way?  I learned to open Acety tanks 1/2 turn and hi pressure all the way and still do. Propane seems to be hi pressure but a fuel gas. I open them part way at this time.
Reply:You really need to be open minded and take a educational refresher course as your analogy's are incorrect, or border on hurting yourself or someone else due to unsafe practices.Sorry if that is offensive but it is the way I see it.SlobPurveyor of intimate unparalleled knowledge of nothing about everything.Oh yeah, also an unabashed internet "Troll" too.....
Reply:BD1, thats what I thought for propane, about 1/2 turn. Hi pressure needs or used to need to be backseated or fully open. Someone made a good point about oxy being partially open for quick shutdown but if it doesnt backseat, then what good would that be? Thanks.Slob, if that was meant for me then no offense taken, safety never hurts. I try to keep an open mind but for inert gases, whats the danger? For oxy, what if it doesnt backseat and leaks? That could be dangerous and makes me nervous.
Reply:Edit edit editLast edited by Bosco99; 12-12-2014 at 11:26 AM.Reason: edit edit
Reply:Originally Posted by Bosco99Maybe If I made up a list of equipment to put at the bottom of my posts I'd sound so much more knowledgeable. ...Happy Holidays!
Reply:Originally Posted by InsanerideBD1, thats what I thought for propane, about 1/2 turn. Hi pressure needs or used to need to be backseated or fully open. Someone made a good point about oxy being partially open for quick shutdown but if it doesnt backseat, then what good would that be? Thanks.Slob, if that was meant for me then no offense taken, safety never hurts. I try to keep an open mind but for inert gases, whats the danger? For oxy, what if it doesnt backseat and leaks? That could be dangerous and makes me nervous.
Reply:Edit edit editLast edited by Bosco99; 12-12-2014 at 11:27 AM.Reason: edit edit
Reply:BD1, thats nearly exactly what I do. I dont tip the gauges slightly up tho. Is that for better viewing? Also, I dont check for leaks but I will next time. I have two sets of VICTOR torches(Jr and Journeyman) with check valves. The acety gauge is VICTOR but my biggest danger is the Harberfrate Oxy gauge. It was about 1/4 price of VICTOR. I know, no excuse.
Reply:Originally Posted by SlobX2.I was always told 1/4 turn on acetylene or fuel gas cylinders, and all the way on oxygen or inert type gasses. This was for quick shut down in case of a blown regulator, severed hose, failed connection, etc.It is the practice I've always followed.
Reply:Originally Posted by Bosco99Edit edit edit
Reply:Originally Posted by shovelonDamn You! Spit coffee on my keyboard you jacknugget!
Reply:Was taught that high pressure valves on oxy, argon, and the like (not acetylene) have a special disc in the valve that in the event the valve were to suddenly rupture, that disc is made to burst and let the pressure of the tank release itself in at least a semi- controlled fashion, instead of 2200 psi releasing all at once, which could be catastrophic. In order for that disc to be properly engaged, the valve needs to be all the way open. Of course that was 10+ years ago. Not sure if they are different now.
Reply:Originally Posted by InsanerideBD1, thats what I thought for propane, about 1/2 turn. Hi pressure needs or used to need to be backseated or fully open. Someone made a good point about oxy being partially open for quick shutdown but if it doesnt backseat, then what good would that be? Thanks.Slob, if that was meant for me then no offense taken, safety never hurts. I try to keep an open mind but for inert gases, whats the danger? For oxy, what if it doesnt backseat and leaks? That could be dangerous and makes me nervous.
Reply:Originally Posted by Bosco99Whats next ....which foot is forward when you weld? Do you let your leads cross over each other? Do you like the welding cart on your left or right while welding? Jockeys or briefs while welding? .....jeesh
Reply:I've had a few acetylene bottles that leaked if I didn't open them all the way.  So with that and the contradicting answers to this thread, I'm unclear about how far to open an acetylene tank?  Aren't flashback arrestors supposed to deal with the hose fire issue?
Reply:Originally Posted by ccsI've had a few acetylene bottles that leaked if I didn't open them all the way.  So with that and the contradicting answers to this thread, I'm unclear about how far to open an acetylene tank?  Aren't flashback arrestors supposed to deal with the hose fire issue?
Reply:As usual old wifes tales gets repeat for ever. "I heard", "i was taught", "I knew a guy who heard", "I knew someone who thought he heard some one believe" etc etc.  Those with common sense should ask themselves: how come the acetylene valves should be opened a quarter turn (so it can be closed fast) but the oxygen valve needs to be opened all the way or it will leak? Doesn't that mean that the acetylene valve should leak as well since it's not opened all the way? And if the acetylene don't leak, why should the oxygen do it?BTW, all cylinders and fittings should be checked on a regular basis with soapy water/leak detector. That goes for acetylene, oxygen, argon, C25 etc.  They are all dangerous just in different ways.The ones who know how the valve works is those that manufactures the valves that goes on the cylinders. And Harrison is one of the largest suppliers of valves and they say it doesn't matter if you open it all the way or not (check earlier posts in the thread). Actually valves are made to certain standards, for instance by CGA in the US. If the valve is not broken, it is not leaking - closed, all the way open or somewhere in between.Last edited by Pete.S.; 12-13-2014 at 11:16 AM.
Reply:Pete.S., oxy is a higher pressure and back seats or seals better when opened all the way. It was said that newer valves dont need to open all the way but Im not changing my ways for everything I hear. My question was , should propane be open all the way as it seems to have hi pressure compared to acety. The answer was no. I only use propane for BBQ at this time.
Reply:As far as propane goes, we use LP forklifts at work, with "standard size" BBQ grille type tanks. Laid on their side, valve fully open or just a turn, it doesnt matter. If they leak, they were destined to leak whether shut or opened fully.
Reply:On page 20 of the VICTOR welding guide, it tells to open the oxy all the way to seal the valve packing. Makes common sense to me.http://www.scribd.com/doc/24433816/Welding-Guide
Reply:.From OSHA1910.253(b)(5)(iii)(K)    An acetylene cylinder valve shall not be opened more than one and one-half turns of the spindle, and preferably no more than three-fourths of a turn.
Reply:This from the University of Dayton    https://www.udayton.edu/facilities/e...ining_2011.pdfCylinder valves should be opened slowly. Oxygen cylinder valves should be opened all the way(see below).Open up the oxygen cylinder valve stem just a crack.Once the needle on the high pressure gauge has stopped, open up the valve all the way.This back-seats the valve.Oxygen cylinders must have the valve opened up all the way because of the high pressure in the cylinder.There is a back-seating valve on the oxygen cylinder.This prevents the high-pressure gas from leaking out through the threaded stem.
Reply:Propane gets a half turn like acetylene with me. Most soaps used by average people contain petrochemicals.Sent from my SCH-I545 using TapatalkCRIME SCENES, COURT DATES, FUNERALS, RIDING THROUGH THE CITY WITH A BITCH THAT IS JUST BEAUTIFUL IT'S JUST BUSINESS AS USUAL.
Reply:Most people do not wear a seat belt operating a forklift. Most employers don't care. Most people get away with it. I bet a lot of people's last thoughts were they wished they had it on.Sent from my SCH-I545 using TapatalkCRIME SCENES, COURT DATES, FUNERALS, RIDING THROUGH THE CITY WITH A BITCH THAT IS JUST BEAUTIFUL IT'S JUST BUSINESS AS USUAL.