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1/10 Acetylene withdrawal rule.
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<blockquote data-quote="504RP" data-source="post: 1802770" data-attributes="member: 40335"><p>Rosebuds use a lot more gas at a faster rate and on a smaller bottle around 145 cubic feet volume especially if that bottle has been used enough where it isn't completely full. You can start pulling acetone out and create blow backs. </p><p></p><p>I was going to put flashback arrestors on my torch and bottles like you have. And am probably do it. The only reason I haven't yet is because I read that when you use flashback arrestors they some how restrict the flow and according to the acetylene cutting tip chart you are supposed to increase the gas psi by 25 %. </p><p></p><p>Using 145 cubic foot bottles that extra 25% adds to the withdrawal rate on the 1/10 rule. Drains the bottle a little faster. I almost just bought a 350 cubic foot bottle instead of the 145 when I went to get a refill but it have taken me forever to use that much gas no more cutting than I do. But with a 350 cf bottle I wouldn't had to worry about exceeding the 1/10 withdrawal rate. Nor if I were to use a rosebud which I use from time to time and adding the extra 25% to compensate for using flash back arrestors. </p><p></p><p>Am going to look into a tank manifold to where I could maybe use two 145 bottles for the time's I might need to cut a lot 1/2 to 1 inch metal. That way I could use that much gas up in a reasonable amount of time and not having it sit around for months at a time. But actually there's not a whole lot of difference between using two 145 cf bottles versus one 350 cf. Just 60 cf.</p></blockquote><p></p>
[QUOTE="504RP, post: 1802770, member: 40335"] Rosebuds use a lot more gas at a faster rate and on a smaller bottle around 145 cubic feet volume especially if that bottle has been used enough where it isn’t completely full. You can start pulling acetone out and create blow backs. I was going to put flashback arrestors on my torch and bottles like you have. And am probably do it. The only reason I haven’t yet is because I read that when you use flashback arrestors they some how restrict the flow and according to the acetylene cutting tip chart you are supposed to increase the gas psi by 25 %. Using 145 cubic foot bottles that extra 25% adds to the withdrawal rate on the 1/10 rule. Drains the bottle a little faster. I almost just bought a 350 cubic foot bottle instead of the 145 when I went to get a refill but it have taken me forever to use that much gas no more cutting than I do. But with a 350 cf bottle I wouldn’t had to worry about exceeding the 1/10 withdrawal rate. Nor if I were to use a rosebud which I use from time to time and adding the extra 25% to compensate for using flash back arrestors. Am going to look into a tank manifold to where I could maybe use two 145 bottles for the time’s I might need to cut a lot 1/2 to 1 inch metal. That way I could use that much gas up in a reasonable amount of time and not having it sit around for months at a time. But actually there’s not a whole lot of difference between using two 145 cf bottles versus one 350 cf. Just 60 cf. [/QUOTE]
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