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Old August 13th, 2013, 02:10 PM   #21
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Originally Posted by cameron69 View Post
If propane is only gas, why is it called LPG (Liquefied petroleum gas, also called LPG, GPL, LP Gas, liquid petroleum gas or simply propane or butane)
see you learned two things today!
Sarcasm....
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Old August 13th, 2013, 02:12 PM   #22
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I will reword that.

When you get a portable acetylene bottle it is not liquid filled. When they fill them I'm sure it is from a large liquid tank just like argon and most other gasses.
I doubt that's the case for Acetylene. I thought anything over 15psi and it makes a mess. Then again I was just an office jockey so I don't really know anything.
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Old August 13th, 2013, 04:07 PM   #23
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I doubt that's the case for Acetylene. I thought anything over 15psi and it makes a mess. Then again I was just an office jockey so I don't really know anything.
Anything over 15 psi? Whatchu talkin bout Willis?
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Old August 13th, 2013, 04:21 PM   #24
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Anything over 15 psi? Whatchu talkin bout Willis?
It'll explode nigga.

Not the tank from what I understand, sounds more like shoots fireballs?
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Old August 13th, 2013, 05:14 PM   #25
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Acetylene makes better trash bag bombs.
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Old August 13th, 2013, 07:40 PM   #26
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It'll explode nigga.

Not the tank from what I understand, sounds more like shoots fireballs?
I'm confused.....

I have used torches on a very regular basis for the last 12 years and I have never experienced any of the bs that ya'll are talking. I think you guys need to read less and do more.
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Old August 13th, 2013, 07:59 PM   #27
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I'm confused.....

I have used torches on a very regular basis for the last 12 years and I have never experienced any of the bs that ya'll are talking. I think you guys need to read less and do more.
Something like explosive decompression?

If it vents at 15 psi or greater, it becomes unstable and can potentially explode.
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Old August 13th, 2013, 08:04 PM   #28
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Something like explosive decompression?

If it vents at 15 psi or greater, it becomes unstable and can potentially explode.
It may be possible but is so highly unlikely that it never actually happens. When I get home I will put a regulator on the acetylene bottle in the back of my truck and crank it up to 20 and see if it spits flame balls.
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Old August 13th, 2013, 08:05 PM   #29
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Like I said

Read less, do more.
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Old August 13th, 2013, 08:15 PM   #30
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Well I'm very disappointed. I took the top off a bottle and opened the valve with no regulator on it and I got no flames :-(
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Old August 13th, 2013, 08:18 PM   #31
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Well I'm very disappointed. I took the top off a bottle and opened the valve with no regulator on it and I got no flames :-(
Try putting 20 psi in a pop bottle (it would probably be best if you didn't).
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Old August 16th, 2013, 10:09 AM   #32
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http://weldingweb.com/archive/index.php/t-836.html

good read on acetylene.
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Old August 16th, 2013, 10:16 AM   #33
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It must be the fact that acetylene is a liquid bottle unlike propane which is only gas. I guess I learn something new everyday!
do you know what LP stands for?
Liquid Propane... ever see a condensation line on a propane tank, it forms on the out side of the tank but only where the propane is still liquid form on the inside.
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Old August 16th, 2013, 10:52 AM   #34
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Propane doesn't work too well, MAPP gas is slightly better.


Just cuz you haz propane tanks shouldn't mean you need to use them. Trade em in on acetylene and get some big boy torches.
I politely disagree. I have been using propane/oxygen for at least 20 years and I do just fine. My 100# cylinder of propane lasts about 3-5 years so all you have to do is buy oxygen most of the time. When using propane on a torch, you must install propane tips or the torch will not work worth a damn. My setup will comfortably cut 1"+ thick steel and has been used to scrap lots of steel over the years. Definatly a way to save money if you do a lot of cutting.
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Old August 16th, 2013, 11:12 AM   #35
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I politely disagree. I have been using propane/oxygen for at least 20 years and I do just fine. My 100# cylinder of propane lasts about 3-5 years so all you have to do is buy oxygen most of the time. When using propane on a torch, you must install propane tips or the torch will not work worth a damn. My setup will comfortably cut 1"+ thick steel and has been used to scrap lots of steel over the years. Definatly a way to save money if you do a lot of cutting.
This is where I fucked up then.
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Old August 16th, 2013, 11:14 AM   #36
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I politely disagree. I have been using propane/oxygen for at least 20 years and I do just fine. My 100# cylinder of propane lasts about 3-5 years so all you have to do is buy oxygen most of the time. When using propane on a torch, you must install propane tips or the torch will not work worth a damn. My setup will comfortably cut 1"+ thick steel and has been used to scrap lots of steel over the years. Definatly a way to save money if you do a lot of cutting.
The convenience of propane is nice too. I have 2 30# (?) Tanks i found on the side of the road, both appear to hold pressure. That way i only need to purchase oxygen tanks...
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Old August 16th, 2013, 11:20 AM   #37
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Sarcasm....

Quote:
Originally Posted by swampjeep View Post
do you know what LP stands for?
Liquid Propane... ever see a condensation line on a propane tank, it forms on the out side of the tank but only where the propane is still liquid form on the inside.
Really.....

Yes, I know propane is a liquid. Propane is also a refrigerant just like ammonia or freon. I understand how refrigerants work pretty well since that is what I do for a living.
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Old August 16th, 2013, 11:22 AM   #38
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Here is the DOT Hazmat on acetylene
If this helps your discussion.
TITLE 49--TRANSPORTATION

CHAPTER I--PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION,
DEPARTMENT OF TRANSPORTATION

PART 173_SHIPPERS_GENERAL REQUIREMENTS FOR SHIPMENTS AND PACKAGINGS--
Table of Contents

Subpart G_Gases; Preparation and Packaging

Sec. 173.303 Charging of cylinders with compressed gas in solution
(acetylene).

(a) Cylinder, filler and solvent requirements. (Refer to applicable
parts of Specification 8 and 8AL). Acetylene gas must be shipped in
Specification 8 or 8AL cylinders (Sec. 178.59 or Sec. 178.60 of this
subchapter). The cylinders shall consist of metal shells filled with a
porous material, and this material must be charged with a suitable
solvent. The cylinders containing the porous material and solvent shall
be successfully tested in accordance with CGA C-12 (IBR, see Sec. 171.7
of this subchapter). Representative samples of cylinders charged with
acetylene must be successfully tested in accordance with CGA C-12.
(b) Filling limits. For DOT specification cylinders, the pressure in
the cylinder containing acetylene gas may not exceed 250 psig at 70
[deg]F. If cylinders are marked for a lower allowable charging pressure
at 70 [deg]F., that pressure must not be exceeded. For UN cylinders, the
pressure in the cylinder may not exceed the limits specified in Sec.
173.304b(b)(2).
(c) Data requirements on filler and solvent. Cylinders containing
acetylene gas must not be shipped unless they were charged by or with
the consent of the owner, and by a person, firm, or company having
possession of complete information as to the nature of the porous
filling, the kind and quantity of solvent in the cylinders, and the
meaning of such markings on the cylinders as are prescribed by the
Department's

[[Page 604]]

regulations and specifications applying to containers for the
transportation of acetylene gas.
(d) Verification of container pressure. (1) Each day, the pressure
in a container representative of that day's compression must be checked
by the charging plant after the container has cooled to a settled
temperature and a record of this test kept for at least 30 days.
(e) Prefill requirements. Before each filling of an acetylene
cylinder, the person filling the cylinder must visually inspect the
outside of the cylinder in accordance with the prefill requirements
contained in CGA C-13, Section 3 (IBR, see Sec. 171.7 of this
subchapter).
(f) UN cylinders. (1) UN cylinders and bundles of cylinders are
authorized for the transport of acetylene gas as specified in this
section. Each UN acetylene cylinder must conform to ISO 3807-2 (IBR, see
Sec. 171.7 of this subchapter), have a homogeneous monolithic porous
mass filler and be charged with acetone or a suitable solvent as
specified in the standard. UN acetylene cylinders must have a minimum
test pressure of 52 bar and may be filled up to the pressure limits
specified in ISO 3807-2. The use of UN tubes and MEGCs is not
authorized.
(2) UN cylinders equipped with pressure relief devices or that are
manifolded together must be transported upright.

[29 FR 18743, Dec. 29, 1964. Redesignated at 32 FR 5606, Apr. 5, 1967]

Editorial Note: For Federal Register citations affecting Sec.
173.303, see the List of CFR Sections Affected which appears in the
Finding Aids section of the printed volume and on GPO Access.
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Old August 16th, 2013, 02:46 PM   #39
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My old acetylene tanks had a semi-permeable rock in it and there was acetone in it. In other words, the gas took forever to escape through the rock out the valve so you didn't have to worry about a catastrophic explosion if some idiot busted off the valve. I don't know if this is true anymore. If you want to fool around with acetylene it's a lot of fun. Don't breathe the black shit, it will make you sick.

I have a 30lb propane tank I've been using to cut for almost a decade. It's so old it still has the not-retard proof valve on it.

I do miss the acetylene but I'm cheap. 30lb cylinder of propane costs about $6 to fill. Acetylene tanks last time I did it was around $60 for 150cf. I think the last time I got oxygen I paid $18.
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Old August 16th, 2013, 09:41 PM   #40
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Y
I have a 30lb propane tank I've been using to cut for almost a decade. It's so old it still has the not-retard proof valve on it.

I do miss the acetylene but I'm cheap. 30lb cylinder of propane costs about $6 to fill .
I can tell its been ten years your in for a shock next fill. The wife said seventeen dollars for a 30 pounder fill.
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