Tom’s Welding Pages

6 Янв 2015 | Author: | Комментарии к записи Tom’s Welding Pages отключены
GAS GAS MC 125

Gas Bottles for Welding

A good is to buy the biggest bottle you can put up with handle.

Be sure and secure it so it fall over.

The business of used tanks is a true pit. Many tanks are in leased, which means they are owned by the company them and cannot be sold to else. If you did buy such tanks typically are marked by the companies stamped into the metal) and try to get filled, they quite would be confiscated.

Beware of about getting bottles which vary from to state and from company to


If the bottles have no such they are your property and in at least, any company will them (in truth they swap them for a full In theory you are responsible to keep in hydro and fix problems with the but since you are exchanging them, is not an issue, unless you don’t use it for a time and it requires a hydro This will cost you an $25 or so.

Here are some more about figuring out whether you to buy a used set of bottles. Carefully the neck ring and the area on the near the neck. If they are property of acme welding do not buy them.

If it is a company you have heard of, just call local welding supply and ask them. For example, Union is found on some tanks, but are no longer in the welding gas business and a tank could be owned by an

Also look at the ICC number. A will typically have a like: DOT 3AA 2265 The number indicates that the tank is for 2265 PSI, i.e. it is a rating, but it turns out that the in my area use this as a guide to leased tanks. Apparently 2265 and 2400 psi rated tanks are leased tanks not all).

These will typically have ownership markings.

ICC — good, almost an owner bottle

ICC 2015 good, almost certainly an bottle

ICC 2265 — probably a leased bottle.

ICC — bad, probably a bottle.

The other issue bottles is the hydro test. must be tested and certified 5 or 10 years and are stamped with the and year of each test. If the for the year are followed by a star (or a the test is good for 10 years; if it is good for 5 years, so:

9 — 07 in September 2007, good 2012

9 — 07* tested in 2007, good till

Bottle sizes

This is a and unduly complex topic I am only beginning to unravel. It seem that bottles may be to as size 4 oxygen as given by the table, but old nomenclature (such as MC and B for persists.

Rumor has it that the B size tank gets the B for bus, and the MC acetylene tanks gets the MC for and this dates back to they used the gas for headlights. The data also applies, but I had only limited success it with the above graphics. MC holds 10CF and B holds

Standard oxygen cylinder

Standard acetylene cylinder

Safety with Acetylene

is an important issue with bottle safety (actually are many safety concerns, a look at this safety from the Air Products website.)

use the bottle with it on its side, as may force acetone into the and torch. Also, never acetylene pressures above 15 Gaseous acetylene at pressures 15 psi will begin to dissasociate, heat and possible explosion.

a fire extinguisher handy is a idea.

Acetylene tanks have plugs designed to melt and pressure at temperatures over 212 F.

if you draw acetylene at too fast a the bottle can overheat and explode. The rule of thumb I heard for was 1/7 of the bottle capacity per hour. this is a big issue with bottles.

More recently I the recommendation of limiting the withdrawal to 1/10 of the cylinder capacity per in intermittent use and 1/15 of the cylinder per hour in continuous use.

my tiny MCbottle (10 CF capacity), over 1 CF per hour would be (i.e. any use that drains the in less than 10 hours be inadvisable). What this is that any use other than a few use here and there would not be a idea. Here are some related facts, with the recommendations based on the 1/7 rule:

0 welding tip uses 1.7 CFH (need a 12 CF

Size 2 welding tip uses 3.0 CFH a 21 CF bottle)

Size 4 welding tip uses 3.0 CFH a 21 CF bottle)

Size 0 cutting tip 7.5 CFH (need a 53 CF bottle)

Size 2 tip uses 10.5 CFH (need a 74 CF

Size 4 cutting tip uses 13 CFH a 91 CF bottle)

Once conclusion can immediately be drawn from the table is that there is no way to do cutting with an MC size acetylene bottle. A size B bottle would be marginal a size 0 cutting tip.

My

I have a little portable rig. As near as I can tell it has an MC (10CF) acetylene bottle pounds) along with a oxygen bottle (13 pounds). A match given that you use oxygen at twice the rate as

And the pair of botles weighs pounds, very portable.

To my 10CF acetylene bottle to a (size B) acetylene bottle cost me $56.39 (in early but I might find that the thread size changes and I then need an adapter. bottle weighs 25.5

To upgrade my 20CF oxygen to a 55 CF size would cost me The next size (80CF) be more suitable (having the volume as the acetylene bottle it is with), but would also 53 pounds instead of 25 pounds.

The 40CF acetylene paired the 55 CF oxygen would weigh pounds. Have any comments? Drop me a line!

Tom’s pages / tom@mmto.org

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