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GAS SUPPLIES AND GAS DISTRIBUTION SYSTEM ARGON- CARBON DIOXIDE MIXTURE Product name

Formula

Unimix

Hazard class

Ar - CO2 (80%/20%)

Nonflammable gas

Appearance and colour

IMDG code

Colourless, odourless gas

2.2

Specific gravity (Air=1)

Substance Identification

1.40 (heavier than air)

UN-1956

Cylinder characteristics

Colour code: Body – Grey/Yellow Cylinder Outlet Size Connection

Nominal Filled Pressure Nominal Approx.

Approx.

Contents (bar) at 15ºC Wt. Of Gas Dimensions Cylinder Wt. (cu. Metres) (max) (kg) (mm) (kg) (See note 1.)

(See note 1.) (See note 2.) (See note 3.)

M-10

W24.32mm x 1/14”

2.2

200

3.4

140 x 1000

18

M-50

W24.32mm x 1/14”

10.9

200

17.1

230 x 1690

81

Note:

1. Actual contents and weight of gas in individual cylinders will vary about the nominal contents and weight of gas indicated. 2. The length includes an allowance of 70mm for a top outlet valve. 3. The approximate cylinder weight includes cylinder, valve and neck-ring. The approximate weight of a full cylinder is obtained by adding the nominal weight of contained gas to this figure. Greater weights may be found among cylinders manufactured to older standards. ARGON-CARBON DIOXIDE MIXTURES ARGON-CARBON DIOXIDE MIXTURE (UNIMIX) is a mixture of 80% argon and 20% Carbon Dioxide, which is used as a shielding gas in the MIG/MAG welding process. The mixture is suitable for welding all un- and low alloyed carbon steels. The mixture gives a very stable molten pool together with optimum energy-transmission. The mixture is relative inert in its chemical properties and is non toxic. Because the gas mixture is heavier than air, it will collect in confined and low areas. The result will be that the Oxygen level is reduced which can be a potential hazard. More on the effect of exposure to Oxygen deficient atmospheres can found on the next pages describing Oxygen. In general it can be said that when working with compressed gases, you should work in a well ventilated area.

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