Page 81 - CITS - Welder - Trade Theory

WELDER - CITS

Fig 1

Fig 2 Fig 3

Oxygen and Acetylene gas cylinders-charging methods

Objectives : At the end of this lesson you shall be able to
• explain the oxygen gen cylinder charging method.
• explain the acetylene gen cylinder charging method.

Oxygen gas cylinder- charging methods

Definition of a gas cylinder: It is a steel container, used to store different gases at high pressure safely and in
large quantity for welding or other industrial uses.
Types and identifications of gas cylinders: Gas cylinders are called by names of the gas they are holding.
(Table 1) Gas cylinders are identified by their body colour marks and valve threads. (Table 1) The oxygen cylinder
safe filled with oxygen gas under a pressure of 120-140kg/cm2.The cylinders are tested regularity and periodically.
They are annealed to relieve stresses caused during ‘on the job’ handling. They are periodically cleaned using
caustic solution. It is a steel container, used to store different gases at high pressure safely and in large quantity
for welding or other industrial uses. It is a seamless steel container used to store oxygen gas safely and in large
quantity under a maximum pressure of 140 kg /cm2, for use in gas welding and cutting.
It is made from seamless solid drawn steel and tested with a water pressure of 225kg/cm2. The cylinder top
is fitted with a high pressure valve made from high quality forged bronze. (Fig 2) The cylinder valve has a

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CITS : C G & M - Welder - Lesson 14-26 CITS : C G & M - Welder - Lesson 14-26