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WELDER - CITS


           Colour coding for different gas cylinders, safe handling
           and storage


           Objectives : At the end of this lesson you shall be able to
           •   identify different gas cylinders
           •  state the cylinder safe handling and storage.



           Introduction -  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)

           Identification of gas cylinders
               Name of gas            Cylinder Colour            codling Valve threads
               Oxygen                 Black                      Right- hand
               Acetylene              Maroon                     Left- hand

               Coal                   Red (With name coal gas)   Left-hand
               Hydrogen               Red                        Left-hand
               Nitrogen               Grey(With                  Right-hand
                                      Black neck)

               Air                    Grey                       Right-hand
               Propane                RED(with                   Left-hand
                                      Larger diameter
                                      And name propane)
               Argon                  Blue                       Right-hand
               Carbon-di-Oxide        Black (With white neck)    Right-hand

           Oxygen & acetylene cylinder  safe handling and storage
           1  Make sure you have received the necessary training, including WHMIS. Only trained workers are allowed to
              handle compressed gases.
           2  Do  not  smoke  in  compressed  gas  storage  areas  (indoors  or  outdoors).  Note  that  oxygen  alone  will  not
              combust, but it will vigorously support and accelerate combustion, causing flammable materials to burn with
              great intensity. Oil or grease in the presence of oxygen can ignite readily and burn violently.
           3  Wear the required (if any) personal protective equipment (PPE) and use only the appropriate equipment (e.g.,
              carts, tools, fittings, and equipment).
           4  Before using or storing the cylinders, make sure they are properly identified or labelled and that they are in
              good condition. For cylinders that are not in good condition place a warning label on it, and report it to the
              supervisor to have it removed from service.
           5  Store cylinders in a clearly identified, dry, well-ventilated storage area that is not exposed to heat or the direct
              rays of the sun, and away from doorways, aisles, elevators, gangways, stairs, electrical outlets, etc.
           6  Identify empty cylinders with a tag and store them separately from full cylinders. Store cylinders, both empty
              and full, in the upright position (unless otherwise instructed).

           7  During storage, close the cylinder valves with the protective caps or a specific protective device in place.
           8  Secure cylinders with an insulated chain or non-conductive belt to protect cylinders from falling or becoming
              damaged.





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