The Mizoram Occupational Safety, Health and Working Conditions Rules, 2026
Schedule XXXVII
Official text
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(See rule 84)
WELDING/CUTTING OPERATION WITH THE USE OF LPG/ACETYLENE/ARGON
1. Applicability: This Schedule is applicable to all operations in welding/cutting of materials with the use
of Liquefied Petroleum Gas or Acetylene gas or Argon etc. with oxygen gas.
2. Equipment:
a) Gas cylinders whether filled of empty shall not be stored in rooms where welding or cutting work
is being done.
b) Liquefied gas cylinder, when is use shall always be kept in an upright position and shall be so
placed that they cannot be knocked over.
c) Open flames, lights, lighting of fire and smoking shall be prohibited in close proximity to any
cylinder containing flammable gases, except those which are in use for welding, cutting or heating.
d) All cylinders shall be stored at a safe distance of not less than 10 meters from all operations which
produce, flames, sparks of molten metal or result in excessive heat.
e) Every gas cylinder shall be provided with efficient standard type pressure regulator and back flow
of gas will be restricted by second non-return type valve.
f) All welding/cutting torches shall be of standard type which should be provided with non return
valve.
g) Suitable type of fire extinguishers shall be provided near the welding/cutting place and also near
the gas cylinder storage.
h) Pipe lines from gas cylinders shall be painted with distinctive colours for identification of each gas.
3. General:
a) Welding and cutting operation shall be prohibited in areas containing explosive of flammable
dusts, gases, oil or vapours.
b) Welding/cutting operations that are carried out in places where persons other than the welders
and their helpers are working or passing shall be enclosed by means of suitable stationary or
portable screens at least 2.13meters (7 ft.) in height.
c) All equipments like welding/cutting torch, pipe lines, brackets, non-return valves and pressure
regulators shall be examined by a competent person having know-how of such equipment, at least
once in a period of 15days.
d) The welding/cutting process shall be carried out by workers specially trained in that job and having
knowledge of the hazards of fire, back-fire and explosion.
e) A log book of examination of equipment and a register of trained workers for welding / cutting
operation shall be maintained in the forms as directed by the Inspector-cum- Facilitator.