.-(1)(a) A cylinder exposed to fire shall not be used unless it has undergone proper examination and hydrostatic test or hydrostatic stretch test.(b)If deleterious structural changes in the material due to the action of heat of the fire is apprehended to have taken place, the cylinder shall have to be subjected to proper heat treatment, followed by hydrostatic test or hydrostatic stretch test, as the case may be, before the cylinder is taken into use.(2)Dissolved acetylene cylinders, which have been damaged by fire shall be condemned and destroyed by an experienced and competent person.
