These requirements cover oxy-fuel gas torches used in operations such as welding@ cutting@ heating@ scarfing@ powder cutting@ or other allied processes. These requirements do not apply to torches in which the fuel gas aspirates atmospheric air or to metal-spraying torches. A product that contains features@ characteristics@ components@ materials@ or systems new or different from those covered by the requirements in this standard@ and that involves a risk of fire or of electric shock or injury to persons shall be evaluated using appropriate additional component and end-product requirements to maintain the level of safety as originally anticipated by the intent of this standard. A product whose features@ characteristics@ components@ materials@ or systems conflict with specific requirements or provisions of this standard does not comply with this standard. Revision of requirements shall be proposed and adopted in conformance with the methods employed for development@ revision@ and implementation of this standard.