"These requirements cover pipe unions to be employed in piping carrying designated flammable or combustible fluids or in piping connections to equipment supplying water for fire-protection service. ""Flammable and Combustible Fluids@"" as used herein@ means gases and liquids that are investigated and found to be flammable or combustible@ such as acetylene@ fuel oil@ gasoline@ kerosene@ liquefied petroleum gas@ and manufactured and natural fuel gases. Requirements for the installation and use of the pipe unions covered by these requirements are included in the Standards of the National Fire Protection Association pertaining to storage and use of flammable and combustible fluids@ such as: ANSVNFPA 30-1 996@ Flammable and Combustible Liquids Code; ANSVNFPA 31-1 997@ Standard for the Installation of Oil-Burning Equipment; ANSVNFPA 32-1 996@ Standard for Drycleaning Plants; ANSVNFPA 51-1997@ Standard for the Design and Installation of Oxygen-Fuel Gas Systems for Welding@ Cutting@ and Allied Processes; ANSVNFPA 54-1999@ National Fuel Gas Code AGA 2223.1-1999; ANSVNFPA 58-1 998@ Liquefied Petroleum Gas Code; and pertaining to the installation of fire-protection systems@ such as: ANSVNFPA 11-1 998@ Standard for Low-Expansion Foam; ANSVNFPA 12-2000@ Standard on Carbon Dioxide Extinguishing Systems; ANSVNFPA 13-1 999@ Installation of Sprinkler Systems; ANSVNFPA 14-2000@ Standard for the Installation of Standpipe@ Private Hydrant@ and Hose Systems; ANSVNFPA 15-1 996@ Standard for Water Spray Fixed Systems for Fire Protection; ANSVNFPA 16-1 999@ Standard for the Installation of Deluge Foam-Water Sprinkler and Foam- Water Spray Systems; ANSVNFPA 17-1 998@ Standard for Dry Chemical Extinguishing Systems; ANSVNFPA 20-1 999@ Standard for the Installation of Stationary Pumps for Fire Protection; ANSVNFPA 22-1 998@ Standard for Water Tanks for Private Fire Protection; ANSVNFPA 24-1995@ Standard for the Installation of Private Fire Service Mains and Their Appurtenances; 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."