1 Scope

1.1 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.

1.2 "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.

1.3 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:

ANSI/NFPA 30-1996, Flammable and Combustible Liquids Code;

ANSI/NFPA 31-1997, Standard for the Installation of Oil-Burning Equipment;

ANSI/NFPA 32-1996, Standard for Drycleaning Plants;

ANSI/NFPA 51-1997, Standard for the Design and Installation of Oxygen-Fuel Gas Systems for Welding, Cutting, and Allied Processes;

ANSI/NFPA 54-1999, National Fuel Gas Code AGA Z223.1-1999;

ANSI/NFPA 58-1998, Liquefied Petroleum Gas Code; and

pertaining to the installation of fire-protection systems, such as:

ANSI/NFPA 11-1998, Standard for Low-Expansion Foam;

ANSI/NFPA 12-2000, Standard on Carbon Dioxide Extinguishing Systems;

ANSI/NFPA 13-1999, Installation of Sprinkler Systems;

ANSI/NFPA 14-2000, Standard for the Installation of Standpipe, Private Hydrant, and Hose Systems;

ANSI/NFPA 15-1996, Standard for Water Spray Fixed Systems for Fire Protection;

ANSI/NFPA 16-1999, Standard for the Installation of Deluge Foam-Water Sprinkler and Foam-Water Spray Systems;

ANSI/NFPA 17-1998, Standard for Dry Chemical Extinguishing Systems;

ANSI/NFPA 20-1999, Standard for the Installation of Stationary Pumps for Fire Protection;

ANSI/NFPA 22-1998, Standard for Water Tanks for Private Fire Protection;

ANSI/NFPA 24-1995, Standard for the Installation of Private Fire Service Mains and Their Appurtenances;