You need to look at NFPA 13 for above gound piping and NFPA 11 for undergound piping. If you are out buying NFPA books you may want NFPA 30 and NFPA 35 while you are at it. They deal with flamable liquid handling.
NFPA 11 Standard for Low-, Medium-, and High-Expansion Foam 2002 Edition
NFPA 11A Standard for Medium- and High-Expansion Foam Systems 1999 Edition
NFPA 12 Standard on Carbon Dioxide Extinguishing Systems 2000 Edition
NFPA 12A Standard on Halon 1301 Fire Extinguishing Systems 1997 Edition
NFPA 13 Standard for the Installation of Sprinkler Systems 2002 Edition
NFPA 13D Standard for the Installation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes 2002 Edition
NFPA 13E Recommended Practice for Fire Department Operations in Properties Protected by Sprinkler and Standpipe Systems 2000 Edition
NFPA 13R Standard for the Installation of Sprinkler Systems in Residential Occupancies up to and Including Four Stories in Height 2002 Edition
NFPA 14 Standard for the Installation of Standpipe, Private Hydrant, and Hose Systems 2000 Edition
NFPA 15 Standard for Water Spray Fixed Systems for Fire Protection 2001 Edition
NFPA 16 Standard for the Installation of Foam-Water Sprinkler and Foam-Water Spray Systems 1999 Edition
NFPA 17 Standard for Dry Chemical Extinguishing Systems 2002 Edition
NFPA 17A Standard for Wet Chemical Extinguishing Systems 2002 Edition
NFPA 18 Standard on Wetting Agents 1995 Edition
NFPA 20 Standard for the Installation of Stationary Pumps for Fire Protection 1999 Edition
