National Fire Protection Association (NFPA). 2001 Edition. It was issued by the Standards Council on July 13, 2001, with an effective date of August 2, 2001, and supersedes all previous editions. This edition of NFPA 15 was approved as an American National Standard on August 2, 2001. 129 p. This standard provides the minimum requirements for the design, installation, and system acceptance testing of water spray fixed systems for fire protection service and the minimum requirements for the periodic testing and maintenance of ultra high-speed water spray fixed systems.