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F. Gas Safety Valves: Gas safety valve latched open when energized, free handle design,
manual reset, and a visual position indicator.
PART 3 – EXECUTION
3.01 INSPECTION:
A. General: Examine areas and conditions under which natural gas systems materials and
products are to be installed. Do not proceed with work until unsatisfactory conditions have
been corrected in a manner acceptable to the Installer.
3.02 PREPARATION:
A. Precautions: Before turning off the gas to the premises or section of piping, turn off all
equipment valves. Perform a leakage test as specified in "FIELD QUALITY CONTROL"
below, to determine that all equipment is turned off in the piping section to be affected.
B. Conform with the requirements in NFPA 54 for the prevention of accidental ignition.
3.03 INSTALLATION OF PIPE:
A. Install natural gas piping in accordance with Division 23, Section 232113.
B. Conform to the requirements of NFPA 54, National Fuel Gas Code.
C. Locations and Arrangements: Drawings (plans, schematics, and diagrams) indicate the
general location and arrangement of piping systems. Design locations and arrangements
of piping take into consideration pipe sizing, flow direction, slope of pipe, expansion, and
other design considerations. So far as practical, install piping as indicated.
D. Concealed Locations: Except as specified below, install concealed gas piping in an airtight
conduit constructed of Schedule 40, seamless black steel with welded joints. Vent
conduit to the outside and terminate with a screened vent cap.
1. Above-Ceiling Locations: Gas piping may be installed in accessible above-ceiling
spaces (subject to the approval of the authority having jurisdiction), whether or not
such spaces are used as a plenum. Valves shall not be located in such spaces.
2. In Floors: Piping installed in floors shall have protective wrapping specified in Part
2 above. Piping cast in concrete slabs shall be surrounded with a minimum of 1-
1/2 inches of concrete and shall not be in physical contact with other metallic
structures such as reinforcing rods or electrically neutral conductors. Piping shall
not be embedded in concrete slabs containing quick-set additives or cinder
aggregate.
3. Piping In Partitions: Concealed piping shall not be located in solid partitions.
Tubing shall not be run inside hollow walls or partitions unless protected against
physical damage. This does not apply to tubing passing through walls or
partitions.
4. Prohibited Locations: Do not install gas piping in or through a circulating air duct,
clothes chute, chimney or gas vent, ventilating duct or dumb waiter or elevator
shaft. This does not apply to accessible above-ceiling space specified above.
Project No.: 10145
550 15 th Street Dual Brand Hotel
03/16/2012
23 1123 - 5 FACILITY NATURAL-GAS PIPING