œ Water for heating and cooling
œ Condensing water
œ Steam or other condensate
œ Compressed air and other nontoxic and nonflammable gases
This code places size and thickness limitations on the piping made of different materials. The requirements of this code shall apply to the piping of up to and including those sizes and thicknesses. These limitations are as follows:
œ Carbon steel: NPS 30 (DN 750) in O.D. and 0.500 in (12.7 mm) wall
œ Stainless steel: NPS 12 (DN 300) and 0.500 in (12.7 mm) wall
œ Aluminum: NPS 12 (DN 300)
œ Brass and copper: NPS 12 (DN 300) (12.125 in or 308 mm O.D. for copper tubing)
œ Thermoplastics: NPS 14 (DN 350)
œ Ductile iron: NPS 18 (DN 450)
œ Reinforced thermosetting resin: NPS 14 (DN 350)
Piping made of other materials permitted by this code may also be used for building services.
The piping within the working pressure or temperature limits shown in Table A shall be designed and constructed in compliance with the requirements of ASME B31.9.