313.3.3 Piping.
MC § 313.3.3
Equipment piping shall be installed as follows: 1. Metal piping connected to power driven equipment shall be resiliently supported from or on the building structure for a distance of 50 pipe diameters from the power driven equipment. The resilient isolators shall have a minimum static deflection of 1 inch (25.4 mm) for all piping with a 4 inch (101.6 mm) or larger in actual outside diameter and 1/2 inch (12.7 mm) for piping with less than 4 inches (101.6 mm) in actual outside diameter. Piping connected to fluid pressure-reducing valves shall be resiliently isolated for a distance of 50 pipe diameters from pressure-reducing valves and isolators shall provide a minimum static deflection of 1/2 inch (12.7 mm).
2.Equipment such as heat exchangers, absorption refrigeration machines, or similar equipment, that is located on any floor or roof other than a floor on grade, and that is not power driven but is connected by metal piping to power driven equipment, shall be resiliently supported from or on the building structure, for a distance of 50 pipe diameters from the power driven equipment. The resilient supports shall be vibration isolators having a minimum static deflection of 1 inch (25.4 mm) and shall incorporate approved resilient pads having a minimum thickness of 1/4 inch (6.4 mm).
