18-28-1101.5 Signage – General.
   Every refrigeration system, containing over 100 pounds (45.36 kg) of refrigerant, must have posted as near as practicable to the pressure imposing element of such system a sign having letters not less than 1 inch in height with the wording:
 
HIGH PRESSURE REFRIGERANT – DANGER

UN REFRIGERANTE DE ALTA PRESION – PELIGRO
 
   All refrigeration piping shall be coded at 30 foot (9.144 m) intervals and in every separate area through which the piping extends. A permanent means of identification shall be affixed, having a yellow background and black letters legible from the work floor, dimensioned according to the table below and with the following wording:
 
HIGH PRESSURE REFRIGERANT – DANGER UN REFRIGERANTE DE ALTA PRESION – PELIGRO
 
Pipe Labeling
 
Outer Diameter of Pipe Covering or Lagging
(In Inches)
Letter Heights
(In Inches)
3/4 to 1 1/4
1/2
1 1/2 to 2
3/4
2 1/2 to 8
1 1/4
8 1/4 to 10
2 1/2
Over 10
3 1/2
 
   The background of the sign shall be yellow, with black letters.