23 20 05 Process Piping 23 00 01 Mechanical Contractors 22 00 01 Plumbing Contractor 05 12 40 Steel Erection 07 60 01 Sheet Metal Contractors 01 54 03 Millwrighting
CSI Codes : 01 54 00 Construction Aids, 05 12 00 Structural Steel Framing, 07 60 00 Flashing and Sheet Metal, 22 00 00 Plumbing, 23 00 00 Heating, Ventilating and Air Conditioning (HVAC), 23 20 00 HVAC Piping and Pumps