Piping Codes and Standards
This Section of the Specification sets out the requirements of painting & colour codes on HVAC projects.GeneralOnly the best quality primers and paints shall be used. On special materials such as insulation the primer and paints shall be as recommended by the material manufacturer.
All items to be painted shall be first cleaned and prime coated.Over this the final colour shall be applied in two coats.The paint shall be gloss finish type.
On all non-metallic items, except insulation; the paint used shall be Acrylic Emulsion with mildew inhibitor additive.
Pipeline Colour Code
Compressors and Motors - Pale BlueSwitchboards and Control Panel - Hammer Finish Grey
Coolers and Condensers - White
Chilled and Condensing Water Pumps and Motors - Pale Blue
Fans and Air Handling Units - Pale Blue
Water Tanks - White
Piping
Chilled Water Supply Line - Dark BlueChilled Water Return Line - Light Blue
Condenser Water Supply line - Dark Green
Condenser Water Return line - Light Green
Drains and Wastes - Black
Cold Water and/or Cold Water Make Up - White
Electrical
Line or High Voltage Conduits - OrangeControl Conduit (24 Volts or Less) - Violet
Valve
All valves shall be painted as for the pipe except the handles.The handles shall be painted red regardless of service.
For valves 4" and larger the valve number shall be stencilled, on both sides of the valve.
For valves under 4" the number shall be die stamped into brass or aluminium tag not less than 2" diameter which shall be firmly fixed to the valve handle.
Miscellaneous
Pipe Hangers and Supports - BlackGrilles, Diffusers, Registers - Matt Black Internal prime coat grey external and final coats to colour nominated by the Architects.
Side Wall Exhausters - Prime coat in rust preventive paint, second coat flat grey, final coats to colour nominated by the Architects.
Roof Ventilators - If copper oxidize, if aluminium unpainted, if other materials, aluminium bitumasitc paint in two coats.
Pipe and other items exposed - Two coats of aluminium to weather bitumsatic paint
Direction Arrow
Directional Arrows shall be in black.Directional Arrows shall be painted on two visible sides of all piping, except drains in black at 6 inch centres.