A Pipe Schedule is a detailed table specifying all piping components, including diameters, materials, pressure ratings, and insulation requirements for hydronic HVAC systems. This schedule provides essential sizing and specification data for pipe fabrication, installation, and system operation. Pipe schedules are referenced on mechanical plans and coordinated with equipment specifications.
Schedule Specifications
Pipe schedules identify each piping section with designations from mechanical plans and list nominal pipe diameter (1/2 inch to 4 inches or larger), material type (copper, steel, or PEX), wall thickness, pressure rating (typically 150 to 300 PSI), and flow rates (GPM). Insulation thickness, material type, and vapor barriers are specified. Pipe schedule entries include fitting types, valve locations, and drain/vent provisions.
Design Parameters
Schedules indicate fluid type (water, glycol mixture, or refrigerant), operating temperatures, and maximum velocities (typically 4-8 feet per second). Expansion loop requirements and support spacing are documented. Schedules ensure adequate sizing for proper system operation and energy efficiency.
Construction Application
Contractors use pipe schedules for material ordering, fabrication, and installation. Schedules guide pressure testing procedures and enable accurate system balancing. They provide reference documentation for future maintenance and modifications.