HVAC & Mechanical Solutions
Flanges for chilled water, hot water, and steam HVAC systems.
Overview
HVAC and building mechanical systems move conditioned water and steam throughout commercial and institutional buildings. Flanges connect chillers, boilers, pumps, heat exchangers, and distribution piping. Building codes (ASME, ANSI) and pressure vessel rules govern design, but reliability and long service life are paramount for occupied spaces.
Applications
Chiller inlet/outlet flanges
Boiler main steam and return connections
Pump suction and discharge manifolds
Heat exchanger nozzle flanges
Expansion tank connections
Pressure vessel outlet ports
Building loop balancing connections
Relevant Standards
- •ASME B16.5 (standard pressure classes)
- •ASME B31.9 (building services piping)
- •Building/local plumbing codes
Material Grades
ASTM A105
standard carbon steel
ASTM A694
higher strength
Cast iron
lighter duty application
Common Pressure Classes
150
PSI
300
PSI
Typical Service Specifications
HVAC flanges operate at 150-300 PSI with temperatures from 32°F (chilled water) to 400°F (saturated steam). Service life expectations often exceed 30+ years. Material Test Reports and pressure ratings must be readily available for building inspection and retrofit projects.
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