"Tanks have been used to control thermal expansion since the introduction of hydronic boilers in the early-1900s. With municipal cross-contamination programs becoming prevalent starting in the 1960s and ultimately leading to required backflow prevention devices being standard in many commercial applications by the 1980s, the need for thermal expansion controls became a critical component for domestic hot water systems—leading to the invention of the domestic thermal expansion tank in 1991. Although thermal expansion tanks are required for nearly all commercial projects that include domestic water heating, there continue to be substantial gaps in both design and installation that ultimately lead to operation and safety risk.
To help you avoid problems in your designs, this session will explore:
• Principles of thermal expansion
• Considerations for proper expansion tank sizing in domestic hot water and hydronic heating and cooling applications
Register at expo.aspe.org • Regional trends in improper installations of expansion tanks and measures that can be implemented
• Expansion tank types for proper selection in project design
• Risks associated with approving import residential-grade expansion tanks intended for use with volume multifamily and single-family construction
• Where ASME vessels should be required in project design, regardless of gaps in the plumbing code
• Regional trends in improper scheduling and design on commercial projects
• Common gaps in code enforcement"