Which of the following best describes a Vanstone edge?

A Vanstone edge is characterized by an edge that is turned out on a round pipe. This design is intended primarily for the purpose of allowing a pipe to be connected to other components, such as fittings and ductwork, without requiring precise alignment. The turned edge creates a flat surface, enabling a more secure connection by accommodating slight misalignments during installation.

In HVAC applications, this feature is particularly valuable as it facilitates quicker assembly and reduces the potential for leaks. The design is critical for maintaining the air-tightness and efficiency of duct systems. Understanding the specific geometry of a Vanstone edge is essential for anyone involved in the installation and manufacturing of HVAC components.