What does a Long Radius (L.R.) fitting typically indicate?

A Long Radius (L.R.) fitting is specifically designed to create a gradual change of direction in piping systems. The radius of the bend is larger compared to standard fittings, which helps in minimizing turbulence and pressure drop within the flow. This characteristic is particularly beneficial in various applications, including HVAC and plumbing systems, where maintaining a smooth flow is essential for efficiency and performance.

Due to the gentler curve, Long Radius fittings reduce the likelihood of wear and tear on pipelines caused by sharp directional changes, which can lead to increased maintenance costs and system failures over time. They are often chosen in situations where optimal flow is a priority, making them a standard choice in many pipefitting scenarios.