What is the minimum bending radius for a 3-inch schedule 40 pipe according to NFPA 13?

The minimum bending radius for a 3-inch schedule 40 pipe, as specified in NFPA 13, is critical for ensuring the integrity and performance of the fire protection system. Bending a pipe beyond its specified radius can lead to kinks, which may reduce the pipe’s diameter or create stress points, potentially leading to failure.

In this context, a bending radius of 15 inches is established to enable the pipe to maintain its structural integrity while being installed. This guideline helps ensure that the system can adequately perform its function without the risk of damage that can occur with improper bending. Adhering to these specifications is essential for maintaining the reliability and effectiveness of fire suppression systems.