What is the minimum flow velocity required in horizontal piping to prevent blockage?

The minimum flow velocity required in horizontal piping to prevent blockage is vital to ensure the continuous movement of fluids and to avoid settling of particulates or sediment within the pipe. A flow velocity that is too low may allow solids to settle, leading to blockages that can disrupt the flow dynamics and potentially damage the system.

The correct answer of 0.6 m/s (2 ft/sec) is widely recognized as a standard minimum velocity for many applications, particularly when dealing with water and similar fluids. This velocity is deemed sufficient to maintain fluid movement and prevent sedimentation or the formation of deposits in horizontal pipes.

This velocity is particularly important in systems such as drainage, sewage, and process piping, where the characteristics of the fluid can lead to sediment accumulation if the flow rate is inadequate. Maintaining this minimum threshold ensures efficient operation and reduces the risk of blockages over time.

In contrast, flow velocities that are lower than this threshold, such as those provided in the other choices, may not be adequate to prevent settling of solids, thus increasing the likelihood of blockages and operational issues. Therefore, a minimum velocity of 0.6 m/s is crucial for effective fluid transport in horizontal piping systems.