For freight locomotives, what is the brake pipe pressure during yard service?

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In freight locomotives during yard service, the standard brake pipe pressure is set at 90 psi. This pressure is crucial for effective braking and the proper operation of the air brake system. Maintaining the brake pipe pressure at this level ensures that the brakes can operate efficiently, allowing for safe handling of trains in yard operations where frequent stops, starts, and switching occur.

Establishing the brake pipe pressure at 90 psi strikes a balance that supports the necessary braking power without overwhelming the system or unnecessarily stressing the components involved. By understanding this standard, conductors and other rail personnel can ensure that safety protocols are followed, leading to optimal performance when moving freight.

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