What is a Breakaway Coupling for Loading Arm?
Breakaway coupling is a specialized mechanical device installed on loading arms (or hoses) at the interface between fixed storage systems and mobile transport units (e.g., tank trucks, railcars). Its primary function is to automatically separate into two halves when subjected to an excessive pulling force-such as that caused by a tanker driving away prematurely-while simultaneously sealing both the fixed and mobile sides of the system. This dual-action (separation + sealing) prevents uncontrolled fluid leakage, safeguards the loading arm from structural damage, and eliminates the risk of cascading accidents.
Unlike generic breakaway couplings used for hoses, those designed for loading arms are engineered to withstand the unique stresses of rigid loading arm systems, including lateral forces, high pressure, and compatibility with a wide range of corrosive or volatile fluids.
