Power steering hoses are an essential component of a vehicle's power steering system. They are responsible for transferring power steering fluid from the power steering pump to the steering gear, allowing for easy and smooth steering of the vehicle. However, over time, power steering hoses can wear out and develop leaks, requiring replacement to maintain proper functioning of the power steering system.

Another reason for the power steering hose blowing off could be due to high pressure within the power steering system. If there is a blockage or restriction in the system, it can cause pressure to build up, putting strain on the hose and causing it to detach. It is important to have your power steering system inspected regularly to ensure that it is functioning properly and that there are no blockages or restrictions.

If the hose is connects the air conditioning evaporator, receiver/drier, and bottom connection of the condenser, It is the liquid A/C hose, the hose size is #6 5/16, the small hose in the car air conditioning system.