# Is the pressure in a pipe equal the pressure in the tank?

Physics Asked by PhysicsGuy123 on December 26, 2020

In my example, there is a tank which is holding gas under pressure. Connected to this tank is an output pipe. Assuming the pipe is the same diameter for the entirety of its length, would the pressure within the pipe be equal to that of the pressure in the tank?

Likewise, if a component has a maximum pressure rating, how could one reduce the pressure in the pipe such that the gas flowing into this component doesn’t exceed this maximum pressure?

The pressure can be reduced by gravity and flow. The pressure at a greater height will be larger than than at a lower height (however, if you're dealing with just a gas, you need a large distance for the difference to be significant). Also, when a fluid under pressure is released, some of the internal energy is converted to velocity, reducing the pressure. So when gas is flowing out of the tank, its pressure will be lower than the gas in the tank.

Answered by Acccumulation on December 26, 2020

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