Hey, I am brand new to this Forum, and I am trying to design a pressure testing chamber. The plan is to test a sample cylinder that is fitted with two needle valves and a quick connect fitting for leaks. I want to do this by pressuring it up to 1800 psi with air and putting it in the chamber which will be filled with water so I can watch for bubbles. The cylinder is a DOT 3E 1800 and is double sided. All nozles are 1/4". I need to find out the velocity with which a valve or a fitting would hit the sides of the chamber so I can decide of an applicable material. How can I calculate this?