Safety procedure for valve replacement and leak detection on a tank car

A method comprising the steps of:

• remove a first valve located on a tank car and replace the first valve with a replacement valve, wherein the replacement valve is installed in an open position;
• insert a pressure test device into the replacement valve, wherein the pressure test device includes a pressure test valve cap with a test valve bladder located on a lower end of the replacement valve, a bladder pressure fitting connected by a hose to the test valve bladder and connected through the pressure test valve cap to inflate and deflate the test valve bladder against a wall of a siphon pipe, and a test pressure fitting to pressurize the replacement valve to detect a leak in the replacement valve;
• apply the bladder pressure to the test pressure fitting and the test valve bladder to inflate the test valve bladder to tighten the test valve bladder against the wall of the siphon pipe;
• apply a test pressure through the pressure test valve cap;
• conduct a bubble leak inspection of the replacement valve that includes utilizing a bubble liquid on the replacement valve, wherein if there is a leakage at the replacement valve, the bubble liquid will bubble at the replacement valve and if there is no bubbling at the replacement valve, there is no leakage at the replacement valve;
• release the test pressure;
• deflate the test valve bladder;
• and
• remove the pressure test device.