Many industries use compressed gas cylinders to store substances such as oxygen, propane, acetylene, or fire suppressants. Structural flaws in a cylinder can turn dangerous resulting in leaks, ruptures, or even deadly explosions. The two primary methods of testing cylinders to detect these potential flaws are hydrostatic testing and ultrasonic examination. The processes of these…

The choice of re-qualification testing method for portable cylinders is based on a variety of factors.  In most cases, DOT regulations offer choices.  This 5 part article discusses the different choices when it comes to re-qualification testing methods for portable cylinders. Each part will identify the type of re-qualification testing method and provide a brief…