The oil and gas industry moves huge amounts of fuel around the U.S. in more than 2.6 million miles 0f pipelines. Disrupting these movements with frozen valves results in costly scenarios for operators. How do these frozen valves occur? There are various situations where a control valve can freeze over, but one of the most common ones is due to the Joule-Thomson effect. So what is the Joule-Thomson effect and how...