Natural gas $(100\%$ methane$)$ saturated with steam, transferred with natural

gas pipeline, $P=60$ bar, $T=15cC.$ We want to reduce pressure $($with a pressure

reducer$)$ but not to cause icing problems. Which is the min pressure we can

reach $($without icing problems$)$

$JT=0,55\frac{K}{\frac{?}{?}}$bar $,z=0,90,MW=16,4$