Pressure drop in steam line directly causes energy loses. Steam will lose certain percentage of its energy that turns into condensate.
So, if you are now designing your steam distribution line or improving the existing steam line, then steam line pressure drop calculation is the first step that you need to do.
The following online tools can be used for steam line pressure drop calculation. They are free and you can access them whenever you need.
Steam Pressure Drop Calculator from Engineeringtoolbox.com
Steam Pressure Loss Through Piping from TLV.com
Steam Pressure Drop Calculator from Spiraxsarco.com
Steam Pressure Drop Calculator from Easycalculation.com