Works around acceptable flash steam velocities of 15 20 m s according to the pipe size and the proportion of flash steam formed.
Condensate drain pipe size.
When sizing condensate return lines in steam distribution system remember that the maximum condensate flow is achieved during plant start up when pipes and equipment are heated up.
Condensate waste and drain line size shall be not less than 3 4 inch 19 mm internal diameter and shall not decrease in size from the drain pan connection to the place of condensate disposal.
Drain sizing imc 307 2 2 tells us that an a c condensate drain inside diameter should not be smaller than 3 4 and should not be smaller than the drain pan outlet diameter.
Where the drain pipes from more than one.
Drain lines containing no flash steam.
When it comes to having a condensate pipe installed there are certain restrictions in terms of size and position that must be considered.
The minimum size for the overflow pipe is 21 5mm and needs to be made from a non metallic material for allowing a reasonable flow of water waste.
A rule of thumb the condensate load used to design condensate pipe lines should be twice the maximum production load.
3 4 is sufficient for up to 20 tons according to the imc unless the drain outlet size is larger than 3 4.