API 12J calls for using k factor as 0.12 to 0.24 for vessels with length as 5 feet.
GPSA calls for de-rating of thek factor based on pressure.
Pressure, psig De-rating For Mesh Demisters At
Elevated Pressure
Atmospheric 1.00
150 0.90
300 0.85
600 0.80
1,150 0.75
If I am using API 12J for k factor do I need to de-rate the k factor? For e.g. if my vessel height is 5 feet and is operating at 1150 psig. Do I just use a k factor between 0.12 and 0.24? or do I use 0.24 and de-rate it as per GPSA?
If I am using GPSA for sizing do i use 0.35 as the max k value provided by GPSA and use 0.75 as de-rating factor??