Pressure calculation for overhead steam pipelines
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Our unit's existing steam pipeline is an overhead installation, 6 meters high, with a maximum cylinder outlet pressure of 0.5MPa. It is used to provide winter steam heating for one three-story building and two two-story buildings in the unit. The heating area is about 5,000 square meters. The inner diameter of the pipeline is 80 (changed to 50 when branched), and the total length is 1.5km. Due to internal re-planning of the unit and other reasons, the three intersections through which the pipeline passes must ensure a clear height of more than 8m. The construction unit provided a design drawing that raised the pipeline to 8.5m at the three intersections and lowered it to 6 meters after crossing the intersection, and the original pipeline was used. Now I want to know, how much pressure drop is caused by this design? It would be best if there is a detailed calculation process and explanation! Thanks!
It is estimated that the pressure drop in the pipeline will not be too large in the situation you mentioned, and it should not affect the use!
Basically, two elbows are added at the intersection, the pipe is raised by two meters, and the increase in pressure drop is basically negligible.
Pipe resistance is as mentioned by several people above. Because it is not a liquid, just a vapor, the static pressure loss can be ignored.