Thanks, Katmar.
The length I am looking at is only 300 ft. Well, it's really confusing. I noted "scfm" initally because my friend told me that's the right way. acfm number is higher in vacuum. 6 times @ -25"Hg. acfm is 1/7.8 of scfm number @ 100 psig of air.
If I use the ratio method as...
Hi, Katmar.
Yes, pipe ID 1.38" (1.25" sch 40). And yes Appendix B-14/15 is what I was looking at. I have 1981, 20th edition.
Amazingly, the page numbers are still the same.
I think there is a mistake in your statement;
The velocity I get is 280 ft/sec. Speed of sound at 68F is 1126 ft/sec...
I would like to know how to size VACUUM process pipes.
I was told by a facility engr friend to the following;
1. determine the total flow rate (scfm)
2. determine the size of the pump accordingly
3. convert scfm to acfm
4. look at the pressure loss chart (crane chart out of
Flow of Fluids ->...
