Water Velocity in Schedule 40 Pipes
Water Velocity in Schedule 40 Pipes
(OP)
Hi,
I am wondering if there are ruel of thumbs to respect for water supply velocity in Schedule 40 pipes? I performed the calculations and the pressure drops are ok but I am just wondering what kind of velocity I should target. I am supplying cooling water to a dynamometer at 750 GPM in a 6" pipe and the veoclity is approx. 8 ft/s. Is this too high? Are there velocity figures that shall be respected?
Regards,
Gabriel Leblanc
I am wondering if there are ruel of thumbs to respect for water supply velocity in Schedule 40 pipes? I performed the calculations and the pressure drops are ok but I am just wondering what kind of velocity I should target. I am supplying cooling water to a dynamometer at 750 GPM in a 6" pipe and the veoclity is approx. 8 ft/s. Is this too high? Are there velocity figures that shall be respected?
Regards,
Gabriel Leblanc





RE: Water Velocity in Schedule 40 Pipes
API 14E is the most common guideline that I know of for erosional velocity concerns. In Imperial units, I think the magic number to not exceed is about 8,000 to 10,000.
Regards,
SNORGY.
RE: Water Velocity in Schedule 40 Pipes
Over 3 ft/sec to avoid corrosion due to MIC; less than 10 ft/sec to avoid erosion.
Patricia Lougheed
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RE: Water Velocity in Schedule 40 Pipes
rmw
Now it comes to me - it was from Cameron's Hydraulic.
PPS: Patricia, since we know you work in nuclear and most of that is stainless (or better), 10 fps seems a little low for stainless, huh????
RE: Water Velocity in Schedule 40 Pipes
Wish it was all stainless, but it's not. Lots of bronze and carbon steel still around. Seen more than a few heat exchangers where they had to retube.
Patricia Lougheed
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RE: Water Velocity in Schedule 40 Pipes
OK, now I understand where you are coming from. You have my sympathy. (So does your steam generator tubes and turbine blades.)
rmw