Weldolet
Weldolet
(OP)
when we use weldolet and when we must use pipe to pipe connection?
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RE: Weldolet
Chose one of the standards, if it exists.
Otherwise use a weld-o-let.
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"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: Weldolet
but you did't mention any consept for chosing pipe to pipe instead of weldolet.
RE: Weldolet
The company I worked for used tees where they were available (you can usually get a reducing tee with the branch 1/2 or greater than the run) and weld-o-lets where tees are not available. I've seen similar rules at other companies.
David
RE: Weldolet
If you see it here, buy it.
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If they don't make it, you'll have to use a w-o-l.
I use Tees when the outlet diameter is > 1/2 straight run diam.
**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: Weldolet
I ran the test at 4 different inlet Reynolds Numbers (all in gas, all turbulent) in each direction. For the reducing tee in reducing direction (6 inch down to 4-inch), pressure increased at each Reynolds Number. For the reducer-and-elbow in the reducing direction, pressure decreased at every Reynolds Number (my hypotheses was that we got boundary layer separation in the reducer that added to the dP, but I never did further tests to asses the hypotheses). Going the other way, the reducing elbow gave me a lower dP than the reducers and elbow every time. In short, the reducing elbow out performed the company-approved methods in both directions at every Reynolds Number tested with 6-inch and 4-inch pipe.
Granted, I needed every bit of my calibrated precision to show the differences (they tended to be on the order of 0.01 psi difference), but I made my case and got the stupid company standard changed. My real point was that it saved a weld, but better hydraulic performance was valuable icing on the cake.
Before anyone asks, this report was company internal at a time that the company did not allow publishing any technical data. It isn't published anywhere and I couldn't give you a copy if I still had one.
David
RE: Weldolet
RE: Weldolet
David
RE: Weldolet
RE: Weldolet
RE: Weldolet
RE: Weldolet
Same with reducing tees, but that is another story.
David
RE: Weldolet