Use a weldolet or a split tee ?
Use a weldolet or a split tee ?
(OP)
When making a branch connection for a hot tap, we always use a split tee for a size-on-size connection. When we have a branch connection size smaller than the header, our piping designers always want to use weldolets. What is anyone's experience regarding the use of weldolets when you are close to size on size, i.e. 4" sch. 40 on a 6" sch 40 ?





RE: Use a weldolet or a split tee ?
It explains the differences with a "tee-Let" & Weld-o-let installation. Hope this helps, Good Luck! ...Mark
RE: Use a weldolet or a split tee ?
You cannot substitute any kind of piping "tee" or weldolet fitting for any other type of split/slit or weld-on fitting and be in conformance with the rules of the ASME B31.1/B31.3 piping codes.
If the piping system is installed to these codes, the tee(or intersection) must either meet the dimensional requirements of ASME/ANSI B16.9 or be certified by the manufacturer to specific pressures and temperatures.
Both codes also allow for calculation of "areas of reinforcement" for the unique field fabricated cases. These calculations are supposed to be performed by an Engineer....
For many years the folks at Bonney Forge (weldolets)and WFI have been warning against non-certifed, field designed, and "shade tree" engineered piping fittings. You simply cannot design, fabricate, slit and reweld-up anything that you want in a B31.1/B31.3 piping system......
I would like to see a Mr. John Breen weigh in on this issue
My thoughts only..................
MJC
RE: Use a weldolet or a split tee ?