TRUE Y Fitting

[IAAWVU05]

Does anyone know where to find a true y pipe fitting (10" Class 150)? I can't seem to find any manufacturers of one. I have found some places that custom them, but that takes time and money (6 weeks, >$3K). I have access to a machine shop, and I have ASME B 16.5. Would the best solution be to produce a fabrication drawing, or keep looking for other vendors?

Thanks,

IAA
WVU '05

 

[rconner]

If the application is e.g. water or wastewater, you might try a ductile iron fitting e.g. per ADIP Table No. 6-14 at

http://www.acipco.com/adip/fittings/flanged/wyes.cfm.

 

[pennpiper]

IAAWVU05,
Why do you want a "true Y"?
What is your service?
What are the pressure and temperature conditions?

 

[STYMIEDPIPER]

I have NOT seen or used a carbon steel pipe wye in the last twenty plus years.
If you are replacing an in-service wye,you have at least two (2) options:
1. Bite the bullet and spend the money to fabricate and replace in kind which presumably will save on field installation costs
OR
2. Reconfigure the piping in the immediate area to utilize pipe tees or nozzles. This option obviously would increase your installation cost.
If time and money is of utmost concern then you should compare ther costs associated with the two options listed above ands make an informed desicion.

 

[IAAWVU05]

I am using a true y in the downcomer part of a gas-solids flow reactor. The existing structure is already there, I just have to reconfigure the downcomer. I want to bifurcate a path just by using gravity (because I do contract work for a lab, and the scientists there wanted to experiment with different downcomer configurations to study the particle behavior in that configuration). If I were to use anything else, the distribution would be uneven (with a branch connector), or the solids would gather at that point in the piping (with a tee. Temperature and pressure conditions are mild (room temperature + 50 psig). I haven't been around piping that much (~6 months), so this seemed to be the best solution for the project.

 

[zdas04]

The Wye might be the best choice (I'm not convinced, but maybe), but no piping configuration will ever ensure even flow distribution. Flow is very opportunistic and will pick the direction that is a nano-bar lower pressure. Just because the pipe looks the same both ways, one direction will have a bit of extra weld material on a joint, a bit of mill slag, an tee turned differently, etc. and the other pipe will take more flow. It can't be helped without very sophisticated measurement/control equipment.

One way that might answer all of your concerns is to flow into the branch of a tee, then weld two more tees to the outlets of the first tee (through-end to through-end), connect your piping to the branches on the outer tees and install weldneck flanges with blinds on the open outlets to allow clean out.

David Simpson, PE
MuleShoe Engineering

http://www.muleshoe-eng.com

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

The harder I work, the luckier I seem

 

[unclesyd]

Have you check out these suppliers one of them used to supply standard wyes for our conveying systems. There is another type we used that was considerably longer and with a small included angle. I am still searching for it.

http://www.unitedstatesfittings.com/laterals.asp#TrueWyes

http://www.islandfitting.com/trueWye/index.html

 

[JStephen]

If it's not high pressure, can't you just fab it up out of pipe?

If I remember right, the Weldbend catalog I've got (several years old) shows wyes made up out of pipe.

 

[IAAWVU05]

Thanks for all the input. After checking the suggested websites, and showing my supervisor, he said that it would probably be best to fab one up in-house. I am currently working on the CAD drawing and submitting it to the resident pipe fabrication person.