20" x 12" Reducer for 720 psig design pressure
20" x 12" Reducer for 720 psig design pressure
(OP)
Hello,
We need a 20" x 12" Reducer for 720 psig design pressure @ 120 F. Piping is A106 Gr. B.
Per formulas in B31.1, this requires Schedule 40 on the 20 inch and STD wall on the 12 inch.
We found out that "purchased" fittings above 12 inch are only available in STD wall and for the 20 inch, STD wall = Schedule 20 which is below our need of Schedule 40.
Thus, we are considering our options.
One option is to order a Schedule 40 pipe cap (if available or a spun head if not) and stub in the 12 inch with repad. The calculations show the repad will use up almost all of the available space.
Is there a better solution ?
Any suggestions you may offer would appreciated.
We need a 20" x 12" Reducer for 720 psig design pressure @ 120 F. Piping is A106 Gr. B.
Per formulas in B31.1, this requires Schedule 40 on the 20 inch and STD wall on the 12 inch.
We found out that "purchased" fittings above 12 inch are only available in STD wall and for the 20 inch, STD wall = Schedule 20 which is below our need of Schedule 40.
Thus, we are considering our options.
One option is to order a Schedule 40 pipe cap (if available or a spun head if not) and stub in the 12 inch with repad. The calculations show the repad will use up almost all of the available space.
Is there a better solution ?
Any suggestions you may offer would appreciated.





RE: 20" x 12" Reducer for 720 psig design pressure
RE: 20" x 12" Reducer for 720 psig design pressure
You're just looking in the wrong place to buy fittings. There is no way that the supply of reducers is limited to STD wall thickness above 12".
You need to find a different supplier. - Google is your friend. This in one of very many - search pipe reducer schedule 40. http://coleindustrial.com/fittings/concentric-and-...
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: 20" x 12" Reducer for 720 psig design pressure
Ditch your supplier.......I can find reducers of the proper wall thickness.
Be aware that in any case, higher schedule fittings and piping can be used in your service. Internally taper the fitting (in accordance with the piping code rules) at the butt weld location.
MJCronin
Sr. Process Engineer
RE: 20" x 12" Reducer for 720 psig design pressure
RE: 20" x 12" Reducer for 720 psig design pressure
Many buyers end up thinking they know more about design than the designers. They are rarely correct in that view. That's where Google is your friend.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: 20" x 12" Reducer for 720 psig design pressure
No, not necessarily "stronger material", but thicker material (larger schedule nbr) of the same material ... but bought from a different supplier.