Reducing Flange

Hi!

This sounds unusual but the process is requiring a 6" x 5" reduction of the line and it is indicated to use a 6"x5" 300lb. reducing weldneck flange. I already searched online and ASME B16.5 for the dimensions but could not find a direct answer. Can anyone help me with this....thanks!

Adam

There's a catalyst in the line, 320 °F, 5 psig. The line is coming from a reactor then sloping down a vessel. After the slope, there is a vertical section going to the nozzle. The reducing flange is at the vertical section. I believe the reason they specified the reducing flange is because the height of the reactor is set and the slope is already at the optimum and the unit is modularized.

www.kerkau.com/LiteratureRetrieve.aspx?ID=165325 ...Page 16

Reducing flanges are "normally" the same length as the standard flange, just the hub diameter has been reduced. Looks like you could go down to 2 1/2" (from 6") with a reducing flange. However this flange is real "odd-ball", I suggest you read my comments about odd-ball piping components at this link

viewtopic.php?f=26&t=3172 ...Good Luck!

Jop,
The Process Engineer is the licensor. We can ask the licensor but it would take time before they respond (if ever they respond). My scope is the regenerator section and our client just provided us with the coordinate to tie-in. The Reactor section is done by a different contractor, so I do not have the information about the nozzle. I believe there are 4-stack Reactors and the line going to the regenerator section is coming from the farthest reactor. The next piece of equipment after the Reactor is a Sulfur stripper vessel with a high temperature, around 1200 °F.

Adam