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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
I have never heard of such a requirement in all of my piping history. Before you (or I) proceed on this we need to pin the Process Engineer down on the reason for such a seemingly unreasonable requirement. I don't mean "because he said so" but a real definable, logical and valid reason. This is going to be costly.
Questions:
- What is the commodity?
- What is the Operating Pressure and Temperature?
- What Type of Unit and Plant is this?
- What type of equipment is upstream of this requirement?
- What type of equipment is down stream of this requirement?
I have never heard of such a requirement in all of my piping history. Before you (or I) proceed on this we need to pin the Process Engineer down on the reason for such a seemingly unreasonable requirement. I don't mean "because he said so" but a real definable, logical and valid reason. This is going to be costly.
Questions:
- What is the commodity?
- What is the Operating Pressure and Temperature?
- What Type of Unit and Plant is this?
- What type of equipment is upstream of this requirement?
- What type of equipment is down stream of this requirement?
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.
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.
Well you provided a lot more information but it does not answer the question and sounded like it all came from you not the Process Engineer.
Please try to get the process engineer to answer the previous questions and these:
- Is the Reactor above the other equipment?
- Is the 5" nozzle on the bottom of the Reactor?
- What is the distance from the Reactor to the next piece of equipment?
- Is the next piece of equipment a Regenerator? or a catalyst holding bin?
Well you provided a lot more information but it does not answer the question and sounded like it all came from you not the Process Engineer.
Please try to get the process engineer to answer the previous questions and these:
- Is the Reactor above the other equipment?
- Is the 5" nozzle on the bottom of the Reactor?
- What is the distance from the Reactor to the next piece of equipment?
- Is the next piece of equipment a Regenerator? or a catalyst holding bin?
http://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!
http://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
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
Thanks 11echo
Thanks 11echo
Had a similar problem and found some equipment here http://www.dwt-gmbh.de/en/flange-repair-equipment.html Maybe this can help you too