CrimsonEngineer
Civil/Environmental
- Dec 5, 2008
- 10
Can anyone help with the the axial(compression) force a gate valve can withstand?
For a project I am working on we are cutting a 30" diamter cast iron water pipe and installing a 30"x12" reducer(or two reducers back to back) and then a 12" gate valve to replace a section of this main with 12" pipe. During construction we will temporarily need to provide thrust blocking for the reducer and closed 12" valve. The setup proposed is as follows: 30" pipe-30x12 reducer-12" gate valve-short section of 12" ductile iron pipe-12" cap-temporary concrete block-steel plate-existing 30" pipe. The temporary concrete block will later be removed and the 12" pipe extended.
The issue i am investigatin is that during this temporary configuration the thrust force on the reducer/closed valve will put the valve and short section of 12" pipe in compression between the reducer and the thrust blocking and i don't know if the valve can handle this type of stress. The thrust force is 83,000 pounds. Can anyone tell me if cast iron gate valves can handle this type of compression stress? The valve will not need to operate during the temporary scenario.
I am in contact with the valve manufacturer and am waiting for their response but was hoping someone on this forum may have experience with this question. Thanks
For a project I am working on we are cutting a 30" diamter cast iron water pipe and installing a 30"x12" reducer(or two reducers back to back) and then a 12" gate valve to replace a section of this main with 12" pipe. During construction we will temporarily need to provide thrust blocking for the reducer and closed 12" valve. The setup proposed is as follows: 30" pipe-30x12 reducer-12" gate valve-short section of 12" ductile iron pipe-12" cap-temporary concrete block-steel plate-existing 30" pipe. The temporary concrete block will later be removed and the 12" pipe extended.
The issue i am investigatin is that during this temporary configuration the thrust force on the reducer/closed valve will put the valve and short section of 12" pipe in compression between the reducer and the thrust blocking and i don't know if the valve can handle this type of stress. The thrust force is 83,000 pounds. Can anyone tell me if cast iron gate valves can handle this type of compression stress? The valve will not need to operate during the temporary scenario.
I am in contact with the valve manufacturer and am waiting for their response but was hoping someone on this forum may have experience with this question. Thanks