rQuestionEngineering
Mechanical
- Aug 30, 2012
- 204
For a compressor with 2 nozzle.
At 90% torque on the INLET piping , the vertical offset is more than 0.05mm.
The shaft alignment was out of tolerance.
The engineer suggested to cut the INLET piping.
Maintaining the above INLET piping condition at 90% torque, the OUTLET piping was torque to 100%
It was observed the the vertical offset of the INLET piping reduced.
Lastly, the INLET piping was torque to 100%.
With both piping connected at 100% torque, the machinery alignment was back within tolerance.
Question.
1. Hence it was decided that INLET piping does not required cutting. Is this compliant to API686 ?
2. Despite excessive stress from 1 piping , if it can be countered by stress of another piping , and the overall shaft alignment is within tolerance at the final position, no piping needs to be cut.
Is this understanding compliant to API686 ?
At 90% torque on the INLET piping , the vertical offset is more than 0.05mm.
The shaft alignment was out of tolerance.
The engineer suggested to cut the INLET piping.
Maintaining the above INLET piping condition at 90% torque, the OUTLET piping was torque to 100%
It was observed the the vertical offset of the INLET piping reduced.
Lastly, the INLET piping was torque to 100%.
With both piping connected at 100% torque, the machinery alignment was back within tolerance.
Question.
1. Hence it was decided that INLET piping does not required cutting. Is this compliant to API686 ?
2. Despite excessive stress from 1 piping , if it can be countered by stress of another piping , and the overall shaft alignment is within tolerance at the final position, no piping needs to be cut.
Is this understanding compliant to API686 ?
