extremechanical
Mechanical
- Sep 8, 2009
- 65
Hi Experts,
API 676 para 7.4.16 does not allow shims beneath the pumps ( for Positive displacement) and similarly API 610 6.3.4 for centrifugal.
* May I know if API 686 also does not allow shimming beneath pumps?
* Other than pipe strain is there a reason why shims are not allowed?
* I am also told shimming should be avoided more so for API 676 pumps ( PD pumps ) than centrifugal, is this correct?
* We have a vertical VS6 Pump and I am planning to shim the gap between sole plate on the foundation and the mounting plate which is part of the can. Is this also not allowed? Someone said it decreases natural frequency. May I know why?
* Could anyone also confirm the reason for limiting the thickness to only 3 mm
Thanks a lot in advance !
API 676 para 7.4.16 does not allow shims beneath the pumps ( for Positive displacement) and similarly API 610 6.3.4 for centrifugal.
* May I know if API 686 also does not allow shimming beneath pumps?
* Other than pipe strain is there a reason why shims are not allowed?
* I am also told shimming should be avoided more so for API 676 pumps ( PD pumps ) than centrifugal, is this correct?
* We have a vertical VS6 Pump and I am planning to shim the gap between sole plate on the foundation and the mounting plate which is part of the can. Is this also not allowed? Someone said it decreases natural frequency. May I know why?
* Could anyone also confirm the reason for limiting the thickness to only 3 mm
Thanks a lot in advance !