Requirements for parallelism and concentricity of the flexible connection flange at the water pump outlet
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I previously posted in the rotating equipment discussion forum asking for a group, but I thought it was in the wrong forum, so I’m posting again here. I would like to ask the experts: Our company has newly installed a vertical multi-stage pump, whose outlet is equipped with rubber flexible coupling flanges. The alignment between these two flanges is poor; are there any relevant standards that specify requirements in this regard?
If you think it’s been posted in the wrong section, you can ask the moderator there to move it to the appropriate forum; reposting is not recommended! There are requirements for the connection of pipes together. If yours is too large, is that based on your own judgment or on standard specifications? Pipelines can be evaluated in accordance with the PFI standards of the American Pipe Association; I’m not aware of the domestic standards.
The concentricity deviation between the two flanges is 7.5 mm – do you think that’s significant? The issue is that it’s a rubber flexible connection
It’s our company’s fire hose, 26".