pipe flange mounting hole diameter 1

[7016]

Hello All,

FYI:
DN2600 Butterfly valve flange mounting hole diameter = 62mm.
Bolt size = M56.

Doubt:
By mistake we have manufactured water pipeline flange with mounting hole diameter = 60mm.
Now we don't have option to increase hole size to 62mm.

Does it create any problem if I use this 60mm mounting hole pipeline flange to install such a big valve? Is it make difficult to allign valve with pipeline flange?

Please help me with your onsite experiences.

 

[TiCl4]

Max body diameter on an M56 bolt is 56 mm. Your clearance on all sides of the bolt just went from 3 mm to 2 mm. This means your tolerances for slight misalignment of bolt hole patterns is lower. Whether or not it will cause issues will really depend on how accurately the valve holes are made.

That's a really big valve. Can you create a template of your existing pipe flange and overlay it on the butterfly valve to confirm fit before trying it in the field?

Also, why can't you drill out the 60 mm holes to be 62 mm?