Flange to wall clearance 1

[mae1133]

I have an 8" stainless steel pipe to be cast into a concrete wall and running parallel to another concrete wall. An ANSI 150# flange needs to be cast into the wall that the pipe is penetrating. How close to the adjacent wall can the flange be installed to allow installation and removal of the mating flanged pipe? See attached for clarifying sketch.

 

[pennpiper]

Mae1133,
You need to consider "Wrench Clearance", talk to an experienced Maintenance Operator.

Question: Why are your bolt holes oriented at the Nine O,clock and three O,clock positions?

Sometimes its possible to do all the right things and still get bad results

 

[DGrayPPD]

You can do a Google search for this and find some references to go by, like what is shown below.

"The only limits in life are those which we impose upon ourselves."

 

[mae1133]

pennpiper……..it's only a sketch. The actual install would be detailed to have maximum bolt hole clearance from the side wall. The reason I posted it here is because I do not know an "experienced maintenance operator", so thought some of the other designers here would have come across this. Sorry if this is not the proper forum to ask this type of question.

 

[mae1133]

DGrayPPD…..Awesome! Thanks I did a search and couldn't find anything, but this is perfect.

 

[LittleInch]

The issue as well though from your description is the distance of the flange face from the wall in order to get the bolts in, i.e. the Top view of the sketch you originally had.

Whilst when new you can insert the bolts from the far side and hold the nut, if you ever have to remove them you can bet that the inner nut will seize and hence the bolt needs to be withdrawn in that direction towards the wall. to get the bolts in I would go for length of bolt plus 25mm as the minimum. Or are you going for a studded flange?

Oh and I know it wasn't accurate. but usually the top holes straddle the vertical centerline. Makes it much easier to get all the flanges in the same orientation.

like this

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[mae1133]

LittleInch….thanks. Yes, I regret not drawing the sketch showing the bolt holes in the wrong orientation. We always provide a detail drawing similar to the picture you provided.