## Flange thickness calculations

## Flange thickness calculations

(OP)

Good morning,

I have been tasked to calculate a flange thickness design check for the following procedure:

We will be tapping a 1/4" NPTF onto a 2" 150# WNRF flange rim, after which we will drill a 1/8" hole through.

I would like to know where I can go and look for the calculations to determine if this flange thickness is sufficient for a 150 line.

I've looked through ASME Section VIII, B16.5 and trawled through forums, but to no avail.

Thank you all for your help in advance!

I have been tasked to calculate a flange thickness design check for the following procedure:

We will be tapping a 1/4" NPTF onto a 2" 150# WNRF flange rim, after which we will drill a 1/8" hole through.

I would like to know where I can go and look for the calculations to determine if this flange thickness is sufficient for a 150 line.

I've looked through ASME Section VIII, B16.5 and trawled through forums, but to no avail.

Thank you all for your help in advance!

## RE: Flange thickness calculations

There are standard orifice flanges, but they seem to start at 300# rating.

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

## RE: Flange thickness calculations

## RE: Flange thickness calculations

proveit though..The problem with sloppy work is that the supply FAR EXCEEDS the demand

## RE: Flange thickness calculations

As SbTMan suggested it will likely have negligible effect but the above method should allow you to qualitatively address it.

## RE: Flange thickness calculations

## RE: Flange thickness calculations

## RE: Flange thickness calculations

## RE: Flange thickness calculations

No, if the 1/4 inch NPT is tapped "radially" (???) into a small 2 inch low pressure flange, then the actual hole is the OD of the 1/4 inch PNOM pipe that will be threaded into the NPT tapped hole.

The configuration is NOT clear from the words, and must be accurately sketched to scale.## RE: Flange thickness calculations

wereguessing....Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

## RE: Flange thickness calculations

Sorry I couldn't access this forum in the past few days, but thanks for all the input.

I am going to plan a FEA for this just to be on the safe side, because there is no guidelines at all in ASME for these kind of calculations.