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
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
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.