Pipe insertion depth ASME Section VIII Div 1
Pipe insertion depth ASME Section VIII Div 1
(OP)
Does anybody happen to know the typical insertion depth of a 20" sch 10 pipe into a 20" slip on flange that would satisfy ASME SEction VIII, DIV 1?





RE: Pipe insertion depth ASME Section VIII Div 1
see section viii div 1 appendix 2 fig 2-4 (3)
RE: Pipe insertion depth ASME Section VIII Div 1
Regards,
Mike
RE: Pipe insertion depth ASME Section VIII Div 1
RE: Pipe insertion depth ASME Section VIII Div 1
Would you please help me understand why are these clearances required and how did they arrive at these figures (example:
'1/8 clearance between weld toe and corner of flange bore/face'.
Thanks in advance.
RE: Pipe insertion depth ASME Section VIII Div 1
just the rules
It is nice to have the clearance so you won't damage face while welding
RE: Pipe insertion depth ASME Section VIII Div 1
The 1/8" clearance is to allow thermal expansion of the branch during welding, so that hot cracking of the weldment or developing residual stresses does not occur.
RE: Pipe insertion depth ASME Section VIII Div 1
A slip-on flange is attached to the pipe with two 45 degree bevel welds. The one weld is on the out side of the pipe at the back of the flange hub. The other weld is on the inside of the flange (behind the flange face) attaching the end of the pipe to the inside of the flange.
The dimension for the height of both 45degree bevel welds is to be equal to the thickness as the pipe wall. The 1/8" clearance is to allow for a little tolerance for the welder and prevent weld spatter from damaging the flange face.
So the answer is: Insert the pipe into the slip-on flange only far enough to allow distance from the end of the pipe to the face of the flange equal to the thickness of the pipe wall plus 1/8"