GAP BETWEEN REINFORCEMENT PAD AND PIPE WALL
GAP BETWEEN REINFORCEMENT PAD AND PIPE WALL
(OP)
WE ARE ADDING A REINFORCEMENT PAD AT A PIPE BRANCH CONNECTION. THE RUN PIPE IS DISTORTED (SUCKED IN AND SOMEWHAT FLATTENED) THE REINFORCEMENT PAD WILL BE WELDED ON WITH THE PIPE IN SERVICE AND UNDER PRESSURE AND ROUNDING UP OF THE PIPE IS NOT BEING ALLOWED BY THE CUSTOMER.
QUESTIONS
1. DO ANY OF THE ASME CODES HAVE A CRITERIA ON THE ALLOWED GAP BETWEEN THE REINFORCEMENT PLATE AND THE PIPE WALL AT THE OUTER EDGE LOCATION OF THE FILLET WELD?
2. SEPARATELY IS THERE ANY GAP CRITERIA AND THE INNER FULL PENETRATION WELD LOCATION?
3. WE ARE CONSIDERING 2 PIECE REINFORCEMENT PAD WITH PARTIAL DEPTH SLOTTING SO THAT THE PAD BECOMES MORE FLEXIBLE AND CAN BE CLAMPED DOWN ONTO THE PIPE WITH MINIMAL FORCE. THEN THE INNER FULL PENETRATION AND OUTER FILLET WELDS WILL BE MADE. THEN THE PARTIAL DEPTH SLOTS WILL BE WELDED UP. ANY COMMENTS OR OTHER SUGGESTIONS WOULD BE APPRECIATED?
THANKS





RE: GAP BETWEEN REINFORCEMENT PAD AND PIPE WALL
If I understand your post correctly, I would be very concerned that installation of a repad with a known gap due to out of round pipe will result in no structural reinforcement because the fillet welds would be carrying the entire load with no support from the repad. Also, excessive opening at the root of the fillet weld would result in local stress concentration and possible crack propagation in cyclic service. Not a very good design.
RE: GAP BETWEEN REINFORCEMENT PAD AND PIPE WALL
RE: GAP BETWEEN REINFORCEMENT PAD AND PIPE WALL
RE: GAP BETWEEN REINFORCEMENT PAD AND PIPE WALL
RE: GAP BETWEEN REINFORCEMENT PAD AND PIPE WALL
RE: GAP BETWEEN REINFORCEMENT PAD AND PIPE WALL