B31.3 ERW
B31.3 ERW
(OP)
Good day,
I have been asked to supply reasons why SA53B - ERW pipe should not be used for hot oil (550F)applications. System max pressure is 125psi. As far as I can tell, the code does not show a reason to exlude it from this application, however the longitutal seam now has a .85 multipier for min. thickness calculations.
Any one had any experience with this?
I have been asked to supply reasons why SA53B - ERW pipe should not be used for hot oil (550F)applications. System max pressure is 125psi. As far as I can tell, the code does not show a reason to exlude it from this application, however the longitutal seam now has a .85 multipier for min. thickness calculations.
Any one had any experience with this?





RE: B31.3 ERW
Beside the .85 efficiency factor, ERW seams may have flaws that could be severe enough to result in leakage or rupture. When properly tested and inspected, the probability of such flaws inducing failure is highly remote, especially at your stated operating conditions.
RE: B31.3 ERW
RE: B31.3 ERW
RE: B31.3 ERW
In my previous project, reject rate of UT was highly increased after sending a resident inspector at the mill...
RE: B31.3 ERW
As for corrosion allowance; Are you planning on prolonged 'down time' [months]? Temp is way too high for Corrosion-Under-Insulation, not high enough for serious scaling, and the oil inside is a metal preservative. Won't corrode much on OD, none on ID, while in-service.
RE: B31.3 ERW
The systems rarely have downtime longer than 1 week and that may happen once per year during a maintenace shut down. The
RE: B31.3 ERW