Thank you all for the guidance.
Never had the opportunity to see pipeline being welded up. Having multiple welders working together explains a lot.
FYI these are not cross country. None more than a few miles. Can't say anymore than that.
A lot of 36" - 48", 1" wall, API 5L-60.
Looking at the link for thick wall welds, the detail shows 10 passes using vertical welds for a 1" thick wall. On a 36" diameter pipe that's 3.1416*36*10 = 1131 inches of weld. Even at 100"/hr, that's a full day's work.
Which brings me back to the "per...
Hello everyone,
Wondered if anyone had any experience with this:
B31.4 2016 Para. 434.8.5.3 states that above a hoop stress of 20% of yield, a minimum of 10% of girth welds "completed each day" are to be inspected.
What does this mean for large pipes where one girth weld takes most or all of...
Hello,
I have an API-650 tank, with two 24" nozzles. One nozzle has internal piping going back to the center of the tank, the other has none. The internal piping would be supported about every 20' with goalpost type supports (no hold-downs). I am trying to determine what effect the internal...
For the PE who has to stamp the iso - having a note that says "See Line List" for the design conditions and hydrotest pressure is a bit like signing a blank check.
I have always seen face of flange set at least 12" above top of grade. That's for process or cooling water lines. Drain lines probably aren't as critical.
Probably a negative movement in the gravity case. Then a positive movement in the thermal case. The thermal movement will then be the absolute sum of the two, therefore greater than 3mm.
We have some existing A105N, B16.5 flanges that have not been impact tested. New upset conditions would be -48C at nearly atmospheric pressure for 15-30 minutes. Most of the time it will be at ambient. We have done pipe stress analysis and checked flange leakage, both are fine based on...
Here's one reason not to rest bare pipe on round bar. See attached below.http://files.engineering.com/getfile.aspx?folder=013bf15d-7bcb-42b4-9ed8-b0a060205a13&file=Round_Bar_Erosion.pdf
