"Darts" in pipe
"Darts" in pipe
(OP)
We want to weld a 36" OD weld cap on a 36" ID standard pipe. Some of our older piping uses "darts" to align similar configurations. The larger pipe has 4 to 6 axial slits, about 6" long, which are full-pen welded to draw in the OD of the pipe. Is this an acceptable configuration?
I'm more familiar with "dart" as a sewing term......
I'm more familiar with "dart" as a sewing term......
Larry





RE: "Darts" in pipe
saxon
RE: "Darts" in pipe
We're working with 165 psig dry air at 100°F. We usually use 5% random radiography. If we go with the darts, we're doing an in-process exam with our Level III NDE guy. I'm comfortable with the darts, I just hadn't seen them before and wondered how common they are. We're talking 1940's vintage piping.
Larry
RE: "Darts" in pipe
saxon
RE: "Darts" in pipe
Larry
RE: "Darts" in pipe
RE: "Darts" in pipe
RE: "Darts" in pipe
That replacement was part of my then-company's tasks. We replaced the WWII vintage butt-end brittle pipe with beveled end pipe good to -20°F. Yep, I've been through Plumbrook too.
Larry