Pipe Terminology
Pipe Terminology
(OP)
In a potable water system, say a 12" watermain, what is the correct way to refer to a short piece of pipe, say between fitting, etc. Pipe spool is something that is made in the factory to a specified length, but I'm talking about something that is likely going to be fabricated / cut in the field for fit-up. I don't believe a "nipple" is correct either for something like a 12" dia DIP. Is there an industry standard for a short piece of field fabricated piece of pipe required to fit up a particular connection or assembly? Thank you.





RE: Pipe Terminology
No idea why but that's what everyone calls it!
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RE: Pipe Terminology
- Rico Perdana Putra -
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RE: Pipe Terminology
Especially if it's cut to fit on site and less than about 3D in length it magically becomes a "pup piece"...
Don't get anyone started on the minimum distance argument - this has been examined many many times on this site - just do a search on "minimum distance welds"....
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Pipe Terminology
A pup piece is a very short length of pipe in a welded piping system which is eventually welded into the pipe segment. Typically less than 6-Inch long although there are no defined rules.
Ductile iron piping is generally not welded, but may be in some circumstances. However, it is not practical to weld a very short length of ductile iron pipe.
For ductile iron water mains, pipe spool is probably more appropriate terminology.
RE: Pipe Terminology
RE: Pipe Terminology
RE: Pipe Terminology
Although there is no strict rule for defining a "pup" piece, anything over 1'-0" in length is no longer considered a "pup" piece. It is simply a piece of pipe. The OP is correct in assuming that a short piece of pipe on a 12" diameter line is not a nipple. A nipple is used in threaded or socket welded connections but is still generally limited to 1'-0" or less.
"Pup" is the correct terminology for a short piece of butt welded piping.
This topic has been brought up many times in the past. Do a forum search on "pup pipe" or "pup piece of pipe" and read some of the past threads.
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