| 词条 | Nipple (plumbing) |
| 释义 |
In plumbing and piping, a nipple is a fitting, consisting of a short piece of pipe, usually provided with a male pipe thread at each end, for connecting two other fittings. The length of the nipple is usually specified by the overall length with threads. It may have a hexagonal section in the center for a wrench to grasp (sometimes referred to as a "hex nipple"), or it may simply be made from a short piece of pipe (sometimes referred to as a "barrel nipple" or "pipe nipple"). A "close nipple" has no unthreaded area; when screwed tightly between two female fittings, very little of the nipple remains exposed. A close nipple can only be unscrewed by gripping one threaded end with a pipe wrench which will damage the threads and necessitate replacing the nipple, or by using a specialty tool known as a nipple wrench (or known as an internal pipe wrench) which grips the inside of the pipe, leaving the threads undamaged. When the ends are of two different sizes it is called a reducer or unequal nipple. Threads used on nipples are BSP, BSPT, NPT, NPSM and Metric. Chase nippleA chase nipple is a short pipe fitting, which creates a path for wires between two electrical boxes. A chase nipple has male threads on one end only. The other end is a hexagon. The chase nipple passes through the knockouts of two boxes, and is secured by an internally threaded ring called a lock nut.[1][2] Chase-Shawmut Company, of Boston, is the company which first produced chase nipples.[3] See also
References1. ^{{cite book | last=Zachariason | first=Rob | title=Electrical materials | publisher=Delmar, Cengage Learning | location=Clifton Park, N.Y. | year=2012 | page=90 | isbn=1111640068 }} 2. ^{{cite web |title=2 Inch Chase Nipple, Malleable Iron with Dura Plate Finish for Use with Rigid/IMC Conduit |publisher=Thomas & Betts Corporation |date=2018 |archivedate=May 21, 2018 |url=https://web.archive.org/web/20180521190509/http://www-public.tnb.com/ps/fulltilt/index.cgi?part=040847&co=US}} 3. ^{{cite book |title=American Electrician |volume=12|editors=William Dixon Weaver, Jonathan E. Woodbridge, Cecil Percy Poole |page=550 |publisher=Princeton University |date=1900}} Further reading
External links
2 : Plumbing|Piping |
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