This articleneeds additional citations forverification.(August 2007) |
Inplumbingandpiping,anippleis a fitting, consisting of a short piece ofpipe,usually provided with amalepipe threadat each end, for connecting two other fittings.
The length of the nipple is usually specified by the overall length with thread. 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 apipe wrenchwhich will damage the threads and necessitate replacing the nipple, or by using a specialty tool known as anipple 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.
Chase nipple
editA chase nipple is a short pipe fitting, which creates a path for wires between twoelectrical boxes.A chase nipple has male threads on one end only. The other end is a hexagon. The chase nipple passes through theknockoutsof two boxes, and is secured by an internally threaded ring called a lock nut.[1][2]
Chase-Shawmut Company, ofBoston,is the company which first produced chase nipples.[3]
See also
editReferences
edit- ^Zachariason, Rob (2012).Electrical materials.Clifton Park, N.Y.: Delmar, Cengage Learning. p. 90.ISBN978-1111640064.
- ^"2 Inch Chase Nipple, Malleable Iron with Dura Plate Finish for Use with Rigid/IMC Conduit".Thomas & Betts Corporation.2018. Archived fromthe originalon May 21, 2018.
- ^William Dixon Weaver; Jonathan E. Woodbridge; Cecil Percy Poole, eds. (1900).American Electrician.Vol. 12. Princeton University. p. 550.
Further reading
edit- ASTM A733-03 Standard Specification for Welded and Seamless Carbon Steel and Austenitic Stainless Steel Pipe Nipples.
- ASTM B687-99(2005)e1 Standard Specification for Brass, Copper, and Chromium-Plated Pipe Nipples.
- ASME B1.20.7 Hose Coupling Screw Threads, Inch. (Quote:The normal sequence of connections, in relation to the direction of flow, is from an externally threaded nipple into an internally threaded coupling)
External links
edit- Chase Nipple: Bushed Nipple.Electricians Library.Archivedfrom the original on 2021-12-21 – via YouTube ". Shows a 2-inch chase nipple.
{{cite AV media}}:CS1 maint: postscript (link)