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American Standards Association publishes ASA B33.1-1935 standard for small hose couplings (1 ⁄ 2-inch to 2"). [20] 1955 NFPA published standards for suction hose coupling threads. [11] 1956 NFPA adopts dimensions for gaskets in 3/4 inch to 6 inch couplings 1957-10 1 + 1 ⁄ 2-inch fire hose couplings were standardized. [5] 1961
A coupling whose ends use the same connection method but are of different sizes is called a reducing coupling or reducer. An example is a 3/4" NPT to 1/2" NPT coupling. An example is a 3/4" NPT to 1/2" NPT coupling.
The fitting is known as a reducing coupling, reducer, or adapter if their sizes differ. There are two types of collars: "regular" and "slip". A regular coupling has a small ridge or stops internally to prevent the over-insertion of a pipe and, thus, under-insertion of the other pipe segment (which would result in an unreliable connection).
Storz couplings are available in several sizes, supporting hoses with an internal diameter of between 12 and 250 mm, and are specified by DIN standards 14301, 14321, 14322, and 14323 (hose couplings); DIN standards 14306, 14307, 14308, and 14309 (threaded adapters); DIN standards 14341, 14342, and 14343 (swivel reducers); and DIN standards ...
Storz is a type of hose coupling invented by Carl August Guido Storz in 1882 and patented in Switzerland in 1890, and patented in the U.S. in 1893 [1] that connects using interlocking hooks and flanges. It was first specified in standard FEN 301-316, and has been used by German fire brigades since 1933.
For hoses and piping, a quick connect fitting, also called a push fitting, is a coupling used to provide a fast, make-or-break connection of gas or liquid transfer lines. Operated by hand, quick connect fittings replace threaded or flanged connections, which require wrenches. When equipped with self-sealing valves, quick connect fittings will ...
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