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Coupling for hose and pipe. US 894900 A [2] 1915: Coupling. ... two sizes: 1 + 1 ⁄ 2-inch ... made of brass and the male coupling lacks the rubber O-ring found on ...
Alternatively it is a short length of pipe with two female National pipe threads (NPT) (in North American terms, a coupler is a double female while a nipple is double male) or two male or female British standard pipe threads. If the two ends of a coupling are of different standards or joining methods, the coupling is called an adapter. Examples ...
National Screw Thread Commission updates its small hose screw couplings. Covers "National Fire-Hose Coupling Thread Form" (NFHCT) recommended by NFPA "previously known as National Standard Hose Coupling Thread" and garden hoses (3/4 in.--11 1/2 threads per inch). Small hose couplings (0.5 to 2") use "National Form of Thread".
[22]: 149 Instead, pipe and fittings with plain (non-belled) connections are butted against each other, and clamped with special rubber sleeve (or "no-hub") fittings. [19]: 71 The rubber sleeves are typically secured with stainless steel worm drive clamping bands, which compress the rubber to make a tight seal around the pipes and fittings.
The 100 mm (4-inch) and 125 mm (5-inch) Storz couplers have been specified in NFPA 1963, Standard for Fire Hose Connections, since the 1993 edition. U.S. cities that have fire hydrants with 125 mm Storz connectors include Raleigh, NC [ 5 ] and the City of Corvallis, OR (adapter on 4-inch threaded outlet).
Screw clamps are normally used for hoses 1/2 inch diameter and up, with other clamps used for smaller hoses. The first patent for a worm-drive hose clamp was granted to Swedish inventor Knut Edwin Bergström [ se ] in 1896 [ 1 ] Bergström founded “Allmänna Brandredskapsaffären E. Bergström & Co.” in 1896 (ABA) to manufacture these worm ...
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