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NFPA published standards for smaller hose threads. [11] 1924 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).
National hose thread, also known as NST (National Standard Thread). Commonly used in fire hose couplings, it has a slightly larger thread diameter and coarser pitch (fewer threads per inch) than the alternative NPSH thread. The threads specified in NFPA 1963 are "NH". [13] NIFTI Naval InFrared Thermal Imager.
National Pipe Taper Fuel (NPTF, also called Dryseal American National Standard Taper Pipe Thread, defined by ASME B1.20.3) is designed to provide a more leak-free seal without the use of PTFE tape (often referred to by the popular brand name "Teflon") or another sealant compound. NPTF threads have the same basic shape but with crest and root ...
Spanish fire hose coupling. This coupling is used by Spanish firefighters, and is defined by Spanish Standard UNE 23400. [15] It is a sexless coupling with three engaging lugs, and is available in several different sizes, including Barcelona 25 (25 mm hose ID), Barcelona 45 (45 mm hose ID), and Barcelona 70 (70 mm hose ID).
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).
The US standard was defined by NFPA 1963, "Standard for Fire Hose Connections", [2] then later by ANSI-ASME B1.20.7, [3] which specifies 1 + 1 ⁄ 16 inches (27 mm) diameter straight (non-tapered) thread with a pitch of 11.5 threads per inch (TPI). The female thread is abbreviated FHT (for "female hose thread"), and the male part is abbreviated ...
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