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2. Piping and plumbing fitting - Wikipedia

   en.wikipedia.org/wiki/Piping_and_plumbing_fitting

   Flare connection: 1) Screw thread; 2) O-ring; 3) Body; 4) Nut; 5) Seal interface; 6) Support ring (sleeve), and 7) Flared tubing. Flared connectors should not be confused with compression connectors, which are generally not interchangeable. Lacking a compression ring, they use a tapered conical shaped connection instead. A specialized flaring ...

3. Hose coupling - Wikipedia

   en.wikipedia.org/wiki/Hose_coupling

   Side view of a 1.5 to 2.5 inches (38 to 64 mm) adapter. National Hose thread (NH), also known as National Standard Thread (NST). It is the most common type of fire hose coupling used in the United States.

4. Compression fitting - Wikipedia

   en.wikipedia.org/wiki/Compression_fitting

   A compression fitting 15 mm isolating valve. A compression fitting is a fitting used in plumbing and electrical conduit systems to join two tubes or thin-walled pipes together. . In instances where two pipes made of dissimilar materials are to be joined (most commonly PVC and copper), the fittings will be made of one or more compatible materials appropriate for the connect

5. North American Fire Hose Coupler Incompatibilities - Wikipedia

   en.wikipedia.org/wiki/North_American_Fire_Hose...

   1-inch hose with 1-8 NH NFPA threads (NFPA 1963 requirement; a.k.a. "Chemical Hose Thread" and "Booster Hose Thread" [7]; the chemical hose thread term likely originates from its use on chemical fire engines, an early firefighting device used from 1872 until the 1930s that used a combination of bicarbonate of soda and sulfuric acid to force ...

6. National pipe thread - Wikipedia

   en.wikipedia.org/wiki/National_pipe_thread

   The half-angle (between the taper surface and the axis of the pipe) is arctan(1 ⁄ 32) ≈ 1.7899° ≈ 1° 47′. The standard for Nominal Pipe Size (often abbreviated NPS, which should not be confused with the abbreviation NPS for the straight thread form standard) is loosely related to the inside diameter of Schedule 40 series of sizes.

7. Propane, butane, and LPG container valve connections

   en.wikipedia.org/wiki/Propane,_butane,_and_LPG...

   1" No thread Quick coupling 27 mm (G.59) EN 15202 27 mm 1.063" No thread Quick coupling 35 mm Jumbo (G.56) EN 15202 35 mm 1.378" No thread Quick coupling bayonet (G.61) EN 15202 No thread Quick Coupling Fork Lift (G.66) EN 15202 No thread Quick Coupling Fork Lift Bayonet (G.65) EN 15202 No thread SAEF 1/2" SAEF 12.7 mm 1.954 mm 1/2" 13 TPI