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  2. Trapezoidal thread form - Wikipedia

    en.wikipedia.org/wiki/Trapezoidal_thread_form

    The original trapezoidal thread form, and still probably the one most commonly encountered worldwide, with a 29° thread angle, is the Acme thread form (/ ˈ æ k m iː / AK-mee). The Acme thread was developed in 1894 as a profile well suited to power screws that has various advantages over the square thread , [ note 1 ] which had been the form ...

  3. Propane, butane, and LPG container valve connections

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

    No thread INT Quick coupling 19 mm (G.51) EN 15202 19 mm 0.748" No thread INT Quick coupling 20 mm (G.52) EN 15202 20 mm 0.787" No thread INT Quick coupling 21 mm (G.53) EN 15202 21 mm 0.827" No thread INT Quick coupling 21.7 mm threaded (G.57) EN 15202 21.7 mm 0.858" No thread Quick coupling 22 mm (G.54) EN 15202 22 mm 0.866 No thread

  4. List of thread standards - Wikipedia

    en.wikipedia.org/wiki/List_of_thread_standards

    Dryseal Pipe Threads (Inch) Pipe Thread Form ASME B1.20.7-1991 (R2013) Hose Coupling Screw Threads - Inch: Pipe Thread Form ASME B1.21M-1997 (R2013) Metric Screw Threads - MJ Profile: V Thread Form BS 84: Tables of BS Whitworth, BS Fine and BS Pipe Threads: V Thread Form (55°) 1 ⁄ 4 ″-20 BSW ISO 68-1:1998: ISO general purpose screw threads ...

  5. Buttress thread - Wikipedia

    en.wikipedia.org/wiki/Buttress_thread

    In oil field tubing, buttress thread is a pipe thread form designed to provide a tight hydraulic seal. The thread form is similar to that of Acme thread [10] but there are two distinct threaded portions of differing diameters and profiles, the larger having a wedging profile, with a tapered sealing portion in between the larger and smaller diameters.

  6. Threaded pipe - Wikipedia

    en.wikipedia.org/wiki/Threaded_pipe

    Therefore many municipal plumbing codes restrict the use of threaded plastic pipe fittings. Both British standard and National pipe thread standards specify a thread taper of 1:16; the change in diameter is one sixteenth the distance travelled along the thread. The nominal diameter is achieved some small distance (the "gauge length") from the ...

  7. Gas meter - Wikipedia

    en.wikipedia.org/wiki/Gas_meter

    A U.S. standard for tapered threads commonly used in piping systems to create a seal. Threads are specified by nominal pipe size (NPS) and TPI. Trapezoidal and Acme Threads. Used in applications requiring high strength and load capacity, such as lead screws. Trapezoidal threads are common in Europe, while Acme threads are more prevalent in the U.S.

  8. National pipe thread - Wikipedia

    en.wikipedia.org/wiki/National_pipe_thread

    Threaded pipe and elbow.The pipe has a male NPT thread, while the elbow is female.. American National Standard Pipe Thread standards, often called national pipe thread standards for short, are United States national technical standards for screw threads used on threaded pipes and pipe fittings.

  9. Pipe dope - Wikipedia

    en.wikipedia.org/wiki/Pipe_dope

    Petroleum-based pipe dope is not intended for use on threaded PVC, CPVC or ABS pipe and fittings since it will deteriorate the plastic. Builders in the US are expected to use thread compounds that meet ASTM F2331 - Standard Test Method for Determining Chemical Compatibility of Thread Sealants with Thermoplastic Threaded Pipe and Fittings Materials or thread seal tape on PVC, CPVC and ABS threads.

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