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  2. Pipe plug - Wikipedia

    en.wikipedia.org/wiki/Pipe_plug

    Pipe plugs are used with supplementary accessories such as air and water hoses, air and pressure control devices, gauges, adapters and chains depending on the type of the pipe plug and the process. Auxiliary equipment like compressors for inflating the pipe plugs, water tanks for filling the pipeline and pumps for some cases must be used.

  3. Weld purging - Wikipedia

    en.wikipedia.org/wiki/Weld_purging

    Inflatable pipe purging systems are the most commonly used, where two inflatable bags (known as dams) are connected by an inert gas tube about 20” (500 mm) in length with one dam placed either side of the weld. The space between the dams is filled with inert gas that flushes out the air.

  4. Nipple (plumbing) - Wikipedia

    en.wikipedia.org/wiki/Nipple_(plumbing)

    A close nipple can only be unscrewed by gripping one threaded end with a pipe wrench which will damage the threads and necessitate replacing the nipple, or by using a specialty tool known as a nipple wrench (or known as an internal pipe wrench) which grips the inside of the pipe, leaving the threads undamaged. When the ends are of two different ...

  5. List of inflatable manufactured goods - Wikipedia

    en.wikipedia.org/wiki/List_of_inflatable...

    An inflatable laser maze This is a non-comprehensive list of inflatable manufactured goods , as no such list could ever completely contain all items that regularly change. An inflatable [ 1 ] is an object that can typically be inflated with a gas , including air , hydrogen , helium and nitrogen .

  6. Piping and plumbing fitting - Wikipedia

    en.wikipedia.org/wiki/Piping_and_plumbing_fitting

    The bodies of fittings for pipe and tubing are often the same base material as the pipe or tubing connected: copper, steel, PVC, CPVC, or ABS. Any material permitted by the plumbing, health, or building code (as applicable) may be used, but it must be compatible with the other materials in the system, the fluids being transported, and the ...

  7. Fusible plug - Wikipedia

    en.wikipedia.org/wiki/Fusible_plug

    A fusible plug operates as a safety valve when dangerous temperatures, rather than dangerous pressures, are reached in a closed vessel. In steam boilers the fusible plug is screwed into the crown sheet (the top plate) of the firebox, typically extending about 1 in (25 mm) into the water space above it. Its purpose is to act as a last-resort ...

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