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  2. Nominal Pipe Size - Wikipedia

    en.wikipedia.org/wiki/Nominal_Pipe_Size

    Nominal Pipe Size (NPS) is a North American set of standard sizes for pipes used for high or low pressures and temperatures. [1] " Nominal" refers to pipe in non-specific terms and identifies the diameter of the hole with a non-dimensional number (for example – 2-inch nominal steel pipe" consists of many varieties of steel pipe with the only criterion being a 2.375-inch (60.3 mm) outside ...

  3. Double-walled pipe - Wikipedia

    en.wikipedia.org/wiki/Double-walled_pipe

    It is a pipe within a pipe, or encased in an outer covering, with an annulus (interstitial space) between the two diameters. The inner pipe is the primary or carrier pipe and the outer pipe is called the secondary or containment pipe. The great majority of double-walled piping applications involve wastewater, groundwater, and process safety. [1]

  4. Birmingham gauge - Wikipedia

    en.wikipedia.org/wiki/Birmingham_gauge

    The Birmingham gauge ranges from 5/0 or 00000, the lowest gauge number corresponding to the largest size of 0.500 inches (12.7 mm), to 36, the highest gauge number corresponding to the smallest size of 0.004 inches (0.10 mm). The increments between gauge sizes are not linear and vary. [2] At higher gauge numbers, the increment between the two ...

  5. Piping and plumbing fitting - Wikipedia

    en.wikipedia.org/wiki/Piping_and_plumbing_fitting

    This fitting (also known as a "bungalow fitting" or a "cottage fitting") is a sanitary tee that allows two trap arms to be connected at the same level. A toilet is the main connection, with the option of a right or left-hand outlet to the 3" inlet with a choice of 1-1/2" or 2" in size.

  6. British Standard Pipe - Wikipedia

    en.wikipedia.org/wiki/British_Standard_Pipe

    British Standard Pipe (BSP) is a set of technical standards for screw threads that has been adopted internationally for interconnecting and sealing pipes and fittings by mating an external thread with an internal (female) thread.

  7. Trench drain - Wikipedia

    en.wikipedia.org/wiki/Trench_drain

    Channels can range from 1 inch (2.5 cm) to 2 feet (61 cm) in width, while depths can reach up to 4 feet (120 cm). Trench drains are commonly confused with French drains , which consist of a perforated pipe that is buried in a gravel bed, and which are used to evacuate ground water.

  8. Perforated metal - Wikipedia

    en.wikipedia.org/wiki/Perforated_metal

    Studies have shown that perforated metals help reduce sound levels. [4] Studies have shown that having buildings use perforated metal sheets in front of their façade can bring in one study 29% energy savings (HVAC + Lighting estimated consumption in 1 year) and in the second one 45% energy savings (heating, ventilation, air conditioning).

  9. List of tram systems by gauge and electrification - Wikipedia

    en.wikipedia.org/wiki/List_of_tram_systems_by...

    Last part of Edmonton Radial Railway (1908-1951) (same gauge) Nelson Electric Tramway: 1.2 km 1,435 mm (4 ft 8 + 12 in) 600 V Heritage streetcar: Ottawa Confederation Line: 12.5 km 1,435 mm (4 ft 8 + 12 in) 1500 V Ottawa Electric Railway (1891-1959) with the same gauge Toronto streetcar system: 83 km 4 ft 10 + 7 ⁄ 8 in (1,495 mm) 600 V

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