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  2. Ductile iron pipe - Wikipedia

    en.wikipedia.org/wiki/Ductile_iron_pipe

    A study by Jeschar et al. in 1995 compared the energy use and carbon dioxide (CO 2) emissions produced in manufacturing pipes of various materials including concrete, ductile iron, cast iron and PVC, based on pipes with nominal diameter of 100 mm to 500 mm.

  3. 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 ...

  4. Piping and plumbing fitting - Wikipedia

    en.wikipedia.org/wiki/Piping_and_plumbing_fitting

    A reducer reduces the pipe size from a larger to a smaller bore (inner diameter). Alternatively, reducer may refer to any fitting which causes a change in pipe diameter. [ 15 ] This change may be intended to meet hydraulic flow requirements of the system or adapt to existing piping of a different size.

  5. Mechanical systems drawing - Wikipedia

    en.wikipedia.org/wiki/Mechanical_systems_drawing

    Purpose made brackets for supporting service or plant/equipment to a scale of not less than 1:50; Accesses into ceilings, ducts, etc. at a scale of not less than 1:50; Special fixings, inserts, brackets, anchors, suspensions, supports etc. at a scale of not less than 1:20; Sleeves, puddle flanges, access chambers at a scale not less than 1:20

  6. Hose clamp - Wikipedia

    en.wikipedia.org/wiki/Hose_clamp

    The size of clamp should be chosen such that the ear(s) are almost completely closed on installation. Other features of this style of clamp include: narrow band widths, intended to provide a concentrated compression of the hose or tube; and tamper resistance , due to the permanent deformation of the clamp’s “ear”.

  7. Organ flue pipe scaling - Wikipedia

    en.wikipedia.org/wiki/Organ_flue_pipe_scaling

    The sound of an organ pipe is made up of a set of harmonics formed by acoustic resonance, with wavelengths that are fractions of the length of the pipe.There are nodes of stationary air, and antinodes of moving air, two of which will be the two ends of an open-ended organ-pipe (the mouth, and the open end at the top). [1]

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