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  2. Pipe marking - Wikipedia

    en.wikipedia.org/wiki/Pipe_marking

    Background Color Text Color Example Flammables [b] & Oxidizers [c] Safety Yellow Black Acetylene: Combustible Fluids [d] Safety Brown White Lubricating Oil: Toxic and Corrosives Safety Orange White Ammonia: Water Safety Green White Stormwater: Compressed air/Non-hazardous gases Safety Blue White Compressed Air: Firefighting materials Safety Red ...

  3. Piping and instrumentation diagram - Wikipedia

    en.wikipedia.org/wiki/Piping_and_instrumentation...

    The identifications consist of up to 5 letters. The first identification letter is for the measured value, the second is a modifier, 3rd indicates passive/readout function, 4th - active/output function, and the 5th is the function modifier. This is followed by loop number, which is unique to that loop.

  4. Pipe network analysis - Wikipedia

    en.wikipedia.org/wiki/Pipe_network_analysis

    In this formulation, first you go through and create guess values for the flows in the network. The flows are expressed via the volumetric flow rates Q. The initial guesses for the Q values must satisfy the Kirchhoff laws (1). That is, if Q7 enters a junction and Q6 and Q4 leave the same junction, then the initial guess must satisfy Q7 = Q6 + Q4.

  5. List of electronic color code mnemonics - Wikipedia

    en.wikipedia.org/wiki/List_of_electronic_color...

    The first letter of the color code is matched by order of increasing magnitude. The electronic color codes, in order, are: The electronic color codes, in order, are: 0 = B lack

  6. HEC-RAS - Wikipedia

    en.wikipedia.org/wiki/HEC-RAS

    3D view. HEC-RAS is simulation software used in computational fluid dynamics – specifically, to model the hydraulics of water flow through natural rivers and other channels.. The program was developed by the United States Army Corps of Engineers in order to manage the rivers, harbors, and other public works under their jurisdiction; it has found wide acceptance by many others since its ...

  7. Banjo fitting - Wikipedia

    en.wikipedia.org/wiki/Banjo_fitting

    It is typically used to connect a fluid line to a rigid, internally threaded hydraulic component. The bolt is assembled through the center of the union, usually with face seals on either side of the union, to create a fluid path between the external ports on the union and bolt. A flexible hose or a rigid pipe may be connected to the union port. [1]

  8. List of RAL colours - Wikipedia

    en.wikipedia.org/wiki/List_of_RAL_colours

    Possible lightness values are 15% through 90% in steps of 5% for monochromatic shades of grey (i.e. C = 0%) and 20% through 90% in steps of 10% and additionally 85% and 93%. Chroma values are also mostly confined to steps of 10% or 5%, but with some exceptions, and the maximum value varies.

  9. Net positive suction head - Wikipedia

    en.wikipedia.org/wiki/Net_positive_suction_head

    Example Number 3: A well or bore running at 70 degrees Celsius (158F) with an operating level of 5 metres below the intake, minus a 2 metre friction loss into pump (pipe loss), minus the NPSH R curve (say 2.4 metres) of the pre-designed pump, minus a temperature loss of 3 metres/10 feet = an NPSH A (available) of (negative) -12.4 metres.

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