Hutchison Pipeline Flow Calculator; Gas, Air, Oil, Water

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Country of manufacture: USA,            Date of manufacture: ____
Diameter: 22.5 cm diameter disk mounted on 25 cm square back.
Materials: Plastic laminate
Cursor: All plastic; lines = abs. press. and sp. gravity corrections for all formulae)
Scales on Backplane: F (pressure scale for solving probs using Panhandle formula and for hi pressure gas and air is read as the difference of the squares of the abs pressures), A (pressure scale, for hi pressure gas and air (Weymouth) is read as difference of the squares of the abs pressures; for lo pressure gas as the pressure drop in inches of water; for oil as the pressure drop in lbs per sq ft; for water the friction loss of head in feet), D (volume scale for all cases)
Scales on Disk: E (length in miles, used with "F" and the inside ring of "C" when using the Panhandle formula), B (length (in ft for LP gas and water, miles for HP gas (Weymouth) and Oil), C (pipe size scale containing pipe size constants for all formula, in inches - note: this scale has five sections)
Back: blank
Condition: C3 Very (Minimal signs of use)
Came with: Manilla Folder, Pressure Table, and 7-page instruction manual

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Pressure Table (actual dimensions: 25.3 cm X 10.9 cm or 10.0 in. X 4.3 in.)