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2. Electrical conduit - Wikipedia

   en.wikipedia.org/wiki/Electrical_conduit

   EMT is available in trade sizes 1/2" through 4", and 10′ and 20′ lengths. Some manufacturers also produce EMT in a range of colors for easy system identification. Aluminum conduit, similar to galvanized steel conduit, is a rigid tube, generally used in commercial and industrial applications where a higher resistance to corrosion is needed.

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. Manning formula - Wikipedia

   en.wikipedia.org/wiki/Manning_formula

   Units of n are often omitted, however n is not dimensionless, having dimension of T/L 1/3 and units of s/m 1/3. R h is the hydraulic radius (L; ft, m); S is the stream slope or hydraulic gradient, the linear hydraulic head loss loss (dimension of L/L, units of m/m or ft/ft); it is the same as the channel bed slope when the water depth is ...

5. Duct (flow) - Wikipedia

   en.wikipedia.org/wiki/Duct_(flow)

   It is commonly sold as boxes containing 25' (7.5 m) of duct compressed into a 5' (1.5 m) length. It is available in diameters ranging from as small as 4" (10 cm) to as big as 18" (45 cm), but the most commonly used are even sizes ranging from 6" to 12" (15 to 30 cm).

6. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

7. Orangeburg pipe - Wikipedia

   en.wikipedia.org/wiki/Orangeburg_pipe

   The pipeline, finished in 1867, measured 1.5 miles in length and was in use through 1927. Bituminized pipe was not in widespread commercial use until the late 19th century when it was used exclusively as electrical conduit. [1] In 1893, Stephen Bradley, Sr. founded the Fiber Conduit Company in Orangeburg, New York.