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2. List of conversion factors - Wikipedia

   en.wikipedia.org/wiki/List_of_conversion_factors

   square link (Ramsden's) sq lnk ≡ 1 lnk × 1 lnk ≡ 1 ft × 1 ft = 0.092 903 04 m 2: square metre (SI unit) m 2: ≡ 1 m × 1 m = 1 m 2: square mil; square thou: sq mil ≡ 1 mil × 1 mil = 6.4516 × 10 −10 m 2: square mile: sq mi ≡ 1 mi × 1 mi ≡ 2.589 988 110 336 × 10 6 m 2: square mile (US Survey) sq mi ≡ 1 mi (US) × 1 mi (US ...

3. Tube (fluid conveyance) - Wikipedia

   en.wikipedia.org/wiki/Tube_(fluid_conveyance)

   A tube and pipe may be specified by standard pipe size designations, e.g., nominal pipe size, or by nominal outside or inside diameter and/or wall thickness. The actual dimensions of pipe are usually not the nominal dimensions: A 1-inch pipe will not actually measure 1 inch in either outside or inside diameter, whereas many types of tubing are ...

4. Hydraulic diameter - Wikipedia

   en.wikipedia.org/wiki/Hydraulic_diameter

   For a fully filled duct or pipe whose cross-section is a convex regular polygon, the hydraulic diameter is equivalent to the diameter of a circle inscribed within the wetted perimeter. This can be seen as follows: The N {\displaystyle N} -sided regular polygon is a union of N {\displaystyle N} triangles, each of height D / 2 {\displaystyle D/2 ...

5. Template:Convert/list of units/area - Wikipedia

   en.wikipedia.org/wiki/Template:Convert/list_of...

   square decametre: dam2 Q23931040: dam 2: US spelling: square dekameter: 1.0 dam 2 (1,100 sq ft) square metre: m2 Q25343: m 2: US spelling: square meter: 1.0 m 2 (11 sq ft) m2 sqft; square decimetre: dm2 Q3331719: dm 2: US spelling: square decimeter: 1.0 dm 2 (16 sq in) square centimetre: cm2 Q2489298: cm 2: US spelling: square centimeter: 1.0 ...

6. Pipe (fluid conveyance) - Wikipedia

   en.wikipedia.org/wiki/Pipe_(fluid_conveyance)

   For pipe sizes of NPS 14 inch (DN 350) and greater the NPS size is the actual diameter in inches and the DN size is equal to NPS times 25 (not 25.4) rounded to a convenient multiple of 50. For example, NPS 14 has an OD of 14 inches or 355.60 millimetres, and is equivalent to DN 350.

7. 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 ...