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2. List of vacuum tubes - Wikipedia

   en.wikipedia.org/wiki/List_of_vacuum_tubes

   110–119 – Y8A 8-pin steel tube base; Rimlock B8A; 130–139 – Octal; 150–159 – German 10-pin with spigot; 10-pin glass with one big pin; Octal; 160–169 – Inline wire-ended Pencil tubes; Y8A 8-pin steel tube base; 170–179 – RFT 8-pin; RFT 11-pin all-glass gnome tube with one offset pin; 180–189 – Noval B9A; 190–199 ...

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. Pipe (fluid conveyance) - Wikipedia

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

   Steel pipe is still used in many homes and businesses to convey natural gas or propane fuel, and is a popular choice in fire sprinkler systems due to its high heat resistance. In commercial buildings, steel pipe is used to convey heating or cooling water to heat exchangers, air handlers, variable air volume (VAV) devices, or other HVAC equipment.

5. Sheet metal - Wikipedia

   en.wikipedia.org/wiki/Sheet_metal

   The thicknesses vary first by 1 ⁄ 32 inch in higher thicknesses and then step down to increments of 1 ⁄ 64 inch, then 1 ⁄ 128 inch, with the final increments at decimal fractions of 1 ⁄ 64 inch. Some steel tubes are manufactured by folding a single steel sheet into a square/circle and welding the seam together. [12]

6. British Standard Pipe - Wikipedia

   en.wikipedia.org/wiki/British_Standard_Pipe

   The standard ISO 228 - Pipe threads where pressure-tight joints are not made on the threads consists of the following parts: ISO 228-1:2000 Dimensions, tolerances and designation ISO 228-2:1987 Verification by means of limit gauges

7. Wheeling-Pittsburgh Steel - Wikipedia

   en.wikipedia.org/wiki/Wheeling-Pittsburgh_Steel

   The mill is now capable of producing 12 inch mini-slabs for JSW Steel's pipe and plate facility in Baytown, Texas. [19] The Follansbee, WV coke-making facility was retained by Severstal until 2014, when it was sold to AK Steel [20] The facility is currently operated as Mountain State Carbon, LLC, a wholly owned subsidiary of AK Steel. [21]