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[10] [11] There are several possible reasons why these connections failed. The two main reasons were improper installations (poor workmanship) and the differences in the coefficient of expansion between aluminum wire used in the 1960s to mid-1970s and the terminations, particularly when the termination was a steel screw on an electrical device.
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 ...
In North America and the UK, pressure piping is usually specified by Nominal Pipe Size (NPS) and schedule (SCH). Pipe sizes are documented by a number of standards, including API 5L, ANSI/ASME B36.10M (Table 1) in the US, and BS 1600 and BS 1387 in the United Kingdom. Typically the pipe wall thickness is the controlled variable, and the Inside ...
Pipe threads for tubes and fittings; parallel internal thread and taper external thread; tread dimensions: Withdrawn: DIN EN 10226-1: EN 10226-1: DIN 2999-2: Whitworth Pipe Threads for Tubes and Fittings; Cylindrical Internal Thread and Conical External Thread, Gauging System and Use of Gauges: Withdrawn: DIN EN 10226-3: EN 10226-3: DIN 2999-3
The weight per unit length diminishes by an average of approximately 20% at each step. Because the weight per unit length is related to the cross sectional area, and therefore to the square of the diameter, the diameter diminishes by approximately 10.6%:
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Between each step the diameter, or thickness, diminishes by 10.557%, and the area and weight diminish by ~ 20%. None of the above systems of measurement is part of the metric system . The current British Standard for metallic materials including wire is BS 6722 :1986, which is a solely metric standard, superseding 3737:1964, which used the SWG ...
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