Search results
Results from the WOW.Com Content Network
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 ...
The size of CRTs increased over time, from 20 inches in 1938, [52] [a] to 21 inches in 1955, [54] [55] 25 inches by 1974, 30 inches by 1980, 35 inches by 1985, [56] and 43 inches by 1989. [57] The world largest was the Sony KX45ED1 at 45 inches but only one known working model exists. [58] [59] In 1960, the Aiken tube was invented. It was a CRT ...