Known websites operated by Nova Scotia radio stations as of 1 December 1999 listed by carrier frequency in descending order |
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Known websites operated by Nova Scotia television stations as of 1 December 1999 |
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Known websites operated by Nova Scotia radio amateurs as of 1 December 1999 listed alphabetically by call letters |
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ICS Commentary (written 20 Dec. 1999):
"20 kPag" is read "twenty kilopascals gauge." In the context of pressure measurements, "gauge" is an engineering term that means the pressure is that shown by an ordinary pressure gauge that is, the stated pressure is pressure above atmospheric, not absolute pressure. For example, when a tire manufacturer recommends an inflation pressure for an automobile tire, that recommended pressure is understood to be the "gauge" pressure, or pressure above the surrounding atmosphere. Tire manufacturers do not explicitly specify "gauge", in the correct belief that everyone will understand that the stated pressure is the reading shown by an ordinary tire pressure gauge. However, in some contexts it may be important to distinguish between "gauge" and "absolute" pressure. The operating pressure in natural gas pipes connecting to homes is one of the contexts in which it is highly desirable that the pressure be stated unambiguously which leads to the clarity of "kPag". The need to state pressure unambiguously for lower-pressure residential gas lines leads to the same usage for higher pressure pipelines such as laterals and mainlines it is best to have a consistent usage throughout the industry.
between 4,137 and 6,895 kPag. This statement, found in SOEP's website, is clear evidence that the organizations designing and operating Nova Scotia's natural gas pipelines are still working in the old Imperial system of measurements. Nominal design parameters are almost always stated in round numbers. "The expected operating pressure will be between 600 and 1000 psig" is the sort of thing one usually sees. It is most unusual to see "the expected operating pressure will be between 4,137 and 6,895 kPag." It is clear that "between 600 and 1000 psig" is the way the companies talk among themselves about these pipeline pressures. "Between 4,137 and 6,895 kPag." is the way it turned out when someone rather ineptly converted from the companies' internal usage to the usage sanctioned for media releases. This mixture of Imperial and SI metric measurements in the Nova Scotia gas pipeline operations, brings to mind the recent NASA disaster. On 1 October 1999, the Washington Post carried the following story:
The Washington Post http://www.washingtonpost.com/ |