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- W32282562 abstract "Several years ago a series of tests was made by the Bureau of Investigation and Design of the Department of Water Supply, Gas and Electricity, New York City, to determine the losses of head in corporation or service cocks and service pipes. The results of these tests may prove of value to the water works profession, particularly the tests of corporation cocks, there being very little data available on that subject. All sizes in use by the department at that time were tested. Of the two largest sizes four of each type were tested and of the smaller sizes, two of each type. Of the lead and galvanized service pipes four lengths of each size about 15 feet long were tested. The observations were very carefully made, the losses being measured by mercury deflections, and the discharges by a 2-inch meter of the current type. This type was selected rather than a meter of the disc type, as the flow through the latter caused considerably more vibration and fluctuations of the mercury deflections than a meter of the current type. The same meter was used during the entire series. It was rated on a testing machine at the beginning and end of the tests, the exact discharge at the various rates being determined by weighing. The corporation cocks were inserted in a length of 12-inch cast iron pipe, capped and plugged at the ends, by a tapping machine in the usual manner. The main was connected to a fire hydrant through the plugged end by means of a short piece of 4-inch galvanized iron pipe. The cocks were set about a foot apart, the 2inch cocks being set nearest the capped end of the pipe in order to eliminate any uncertainties due to swirls at the high rates of flow." @default.
- W32282562 created "2016-06-24" @default.
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- W32282562 date "1918-09-01" @default.
- W32282562 modified "2023-09-26" @default.
- W32282562 title "Loss of Head in Corporation Cocks and Service Pipes" @default.
- W32282562 doi "https://doi.org/10.1002/j.1551-8833.1918.tb11666.x" @default.
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