Examination of Vapor-measuring Devices for Liquefied Petroleum Gas: A Manual for Weights and Measures Officials, Issue 117U.S. Department of Commerce, National Bureau of Standards, 1975 - 18 pages |
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Page 1
... cause a pressure drop across the meter of 1 / 2 - inch WC . check rate . A rate of flow usually 20 to 35 percent of the capacity rate . and cubic - foot bottle . A specially constructed calibrated metal bottle open at the lower end and ...
... cause a pressure drop across the meter of 1 / 2 - inch WC . check rate . A rate of flow usually 20 to 35 percent of the capacity rate . and cubic - foot bottle . A specially constructed calibrated metal bottle open at the lower end and ...
Page 2
... caused by pilot lights . m3 / h . Cubic meters per hour . meter register . An observation index for the cumula- tive reading of the gas flow through the meter . In addition there are one or two proving circles in which one revolution of ...
... caused by pilot lights . m3 / h . Cubic meters per hour . meter register . An observation index for the cumula- tive reading of the gas flow through the meter . In addition there are one or two proving circles in which one revolution of ...
Page 4
... cause and make corrections before using the prover for testing meters . It is possible that the prover may not remain at zero , as expansion or contraction due to tempera- ture changes and barometric pressure changes over- night may cause ...
... cause and make corrections before using the prover for testing meters . It is possible that the prover may not remain at zero , as expansion or contraction due to tempera- ture changes and barometric pressure changes over- night may cause ...
Page 5
... cause leaks . When not in use , the circular slide- valve should be covered to keep out dust . 3.2 Prover Calibration There are two basic methods of calibrating a bell prover , " bottling " or " strapping " [ 3 , 4 ] . " Bottling " a ...
... cause leaks . When not in use , the circular slide- valve should be covered to keep out dust . 3.2 Prover Calibration There are two basic methods of calibrating a bell prover , " bottling " or " strapping " [ 3 , 4 ] . " Bottling " a ...
Page 6
... caused by liquid displaced by metal in bell and scale . M = Volume of metal that becomes immersed in liquid . S = Volume of metal scale buttons , guide rods , and thermometers that becomes immersed in liquid . T = Volume of liquid rise ...
... caused by liquid displaced by metal in bell and scale . M = Volume of metal that becomes immersed in liquid . S = Volume of metal scale buttons , guide rods , and thermometers that becomes immersed in liquid . T = Volume of liquid rise ...
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Common terms and phrases
adapter fittings Altitude corrections factors atmospheric pressure automatic data processing Bureau of Standards butane calibration capacity rate commercial Corrected Prover Volume Corrected to 60 correction factors metric cubic feet cubic foot bottle cubic foot standard cubic meter customary units cycloid Devices for Liquefied diameter differential pressure gage Error in Delivery Examination of Vapor-Measuring Exterior view FIGURE Indication Meter Indication leak liquefied petroleum gas LPG Vapor Meter measures officials Measuring Devices metal Meter Indication Meter Meter Proving Circle meter under test metric units National Bureau Office orifice plate portable cubic foot position pressure drop prover bell prover oil prover outlet valve prover pressure prover room prover scale prover tank prover valve proving room psia Rate cap holder sample report form sealing liquid sealing medium Specific Gravity strapping temperature compensated meter Test data section test hand Test Report Form thermometers U.S. DEPARTMENT U.S. Government Printing Vapor-Measuring Devices weights and measures