More accurate measurement standards developed for use in world trade

Journal Article · Sun Aug 01 04:00:00 EDT 1976 · Gas Ind., Nat. Gas Ed.; (United States)

OSTI ID:7068845

National Bureau of Standards cryogenic engineers in Boulder, Colo., have been working with LNG mixtures at temperatures down to -260/sup 0/F for years (see also Gas Abstr. 32, 76-0868). An important NBS contribution is the accurate determination of the thermophysical properties of pure methane from 90 to 500/sup 0/K at pressures to 70 MPa. An NBS study of the thermophysical properties of compressed and liquefied ethane is now updating provisional thermodynamic-property tables covering the temperature range of 90 to 600/sup 0/K at pressures to 70 MPa; a similar project for propane was initiated this year. A recently published bibliography provides cryogenic data on equilibrium properties of fluid mixtures. In response to industrial needs, NBS in 1972 initiated a study of the orthobaric densities of liquefied hydrocarbon gases and their mixtures. Data obtained will greatly improve the reliability of worldwide custody-transfer operations. A magnetic suspension densimeter has been used to obtain accurate orthobaric density data for liquefied methane, ethane, propane, butane, and nitrogen. The size and complexity of the international and interstate measurement system provides NBS with many new opportunities in the traditional areas of measurement.

• OSTI ID: 7068845
• Journal Information: Gas Ind., Nat. Gas Ed.; (United States), Journal Name: Gas Ind., Nat. Gas Ed.; (United States) Vol. 20; ISSN GINGA
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
033000* -- Natural Gas-- Properties & Composition
090110 -- Hydrocarbon Fuels-- Properties-- (1979-1989)
10 SYNTHETIC FUELS
ALKANES
CRYOGENIC FLUIDS
DENSITY
ENERGY SOURCES
EQUILIBRIUM
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HIGH TEMPERATURE
HYDROCARBONS
LIQUEFIED NATURAL GAS
LOW TEMPERATURE
MEDIUM TEMPERATURE
METHANE
NATIONAL ORGANIZATIONS
NATURAL GAS
NATURAL GAS LIQUIDS
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
TRADE
US NBS