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ASTM E126 - STANDARD TEST METHOD FOR INSPECTION, CALIBRATION, AND VERIFICATION OF ASTM HYDROMETERS Organization: ASTM
Date: 2013-11-01
Description: This test method describes the principles, apparatus, and procedures for the inspection, calibration, and verification of ASTM glass hydrometers. This test method is applicable to ASTM hydrometers and may be used for other general hydrometers of the constant-mass, variable-displacement type.
ASTM E126 + REDLINE - STANDARD TEST METHOD FOR INSPECTION, CALIBRATION, AND VERIFICATION OF ASTM HYDROMETERS - INCLUDES STANDARD + REDLINE (PDF) Organization: ASTM
ASTM D287 - STANDARD TEST METHOD FOR API GRAVITY OF CRUDE PETROLEUM AND PETROLEUM PRODUCTS (HYDROMETER METHOD) Organization: ASTM
Date: 2012-06-01
Description: The initial values obtained are uncorrected hydrometer readings and not density measurements. Values are measured on a hydrometer at either the reference temperature or at another convenient temperature, and readings corrected for the meniscus effect, the thermal glass expansion effect, alternate calibration temperature effects and to the reference temperature by means of volume correction tables.
NBN - EN ISO 3993 - LIQUEFIED PETROLEUM GAS AND LIGHT HYDROCARBONS - DETERMINATION OF DENSITY OR RELATIVE DENSITY - PRESSURE HYDROMETER METHOD (ISO 3993:1984) Organization: NBN
Date: 1995-11-01
Description: Alternative calibration procedures are described, but only the one using a certified hydrometer is suitable for the determination of density to be used in calculations of qualities for custody transfer or fiscal purposes.
NBN - EN ISO 3993 - LIQUEFIED PETROLEUM GAS AND LIGHT HYDROCARBONS - DETERMINATION OF DENSITY OR RELATIVE DENSITY - PRESSURE HYDROMETER METHOD (ISO 3993:1984) Organization: NBN
Date: 1995-11-01
Description: Alternative calibration procedures are described, but only the one using a certified hydrometer is suitable for the determination of density to be used in calculations of qualities for custody transfer or fiscal purposes.
NBN - EN ISO 3993 - GAZ DE PÉTROLE LIQUÉFIÉS ET HYDROCARBURES LÉGERS - DÉTERMINATION DE LA MASSE VOLUMIQUE OU DE LA DENSITÉ RELATIVE - MÉTHODE DE L'ARÉOMÈTRE SOUS PRESSION (ISO 3993:1984) Organization: NBN
Date: 1995-11-01
Description: Alternative calibration procedures are described, but only the one using a certified hydrometer is suitable for the determination of density to be used in calculations of qualities for custody transfer or fiscal purposes.

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