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ASTM D6377-16
Standard Test Method for Determination of Vapor Pressure of Crude Oil: VPCRx ;(Expansion Method)
7 стр.
Заменен
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96.72 $ (включая НДС 20%)
Разработчик:
Зарубежные/ASTM
ICS:
75.040 Crude petroleum / Сырая нефть
Сборник (ASTM):
05.03 Petroleum Products, Liquid Fuels, and Lubricants (III): D6138–D6971 / Нефтепродукты, жидкое топливо и смазочные материалы (III): D6138–D6971
Тематика:
Petroleum
Описание
Значение и использование

5.1 Vapor pressure of crude oil at various V/Ls is an important physical property for shipping and storage.

Note 2: A vapor-liquid ratio of 0.02:1 (X = 0.02) mimics closely the situation of an oil tanker.

5.2 Vapor pressure of crude oil is important to crude oil producers and refiners for general handling and initial refinery treatment.

5.3 The vapor pressure determined by this test method at a vapor-liquid ratio of 4:1 (VPCR4) of crude oil at 37.8 °C can be related to the vapor pressure value determined on the same material when tested by Test Method D323 (see Appendix X1).

5.4 Air saturation of crude oil shall not be done to avoid potential vapor loss. However air saturation of the chilled verification fluid is mandatory (see 7.2 and Section 11).

5.5 This test method can also be applied in online applications.

Область применения

1.1 This test method covers the use of automated vapor pressure instruments to determine the vapor pressure exerted in vacuum of crude oils. This test method is suitable for testing samples that exert a vapor pressure between 25 kPa and 180 kPa at 37.8 °C at vapor-liquid ratios from 4:1 to 0.02:1 (X = 4 to 0.02).

Note 1: This test method is suitable for the determination of the vapor pressure of crude oils at temperatures from 0 °C to 100 °C and pressures up to 500 kPa, but the precision and bias statements (see Section 14) may not be applicable.

1.2 This test method also allows the determination of vapor pressure for crude oil samples having pour points above 15 °C provided the proper sample handling, transfer, and analysis procedures are followed.

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific warning statements, see 7.2.1 – 7.3.2.

Ключевые слова:
crude oil; expansion method; Reid vapor pressure; vapor pressure;