astm 1250 стандартное руководство по применению таблиц измерения параметров нефти и нефтепродуктов

Astm 1250 стандартное руководство по применению таблиц измерения параметров нефти и нефтепродуктов

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If you are an ASTM Compass Subscriber and this document is part of your subscription, you can access it for free at ASTM Compass

ASTM D1250-19

Historical Standard: Стандартное руководство по использованию совместного Вспомогательного стандарта API и ASTM на поправочные коэффициенты объема на температуру и давление для обобщенных типов сырой нефти, продуктов нефтепереработки и смазочных масел: Глава 11.1 API MPMS

5.2 Note that only the precision levels of the defining values shown in Table 1 are correct. The other values showing converted units have been rounded to the significant digits shown; as rounded values, they may numerically fall just outside of the actual limits established by the defining values.

5.3 Table 2 provides a cross-reference between the historical table designations and the corresponding section in the Adjunct for VCF. Note that procedure paragraphs 11.1.6.3 (U.S. customary units) and 11.1.7.3 (metric units) provide methods for correcting on-line density measurements from live conditions to base conditions and then to compute CTPL factors for continuous volume corrections to base conditions.

5.4 When a glass hydrometer is used to measure the density of a liquid, special corrections must be made to account for the thermal expansion of the glass when the temperature is different from that at which the hydrometer was calibrated. The 1980 CTL Tables had generalized equations to correct glass hydrometer readings, and these corrections were part of the printed odd-numbered tables. However, detailed procedures to correct a glass hydrometer reading are beyond the scope of the Adjunct for VCF. The user should refer to the appropriate sections of API MPMS Chapter 9 or other appropriate density/hydrometer standards for guidance.

5.5 The set of correlations given in the Adjunct for VCF is intended for use with petroleum fluids comprising either crude oils, refined products, or lubricating oils that are single-phase liquids under normal operating conditions. The liquid classifications listed here are typical terms used in the industry, but local nomenclature may vary. The list is illustrative and is not meant to be all-inclusive.

5.6 Crude Oils— A crude oil is considered to conform to the commodity group Generalized Crude Oils if its density falls in the range between approximately –10°API to 100°API. Crude oils that have been stabilized for transportation or storage purposes and whose API gravities lie within that range are considered to be part of the Crude Oil group. Also, aviation Jet B (JP-4) is best represented by the Crude Oil correlation.

5.7 Refined Products— A refined product is considered to conform to the commodity group of Generalized Refined Products if the fluid falls within one of the refined product groups. Note the product descriptors are generalizations. The commercial specification ranges of some products may place their densities partly within an adjacent class (for example, a low-density diesel may lie in the jet fuel class). In such cases, the product should be allocated to the class appropriate to its density, not its descriptor. The groups are defined as follows:

5.7.1 Gasoline— Motor gasoline and unfinished gasoline blending stock with a base density range between approximately 50°API and 85°API. This group includes substances with the commercial identification of: premium gasoline, unleaded gasoline, motor spirit, clear gasoline, low-lead gas, motor gasoline, catalyst gas, alkylate, catalytic cracked gasoline, naphtha, reformulated gasoline, and aviation gasoline.

5.7.2 Jet Fuels— Jet fuels, kerosene, and Stoddard solvents with a base density range between approximately 37°API and 50°API. This group includes substances with the commercial identification of: aviation kerosene K1 and K2, aviation Jet A and A-1, kerosene, Stoddard solvent, JP-5, and JP-8.

5.7.3 Fuel Oils— Diesel oils, heating oils, and fuel oils with a base density range between approximately –10°API and 37°API. This group includes substances with the commercial identification of: No. 6 fuel oil, fuel oil PA, low-sulfur fuel oil, LT (low temperature) fuel oil, fuel oil, fuel oils LLS (light low sulfur), No. 2 furnace oil, furnace oil, auto diesel, gas oil, No. 2 burner fuel, diesel fuel, heating oil, and premium diesel.

5.8 Lubricating Oils— A lubricating oil is considered to conform to the commodity group Generalized Lubricating Oils if it is a base stock derived from crude oil fractions by distillation or asphalt precipitation. For the purpose of the Adjunct for VCF, lubricating oils have initial boiling points greater than 700 °F (370 °C) and densities in the range between approximately –10°API to 45°API.

5.9 Special Applications— Liquids that are assigned the special applications category are generally relatively pure products or homogeneous mixtures with stable (unchanging) chemical composition that are derived from petroleum (or are petroleum-based with minor proportions of other constituents) and have been tested to establish a specific thermal expansion factor for the particular fluid. These tables should be considered for use when:

5.9.1 The generalized commodity groups’ parameters are suspected of not adequately representing the thermal expansion properties of the liquid.

5.9.2 A precise thermal expansion coefficient can be determined by experiment. A minimum of ten temperature/density data points is recommended to use this method. See 11.1.5.2 of the Adjunct for VCF for the procedure to calculate the thermal expansion coefficient from measured density data.

5.9.3 Buyer and seller agree that, for their purpose, a greater degree of equity can be obtained using factors specifically measured for the liquid involved in the transaction.

5.10 Refer to paragraphs 11.1.2.4 and 11.1.2.5 in the Adjunct for VCF for a complete description of the suitability of the implementation procedures for specific hydrocarbon liquids.

Significance and Use

5.2 Note that only the precision levels of the defining values shown in Table 1 are correct. The other values showing converted units have been rounded to the significant digits shown; as rounded values, they may numerically fall just outside of the actual limits established by the defining values.

5.3 Table 2 provides a cross-reference between the historical table designations and the corresponding section in the Adjunct for VCF. Note that procedure paragraphs 11.1.6.3 (U.S. customary units) and 11.1.7.3 (metric units) provide methods for correcting on-line density measurements from live conditions to base conditions and then to compute CTPL factors for continuous volume corrections to base conditions.

5.4 When a glass hydrometer is used to measure the density of a liquid, special corrections must be made to account for the thermal expansion of the glass when the temperature is different from that at which the hydrometer was calibrated. The 1980 CTL Tables had generalized equations to correct glass hydrometer readings, and these corrections were part of the printed odd-numbered tables. However, detailed procedures to correct a glass hydrometer reading are beyond the scope of the Adjunct for VCF. The user should refer to the appropriate sections of API MPMS Chapter 9 or other appropriate density/hydrometer standards for guidance.

5.5 The set of correlations given in the Adjunct for VCF is intended for use with petroleum fluids comprising either crude oils, refined products, or lubricating oils that are single-phase liquids under normal operating conditions. The liquid classifications listed here are typical terms used in the industry, but local nomenclature may vary. The list is illustrative and is not meant to be all-inclusive.

5.6 Crude Oils— A crude oil is considered to conform to the commodity group Generalized Crude Oils if its density falls in the range between approximately –10°API to 100°API. Crude oils that have been stabilized for transportation or storage purposes and whose API gravities lie within that range are considered to be part of the Crude Oil group. Also, aviation Jet B (JP-4) is best represented by the Crude Oil correlation.

5.7 Refined Products— A refined product is considered to conform to the commodity group of Generalized Refined Products if the fluid falls within one of the refined product groups. Note the product descriptors are generalizations. The commercial specification ranges of some products may place their densities partly within an adjacent class (for example, a low-density diesel may lie in the jet fuel class). In such cases, the product should be allocated to the class appropriate to its density, not its descriptor. The groups are defined as follows:

5.7.1 Gasoline— Motor gasoline and unfinished gasoline blending stock with a base density range between approximately 50°API and 85°API. This group includes substances with the commercial identification of: premium gasoline, unleaded gasoline, motor spirit, clear gasoline, low-lead gas, motor gasoline, catalyst gas, alkylate, catalytic cracked gasoline, naphtha, reformulated gasoline, and aviation gasoline.

5.7.2 Jet Fuels— Jet fuels, kerosene, and Stoddard solvents with a base density range between approximately 37°API and 50°API. This group includes substances with the commercial identification of: aviation kerosene K1 and K2, aviation Jet A and A-1, kerosene, Stoddard solvent, JP-5, and JP-8.

5.7.3 Fuel Oils— Diesel oils, heating oils, and fuel oils with a base density range between approximately –10°API and 37°API. This group includes substances with the commercial identification of: No. 6 fuel oil, fuel oil PA, low-sulfur fuel oil, LT (low temperature) fuel oil, fuel oil, fuel oils LLS (light low sulfur), No. 2 furnace oil, furnace oil, auto diesel, gas oil, No. 2 burner fuel, diesel fuel, heating oil, and premium diesel.

5.8 Lubricating Oils— A lubricating oil is considered to conform to the commodity group Generalized Lubricating Oils if it is a base stock derived from crude oil fractions by distillation or asphalt precipitation. For the purpose of the Adjunct for VCF, lubricating oils have initial boiling points greater than 700 °F (370 °C) and densities in the range between approximately –10°API to 45°API.

5.9 Special Applications— Liquids that are assigned the special applications category are generally relatively pure products or homogeneous mixtures with stable (unchanging) chemical composition that are derived from petroleum (or are petroleum-based with minor proportions of other constituents) and have been tested to establish a specific thermal expansion factor for the particular fluid. These tables should be considered for use when:

5.9.1 The generalized commodity groups’ parameters are suspected of not adequately representing the thermal expansion properties of the liquid.

5.9.2 A precise thermal expansion coefficient can be determined by experiment. A minimum of ten temperature/density data points is recommended to use this method. See 11.1.5.2 of the Adjunct for VCF for the procedure to calculate the thermal expansion coefficient from measured density data.

5.9.3 Buyer and seller agree that, for their purpose, a greater degree of equity can be obtained using factors specifically measured for the liquid involved in the transaction.

5.10 Refer to paragraphs 11.1.2.4 and 11.1.2.5 in the Adjunct for VCF for a complete description of the suitability of the implementation procedures for specific hydrocarbon liquids.

1. Область применения

1.1 Настоящее руководство содержит информацию, относящуюся к алгоритму и процедуре реализации, но не содержит полный набор алгоритмов. Алгоритмы, инструкции, процедуры и примеры находятся в соответствующих дополнительных вспомогательных стандартах. Вспомогательный стандарт на поправочные коэффициенты объема (VCF) на температуру и давление для обобщенных типов сырой нефти, нефтепродуктов и смазочных масел определяет алгоритм и процедуру реализации для внесения поправок на влияние температуры и давления на плотность и объем жидких углеводородов. В настоящем стандарте газоконденсатные жидкости (NGL) и сжиженные углеводородные газы (LPG) исключены из рассмотрения, но они описаны в API MPMS, Глава 11.2.4/GPA 8217, «Температурная поправка для NGL и LPG». Поскольку настоящий Вспомогательный стандарт на VCF будет использоваться для многих видов применения, могутиспользоваться выходные параметры CTL, F, CPL и CTPL в соответствии с указаниями в других стандартах.

1.2 Включение поправки на давление во Вспомогательный стандарт на VCF представляет собой важное изменение по отношению к поправочным коэффициентам «только на температуру», приведенным в Таблицах измерений нефти 1980 г. Однако если давление составляет одну атмосферу (стандартное давление), то поправка на давление не нужна, и стандарт/вспомогательный(-ые) стандарт(-ы) будут давать значения CTL, согласующиеся с Таблицам измерений нефти 1980 г.

1.3 Вспомогательный стандарт на VCF охватывает общие процедуры преобразования входных данных для получения значений CTL, F, CPL и CTPL при установленных p пользователем температуре и давлении (T, P). Включены два b b набора процедур для расчета поправочного коэффициента объема: один набор для данных, выраженных в единицах традиционной американской системы мер и весов (температура в °F, давление в фунтах/дюйм 2 изб.), другой набор для метрической системы единиц измерения (температура в °С, давление в кПа или барах).

ПРИМЕЧАНИЕ 1 — В противоположность Таблицам измерений нефти 1980 г., для метрических процедур требуется сначала использовать процедуру с единицами традиционной американской системы мер и весов для вычисления плотности при 60 °F. Данное значение затем корректируется для получения результата в метрических единицах измерения. Процедуры на основе метрических единиц измерения теперь включают в себя базовую температуру 20 °С в дополнение к 15 °С.

1.4 Во Вспомогательном стандарте на VCF различают процедуры для трех отдельных товарных групп: сырой нефти, нефтепродуктов и смазочных масел. Также приводится процедура для определения поправки объема для специальных видов применения, когда параметры обобщенных товарных групп могут ненадлежащим образом представлять характеристики теплового расширения жидкости, и коэффициент точного теплового расширения определен экспериментальным путем. Процедуры определения поправочных коэффициентов объема (VCF) для денатурированного этанола приведены в API MPMS, Глава 11.3.3, «Прочие свойства углеводородов — Плотность и поправочные коэффициенты объема для денатурированного этанола», 3-е издание. Процедуры определения поправочных коэффициентов объема (VCF) для смесей бензина и денатурированного этанола приведены в API MPMS, Глава 11.3.4, «Прочие свойства углеводородов — Плотности и поправочные коэффициенты объема для смесей бензина и денатурированного этанола», 1-е издание.

1.5 Значения, указанные как в единицах СИ, так и в системе дюйм-фунт, должны рассматриваться отдельно в качестве стандартных. Значения, указанные в каждой системе измерений, могут не быть точными эквивалентами; таким образом, каждая система должна использоваться независимо от другой, и значения двух систем измерения не должны комбинироваться.

1.6 Настоящий международный стандарт разработан в соответствии с международно признанными принципами стандартизации, установленными в Решении о принципах разработки международных стандартов, руководств ирекомендаций Комитета по техническим барьерам в торговле (TBT) Всемирной торговой организации.

2. Ссылочные документы

Chapter 11.1–2004 Temperature and Pressure Volume Correction Factors for Generalized Crude Oils, Refined Products, and Lubricating Oils (including Addendum 1-2007) Available on CD-ROM from API. Order Product Number H11013.

Chapter 11.5 Density/Weight/Volume Intraconversion Available on CD-ROM from API. Order Product Number H1105CD.

Источник

Astm 1250 стандартное руководство по применению таблиц измерения параметров нефти и нефтепродуктов

Products and Services / Standards & Publications / Standards Products

If you are an ASTM Compass Subscriber and this document is part of your subscription, you can access it for free at ASTM Compass

ASTM D1250-08(2013)

Historical Standard: Стандартное руководство по расчетным таблицам по нефти инефтепродуктам

4.2 Note that only the precision levels of the defining values shown in Table 1 are correct. The other values showing converted units have been rounded to the significant digits shown; as rounded values, they may numerically fall just outside of the actual limits established by the defining values.

4.3 Table 2 provides a cross-reference between the historical table designations and the corresponding section in API MPMS Chapter 11.1–2004/Adjunct to IP 200/04/Adjunct to ASTM D1250–04 (ADJD1250CD). Note that procedure paragraphs 11.1.6.3 (U.S. customary units) and 11.1.7.3 (metric units) provide methods for correcting on-line density measurements from live conditions to base conditions and then to compute CTPL factors for continuous volume corrections to base conditions.

4.4 When a glass hydrometer is used to measure the density of a liquid, special corrections must be made to account for the thermal expansion of the glass when the temperature is different from that at which the hydrometer was calibrated. The 1980 CTL Tables had generalized equations to correct glass hydrometer readings, and these corrections were part of the printed odd-numbered tables. However, detailed procedures to correct a glass hydrometer reading are beyond the scope of API MPMS Chapter 11.1–2004/Adjunct to IP 200/04/Adjunct to ASTM D1250–04 (ADJD1250CD). The user should refer to the appropriate sections of API MPMS Chapter 9 or other appropriate density/hydrometer standards for guidance.

4.5 The set of correlations given in API MPMS Chapter 11.1–2004/Adjunct to IP 200/04/Adjunct to ASTM D1250–04 (ADJD1250CD) is intended for use with petroleum fluids comprising either crude oils, refined products, or lubricating oils that are single-phase liquids under normal operating conditions. The liquid classifications listed here are typical terms used in the industry, but local nomenclature may vary. The list is illustrative and is not meant to be all-inclusive.

4.6 Crude Oils—A crude oil is considered to conform to the commodity group Generalized Crude Oils if its density falls in the range between approximately –10°API to 100°API. Crude oils that have been stabilized for transportation or storage purposes and whose API gravities lie within that range are considered to be part of the Crude Oil group. Also, aviation jet B (JP-4) is best represented by the Crude Oil correlation.

4.7 Refined Products—A refined product is considered to conform to the commodity group of Generalized Refined Products if the fluid falls within one of the refined product groups. Note the product descriptors are generalizations. The commercial specification ranges of some products may place their densities partly within an adjacent class (for example, a low density diesel may lie in the jet fuel class). In such cases, the product should be allocated to the class appropriate to its density, not its descriptor. The groups are defined as follows:

4.7.1 Gasoline—Motor gasoline and unfinished gasoline blending stock with a base density range between approximately 50°API and 85°API. This group includes substances with the commercial identification of: premium gasoline, unleaded gasoline, motor spirit, clear gasoline, low lead gas, motor gasoline, catalyst gas, alkylate, catalytic cracked gasoline, naphtha, reformulated gasoline, and aviation gasoline.

4.7.2 Jet Fuels—Jet fuels, kerosene, and Stoddard solvents with a base density range between approximately 37°API and 50°API. This group includes substances with the commercial identification of: aviation kerosene K1 and K2, aviation jet A and A-1, kerosene, Stoddard solvent, JP-5 and JP-8.

4.7.3 Fuel Oils—Diesel oils, heating oils, and fuel oils with a base density range between approximately –10°API and 37°API. This group includes substances with the commercial identification of: No. 6 fuel oil, fuel oil PA, low sulfur fuel oil, LT (low temperature) fuel oil, fuel oil, fuel oils LLS (light low sulfur), No. 2 furnace oil, furnace oil, auto diesel, gas oil, No. 2 burner fuel, diesel fuel, heating oil, and premium diesel.

4.8 Lubricating Oils—A lubricating oil is considered to conform to the commodity group Generalized Lubricating Oils if it is a base stock derived from crude oil fractions by distillation or asphalt precipitation. For the purpose of API MPMS Chapter 11.1–2004/Adjunct to IP 200/04/Adjunct to ASTM D1250–04 (ADJD1250CD), lubricating oils have initial boiling points greater than 700°F (370°C) and densities in the range between approximately –10°API to 45°API.

4.9 Special Applications—Liquids that are assigned the special applications category are generally relatively pure products or homogeneous mixtures with stable (unchanging) chemical composition that are derived from petroleum (or are petroleum-based with minor proportions of other constituents) and have been tested to establish a specific thermal expansion factor for the particular fluid. These tables should be considered for use when:

4.9.1 The generalized commodity groups’ parameters are suspected of not adequately representing the thermal expansion properties of the liquid.

4.9.2 A precise thermal expansion coefficient can be determined by experiment. A minimum of 10 temperature/density data points is recommended to use this method. See 11.1.5.2 of API MPMS Chapter 11.1–2004/Adjunct to IP 200/04/Adjunct to ASTM D1250–04 (ADJD1250CD) for the procedure to calculate the thermal expansion coefficient from measured density data.

4.9.3 Buyer and seller agree that, for their purpose, a greater degree of equity can be obtained using factors specifically measured for the liquid involved in the transaction.

4.9.4 Specific Examples:

4.10 Refer to paragraphs 11.1.2.4 and 11.1.2.5 in API MPMS Chapter 11.1–2004/Adjunct to IP 200/04/Adjunct to ASTM D1250–04 (ADJD1250CD) for a complete description of the suitability of the implementation procedures for specific hydrocarbon liquids.

Significance and Use

4.2 Note that only the precision levels of the defining values shown in Table 1 are correct. The other values showing converted units have been rounded to the significant digits shown; as rounded values, they may numerically fall just outside of the actual limits established by the defining values.

4.3 Table 2 provides a cross-reference between the historical table designations and the corresponding section in API MPMS Chapter 11.1–2004/Adjunct to IP 200/04/Adjunct to ASTM D1250–04 (ADJD1250CD). Note that procedure paragraphs 11.1.6.3 (U.S. customary units) and 11.1.7.3 (metric units) provide methods for correcting on-line density measurements from live conditions to base conditions and then to compute CTPL factors for continuous volume corrections to base conditions.

4.4 When a glass hydrometer is used to measure the density of a liquid, special corrections must be made to account for the thermal expansion of the glass when the temperature is different from that at which the hydrometer was calibrated. The 1980 CTL Tables had generalized equations to correct glass hydrometer readings, and these corrections were part of the printed odd-numbered tables. However, detailed procedures to correct a glass hydrometer reading are beyond the scope of API MPMS Chapter 11.1–2004/Adjunct to IP 200/04/Adjunct to ASTM D1250–04 (ADJD1250CD). The user should refer to the appropriate sections of API MPMS Chapter 9 or other appropriate density/hydrometer standards for guidance.

4.5 The set of correlations given in API MPMS Chapter 11.1–2004/Adjunct to IP 200/04/Adjunct to ASTM D1250–04 (ADJD1250CD) is intended for use with petroleum fluids comprising either crude oils, refined products, or lubricating oils that are single-phase liquids under normal operating conditions. The liquid classifications listed here are typical terms used in the industry, but local nomenclature may vary. The list is illustrative and is not meant to be all-inclusive.

4.6 Crude Oils—A crude oil is considered to conform to the commodity group Generalized Crude Oils if its density falls in the range between approximately –10°API to 100°API. Crude oils that have been stabilized for transportation or storage purposes and whose API gravities lie within that range are considered to be part of the Crude Oil group. Also, aviation jet B (JP-4) is best represented by the Crude Oil correlation.

4.7 Refined Products—A refined product is considered to conform to the commodity group of Generalized Refined Products if the fluid falls within one of the refined product groups. Note the product descriptors are generalizations. The commercial specification ranges of some products may place their densities partly within an adjacent class (for example, a low density diesel may lie in the jet fuel class). In such cases, the product should be allocated to the class appropriate to its density, not its descriptor. The groups are defined as follows:

4.7.1 Gasoline—Motor gasoline and unfinished gasoline blending stock with a base density range between approximately 50°API and 85°API. This group includes substances with the commercial identification of: premium gasoline, unleaded gasoline, motor spirit, clear gasoline, low lead gas, motor gasoline, catalyst gas, alkylate, catalytic cracked gasoline, naphtha, reformulated gasoline, and aviation gasoline.

4.7.2 Jet Fuels—Jet fuels, kerosene, and Stoddard solvents with a base density range between approximately 37°API and 50°API. This group includes substances with the commercial identification of: aviation kerosene K1 and K2, aviation jet A and A-1, kerosene, Stoddard solvent, JP-5 and JP-8.

4.7.3 Fuel Oils—Diesel oils, heating oils, and fuel oils with a base density range between approximately –10°API and 37°API. This group includes substances with the commercial identification of: No. 6 fuel oil, fuel oil PA, low sulfur fuel oil, LT (low temperature) fuel oil, fuel oil, fuel oils LLS (light low sulfur), No. 2 furnace oil, furnace oil, auto diesel, gas oil, No. 2 burner fuel, diesel fuel, heating oil, and premium diesel.

4.8 Lubricating Oils—A lubricating oil is considered to conform to the commodity group Generalized Lubricating Oils if it is a base stock derived from crude oil fractions by distillation or asphalt precipitation. For the purpose of API MPMS Chapter 11.1–2004/Adjunct to IP 200/04/Adjunct to ASTM D1250–04 (ADJD1250CD), lubricating oils have initial boiling points greater than 700°F (370°C) and densities in the range between approximately –10°API to 45°API.

4.9 Special Applications—Liquids that are assigned the special applications category are generally relatively pure products or homogeneous mixtures with stable (unchanging) chemical composition that are derived from petroleum (or are petroleum-based with minor proportions of other constituents) and have been tested to establish a specific thermal expansion factor for the particular fluid. These tables should be considered for use when:

4.9.1 The generalized commodity groups’ parameters are suspected of not adequately representing the thermal expansion properties of the liquid.

4.9.2 A precise thermal expansion coefficient can be determined by experiment. A minimum of 10 temperature/density data points is recommended to use this method. See 11.1.5.2 of API MPMS Chapter 11.1–2004/Adjunct to IP 200/04/Adjunct to ASTM D1250–04 (ADJD1250CD) for the procedure to calculate the thermal expansion coefficient from measured density data.

4.9.3 Buyer and seller agree that, for their purpose, a greater degree of equity can be obtained using factors specifically measured for the liquid involved in the transaction.

4.9.4 Specific Examples:

4.10 Refer to paragraphs 11.1.2.4 and 11.1.2.5 in API MPMS Chapter 11.1–2004/Adjunct to IP 200/04/Adjunct to ASTM D1250–04 (ADJD1250CD) for a complete description of the suitability of the implementation procedures for specific hydrocarbon liquids.

1. Область применения

1.1 API MPMS Глава 11.1-2004/ Дополнение к IP 200/Дополнение к ASTM D 1250-04 (ADJD1250CD) по объемным поправочным коэффициентам на давление и температуру для обобщенных сырых нефтей, очищенных нефтепродуктов и смазочных масел дает алгоритм и процедуру выполнения корректировки влияния температуры и давления на плотность и объем жидких углеводородов. Газоконденсаты (NGLs) и сжиженные нефтяные газы (LPGs) не рассматриваются. Комбинация поправочных коэффициентов для плотности и объема как на температуру, так и на давление совместно рассматривается в данном стандарте/дополнении(ях) как Поправка на Температуру и Давление Жидкости (CTPL). Температурная компонента этой поправки называется Поправка на Температуру Жидкости (CTL), также известная ранее как VCF (объемный поправочный коэффициент). Компонента давления называется Поправкой на Давление Жидкости (CPL). Так как данный стандарт будет использоваться при многих применениях, выходные параметры, указанные в этом стандарте/дополнении(ях) (CTL, Fp, CPL и CTPL) могут быть использованы как указано в других стандартах.

1.2 Включение поправки на давление в API MPMS Глава 11.1-2004/ Дополнение к IP 200/Дополнение к ASTM D 1250-04 (ADJD1250CD) представляет собой важное изменение по отношению к поправочным коэффициентам «только на температуру», представленным в Расчетных таблицах по нефти 1980 г. Однако, если давление равно одной атмосфере (стандартное давление), то поправка на давление не нужна, и стандарт/дополнение(я) будут давать значения CTL, не противоречащие Расчетным таблицам по нефти 1980 г.

1.3 API MPMS Глава 11.1-2004/ Дополнение к IP 200/Дополнение к ASTM D 1250-04 (ADJD1250CD) охватывает общие процедуры преобразования входных данных для получения значений CTL, Fp, CPL и CTPL, когда пользователь установил температуру и давление (Tb, Pb). Включены два набора процедур для расчета объемного поправочного коэффициента: один набор для данных, выраженных в обычных единицах (температура в F, избыт. давление в фунт/кв. дюйм); другой набор для метрической системы единиц (температура в С, давление в кПа или барах). В противоположность с Расчетными таблицами по нефти 1980 г. для метрических процедур требуется сначала использовать процедуру с традиционными единицами для вычисления плотности при 60F. Это значение затем корректируют, чтобы получить метрические единицы. Процедуры на основе метрических единиц теперь включают базовую температуру 20С в дополнение к 15С.

1.4 Процедуры различают три отдельных товарных группы: сырая нефть, очищенные нефтепродукты и смазочные масла. Предусмотрена также процедура для определения поправки на объем для специальных случаев, когда параметры обобщенных товарных групп могут не адекватно представлять характеристики теплового расширения жидкости, а коэффициент точного теплового расширения определен экспериментальным путем.

2. Ссылочные документы

Chapter 11.1–2004 Temperature and Pressure Volume Correction Factors for Generalized Crude Oils, Refined Products, and Lubricating Oils (including Addendum 1-2007) Available on CD-ROM from API. Order Product Number H11013.

Chapter 11.5 Density/Weight/Volume Intraconversion Available on CD-ROM from API. Order Product Number H1105CD.

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