ASTM D1250 standard guide for use of the petroleum measurement tables
1. Scope
1.1 The API MPMS Chapter 11.1-2004/Adjunct to IP 200/04/Adjunct to ASTM D1250-04 (ADJD1250CD) for temperature and pressure volume correction factors for generalized crude oils, refined products, and lubricating oils, provides the algorithm and implementation procedure for the correction of temperature and pressure effects on density and volume of liquid hydrocarbons. Natural gas liquids (NGLs) and liquefied petroleum gases (LPGs) are excluded from consideration. The combination of density and volume correction factors for both temperature and pressure is collectively referred to in the standard/adjunct(s) as a Volume Correction Factor (VCF). The temperature portion of this correction is termed the Correction for the effect of Temperature on Liquid (CTL). The pressure portion is termed the Correction for the effect of Pressure on Liquid (CPL).
1.2 Including the pressure correction in API MPMS Chapter 11.1-2004/Adjunct to IP 200/04/Adjunct to ASTM D1250-04 (ADJD1250CD) represents an important change from the "temperature only" correction factors given in the 1980 Petroleum Measurement Tables. However, if the pressure is one atmosphere (the standard pressure) then there is no pressure correction and the standard/adjunct(s) will give VCF values consistent with the 1980 Petroleum Measurement Tables.
1.3 API MPMS Chapter 11.1-2004/Adjunct to IP 200/04/Adjunct to ASTM D1250-04 (ADJD1250CD) covers general procedures for the conversion of input data to a form that is consistent with the computation procedures used to generate VCF values. Two sets of procedures are included for computing volume correction factor: one set for data expressed in customary units (temperature in °F, pressure in psig); the other for the metric system of units (temperature in °C, pressure in kPa or bar). In contrast to the 1980 Petroleum Measurement Tables, the metric procedures require the procedure for customary units be used first to compute density at 60°F. This value is then further corrected to give the metric output. The metric procedures now incorporate the base temperature of 20°C in addition to 15°C.
1.4 The procedures recognize three distinct commodity groups: crude oil, refined products, and lubricating oils. A procedure is also provided for determining volume correction for special applications where the generalized commodity groups' parameters may not adequately represent the thermal expansion properties of the liquid and a precise thermal expansion coefficient has been determined by experiment.
2. Referenced Documents
2.1 API Standards:
API Manual of Petroleum Measurement Standards (MPMS): Chapter 11.1-2004 Temperature and Pressure Volume Correction Factors for Generalized Crude Oils, Refined Products, and Lubricating Oils
Chapter 11.2.1 Compressibility Factors for Hydrocarbons: 0 - 90° API Gravity Range
Chapter 11.2.1M Compressibility Factors for Hydrocarbons: 638-1074 Kilograms per Cubic Meter Range
2.2 ISO Standards:
ISO 91-1:1992 Petroleum measurement tables - Part 1: Tables based on reference temperatures of 15°C and 60°F
ISO 91-2:1991 Petroleum measurement tables - Part 2: Tables based on a reference temperature of 20°C
2.3 ASTM Adjuncts:
Adjunct to ASTM D1250: ADJD1250CD - Temperature and Pressure Volume Correction Factors for Generalized Crude Oils, Refined Products, and Lubricating Oils
3. Sponsorship
3.1 The revision of the ASTM/API/IP set of implementation procedures is the result of close cooperation between ASTM International, the American Petroleum Institute (API), and the Energy Institute. To meet the objective of worldwide standardized measurement practices, it is expected to result in the acceptance of the revised tables by the International Organization for Standardization (ISO), and specifically ISO/TC 28/SC 3, as revisions to International Standards ISO 91-1 and ISO 91-2. API MPMS Chapter 11.1-2004/Adjunct to IP 200/04/Adjunct to ASTM D1250-04 (ADJD1250CD) applies to all crude oils, refined products, and lubricants previously covered by Tables 5, 6, 23, 24, 53, 54, 59, and 60. The API designation for the complete set of implementation procedures is the Manual of Petroleum Measurement Standards (MPMS) Chapter 11 Section 1. The IP designation for the complete set of implementation procedures is the Adjunct to IP 200.
