ISO 4266-4:2002
Petroleum and liquid petroleum products — Measurement of level and temperature in storage tanks by automatic methods — Part 4: Measurement of temperature in atmospheric tanks
ISO 4266-4 gives guidance on the selection, accuracy, installation, commissioning, calibration and verification of automatic tank thermometers (ATTs) in fiscal/custody transfer applications in which the ATT is used for measuring the temperature of petroleum and liquid petroleum products having a Reid vapour pressure less than 100 kPa, stored in atmospheric storage tanks.
ISO 4266-4 is not applicable to the measurement of temperature in caverns or in refrigerated storage tanks.
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TitlePage - Petroleum and liquid petroleum products— Measurement of level and temperature in sto...
TableofContent - Contents Page
Foreword - Foreword
Scope - 1 Scope
NormativeReference - 2 Normative references
Clause1 - 4 Precautions
Subclause2 - 4.1 Safety precautions
Subclause2 - 4.2 Equipment precautions
UntitledSubclause3 - 4.2.1 All of the ATT equipment should be capable of withstanding the pres...
UntitledSubclause3 - 4.2.2 ATTs should be certified for use in the hazardous-area classificati...
UntitledSubclause3 - 4.2.3 Measures should be taken to ensure that all exposed metal parts of ...
UntitledSubclause3 - 4.2.4 All parts of the ATT in contact with the product or its vapour shou...
UntitledSubclause3 - 4.2.5 All ATT equipment should be maintained in safe operating condition...
UntitledSubclause3 - 4.2.6 The temperature elements should be located so that the temperature ...
Subclause2 - 4.3 General precautions
UntitledSubclause3 - 4.3.1 The general precautions given in
UntitledSubclause3 - 4.3.2 Tank levels should be measured at the same time as the tank tempera...
UntitledSubclause3 - 4.3.3 Temperatures measured for bulk transfer should be recorded when the...
UntitledSubclause3 - 4.3.4 The same general procedures should be used to measure a tank temper...
UntitledSubclause3 - 4.3.5 ATTs should provide security to prevent unauthorized adjustment or ...
UntitledSubclause3 - 4.3.6 The design and installation of ATTs may be subject to the approval ...
Clause1 - 5 Accuracy
Subclause2 - 5.1 General
Subclause2 - 5.2 Intrinsic error of ATTs
Subclause2 - 5.3 Calibration prior to installation
Subclause3 - 5.3.1 General
Subclause3 - 5.3.2 ATT calibrated as a system
Subclause3 - 5.3.3 ATT calibrated by components
Subclause3 - 5.3.4 Multiple-point ATTs
Subclause3 - 5.3.5 Variable-length ATTs
Subclause3 - 5.3.6 Uncertainty of the reference
Subclause2 - 5.4 Error caused by installation and operating conditions
Subclause2 - 5.5 Overall accuracy
Subclause3 - 5.5.1 General
Subclause3 - 5.5.2 Use of ATT for fiscal/custody transfer purposes
Clause1 - 6 Selection of ATTs
Subclause2 - 6.1 General
Subclause2 - 6.2 ATTs for fiscal/custody transfer purposes
Clause1 - 7 Description of ATT equipment
Subclause2 - 7.1 Introduction
Subclause2 - 7.2 Electrical temperature elements
Subclause3 - 7.2.1 Resistance temperature detectors
Subclause3 - 7.2.2 Other temperature elements
Clause1 - 8 Installation of ATTs
Subclause2 - 8.1 General
Subclause2 - 8.2 Single-point (spot) temperature elements
Subclause2 - 8.3 Averaging temperature elements
Subclause3 - 8.3.1 General
Subclause3 - 8.3.2 Upper, middle and lower temperature elements
Subclause3 - 8.3.3 Multiple-point temperature elements
Subclause3 - 8.3.4 Variable-length RTD temperature elements
Subclause3 - 8.3.5 Mid-level temperature element
Subclause3 - 8.3.6 Moveable spot temperature element
Subclause3 - 8.3.7 Other methods
Subclause2 - 8.4 Thermowells for electronic temperature elements
Clause1 - 9 Calibration and field verification of ATTs
Subclause2 - 9.1 Introduction
Subclause2 - 9.2 Calibration of single-point, or mid-level temperature element ATTs for fiscal...
Subclause3 - 9.2.1 Calibration prior to installation
Subclause3 - 9.2.2 Initial field verification
Subclause4 - 9.2.2.1 Verification by components
Subclause5 - 9.2.2.1.1 Temperature element
Subclause5 - 9.2.2.1.2 Temperature transmitter
Subclause4 - 9.2.2.2 Verification as a system
Subclause2 - 9.3 Calibration of upper, middle and lower or multiple-point ATTs for fiscal/cust...
Subclause3 - 9.3.1 Calibration prior to installation
Subclause3 - 9.3.2 Initial field verification
Subclause4 - 9.3.2.1 Verification by components
Subclause5 - 9.3.2.1.1 Temperature element
Subclause5 - 9.3.2.1.2 Temperature transmitter
Subclause4 - 9.3.2.2 Verification as a system
Subclause2 - 9.4 Calibration of variable-length ATTs for fiscal/custody transfer purposes
Subclause3 - 9.4.1 Calibration prior to installation
Subclause3 - 9.4.2 Initial field verification
Subclause2 - 9.5 Subsequent verification of ATTs
Subclause3 - 9.5.1 General
Subclause3 - 9.5.2 Frequency of subsequent verification
Subclause3 - 9.5.3 Record keeping
Clause1 - 10 Data communication and receiving
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TitlePage - Petroleum and liquid petroleum products— Measurement of level and temperature in sto...
TableofContent - Contents Page
Foreword - Foreword
Scope - 1 Scope
NormativeReference - 2 Normative references
Clause1 - 4 Precautions
Subclause2 - 4.1 Safety precautions
Subclause2 - 4.2 Equipment precautions
UntitledSubclause3 - 4.2.1 All of the ATT equipment should be capable of withstanding the pres...
UntitledSubclause3 - 4.2.2 ATTs should be certified for use in the hazardous-area classificati...
UntitledSubclause3 - 4.2.3 Measures should be taken to ensure that all exposed metal parts of ...
UntitledSubclause3 - 4.2.4 All parts of the ATT in contact with the product or its vapour shou...
UntitledSubclause3 - 4.2.5 All ATT equipment should be maintained in safe operating condition...
UntitledSubclause3 - 4.2.6 The temperature elements should be located so that the temperature ...
Subclause2 - 4.3 General precautions
UntitledSubclause3 - 4.3.1 The general precautions given in
UntitledSubclause3 - 4.3.2 Tank levels should be measured at the same time as the tank tempera...
UntitledSubclause3 - 4.3.3 Temperatures measured for bulk transfer should be recorded when the...
UntitledSubclause3 - 4.3.4 The same general procedures should be used to measure a tank temper...
UntitledSubclause3 - 4.3.5 ATTs should provide security to prevent unauthorized adjustment or ...
UntitledSubclause3 - 4.3.6 The design and installation of ATTs may be subject to the approval ...
Clause1 - 5 Accuracy
Subclause2 - 5.1 General
Subclause2 - 5.2 Intrinsic error of ATTs
Subclause2 - 5.3 Calibration prior to installation
Subclause3 - 5.3.1 General
Subclause3 - 5.3.2 ATT calibrated as a system
Subclause3 - 5.3.3 ATT calibrated by components
Subclause3 - 5.3.4 Multiple-point ATTs
Subclause3 - 5.3.5 Variable-length ATTs
Subclause3 - 5.3.6 Uncertainty of the reference
Subclause2 - 5.4 Error caused by installation and operating conditions
Subclause2 - 5.5 Overall accuracy
Subclause3 - 5.5.1 General
Subclause3 - 5.5.2 Use of ATT for fiscal/custody transfer purposes
Clause1 - 6 Selection of ATTs
Subclause2 - 6.1 General
Subclause2 - 6.2 ATTs for fiscal/custody transfer purposes
Clause1 - 7 Description of ATT equipment
Subclause2 - 7.1 Introduction
Subclause2 - 7.2 Electrical temperature elements
Subclause3 - 7.2.1 Resistance temperature detectors
Subclause3 - 7.2.2 Other temperature elements
Clause1 - 8 Installation of ATTs
Subclause2 - 8.1 General
Subclause2 - 8.2 Single-point (spot) temperature elements
Subclause2 - 8.3 Averaging temperature elements
Subclause3 - 8.3.1 General
Subclause3 - 8.3.2 Upper, middle and lower temperature elements
Subclause3 - 8.3.3 Multiple-point temperature elements
Subclause3 - 8.3.4 Variable-length RTD temperature elements
Subclause3 - 8.3.5 Mid-level temperature element
Subclause3 - 8.3.6 Moveable spot temperature element
Subclause3 - 8.3.7 Other methods
Subclause2 - 8.4 Thermowells for electronic temperature elements
Clause1 - 9 Calibration and field verification of ATTs
Subclause2 - 9.1 Introduction
Subclause2 - 9.2 Calibration of single-point, or mid-level temperature element ATTs for fiscal...
Subclause3 - 9.2.1 Calibration prior to installation
Subclause3 - 9.2.2 Initial field verification
Subclause4 - 9.2.2.1 Verification by components
Subclause5 - 9.2.2.1.1 Temperature element
Subclause5 - 9.2.2.1.2 Temperature transmitter
Subclause4 - 9.2.2.2 Verification as a system
Subclause2 - 9.3 Calibration of upper, middle and lower or multiple-point ATTs for fiscal/cust...
Subclause3 - 9.3.1 Calibration prior to installation
Subclause3 - 9.3.2 Initial field verification
Subclause4 - 9.3.2.1 Verification by components
Subclause5 - 9.3.2.1.1 Temperature element
Subclause5 - 9.3.2.1.2 Temperature transmitter
Subclause4 - 9.3.2.2 Verification as a system
Subclause2 - 9.4 Calibration of variable-length ATTs for fiscal/custody transfer purposes
Subclause3 - 9.4.1 Calibration prior to installation
Subclause3 - 9.4.2 Initial field verification
Subclause2 - 9.5 Subsequent verification of ATTs
Subclause3 - 9.5.1 General
Subclause3 - 9.5.2 Frequency of subsequent verification
Subclause3 - 9.5.3 Record keeping
Clause1 - 10 Data communication and receiving