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BS ISO 4266-3:2002 Petroleum and liquid petroleum products. Measurement of level and temperature in storage tanks by automatic methods - Measurement of level in pressurized storage tanks (non-refrigerated), 2002
- 30077847.pdf [Go to Page]
- TitlePage - Petroleum and liquid petroleum products�— Measurement of level and temperature in sto...
- TableofContent - Contents Page
- Foreword - Foreword [Go to Page]
- Scope - 1��� Scope
- NormativeReference - 2��� Normative reference
- Clause1 - 4��� Precautions [Go to Page]
- Subclause2 - 4.1��� Safety precautions
- Subclause2 - 4.2��� Equipment precautions [Go to Page]
- UntitledSubclause3 - 4.2.1��� All of the ALG equipment should be capable of withstanding the pres...
- UntitledSubclause3 - 4.2.2��� ALGs 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 ALG equipment should be maintained in safe operating condition ...
- Subclause2 - 4.3��� General precautions [Go to Page]
- UntitledSubclause3 - 4.3.1��� The general precautions given in
- UntitledSubclause3 - 4.3.2��� The measurement of tank vapour pressure and temperature, liquid tem...
- UntitledSubclause3 - 4.3.3��� All data measured for bulk transfer should be recorded promptly whe...
- UntitledSubclause3 - 4.3.4��� Whenever determinations of the contents of a tank are made before t...
- UntitledSubclause3 - 4.3.5��� All parts of the ALG in contact with the product or its vapour shou...
- UntitledSubclause3 - 4.3.6��� ALGs should have sufficient dynamic response to track the liquid le...
- UntitledSubclause3 - 4.3.7��� Following the transfer of product, the tank should be allowed to se...
- UntitledSubclause3 - 4.3.8��� Following a rapid change in the ambient conditions, the liquid surf...
- UntitledSubclause3 - 4.3.9��� ALGs should provide security to prevent unauthorized adjustment or ...
- Clause1 - 5��� Accuracy [Go to Page]
- Subclause2 - 5.1��� Intrinsic error of ALGs
- Subclause2 - 5.2��� Calibration prior to installation
- Subclause2 - 5.3��� Error caused by installation and operating conditions
- Subclause2 - 5.4��� Overall accuracy [Go to Page]
- Subclause3 - 5.4.1��� General
- Subclause3 - 5.4.2��� Use of ALGs for fiscal/custody transfer applications
- Clause1 - 6��� Installation of ALGs [Go to Page]
- Subclause2 - 6.1��� General
- Subclause2 - 6.2��� Mounting location [Go to Page]
- UntitledSubclause3 - 6.2.1��� The mounting location of an ALG may affect the installed accuracy. ...
- UntitledSubclause3 - 6.2.2��� The ALG should preferably be mounted as close as practical to the v...
- UntitledSubclause3 - 6.2.3��� The level-sensing element should be protected against excessive tur...
- Subclause2 - 6.3��� Manufacturer’s requirements
- Subclause2 - 6.4��� Installation [Go to Page]
- Subclause3 - 6.4.1��� Installation of intrusive ullage ALGs (e.g. float-operated and servo-operat... [Go to Page]
- UntitledSubclause4 - 6.4.1.1��� For fiscal/custody transfer application accuracy, the ALG should ...
- UntitledSubclause4 - 6.4.1.2��� For ease of maintenance and verification, the ALG should be insta...
- Subclause3 - 6.4.2��� Installation of intrusive ullage ALGs (e.g. float and servo-operated types)... [Go to Page]
- UntitledSubclause4 - 6.4.2.1��� For fiscal/custody transfer application accuracy and for operatio...
- UntitledSubclause4 - 6.4.2.2��� For ease of maintenance and verification, the ALG should be insta...
- Subclause3 - 6.4.3��� Installation of non-intrusive ullage ALGs (e.g. microwave or radar) mounted... [Go to Page]
- UntitledSubclause4 - 6.4.3.1��� For fiscal/custody transfer application accuracy, and also for op...
- UntitledSubclause4 - 6.4.3.2��� A datum plate which may serve as a reflector plate (shown in
- UntitledSubclause4 - 6.4.3.3��� The construction of the ALG may not require the installation of a...
- UntitledSubclause4 - 6.4.3.4��� Adequate means should be provided (e.g. verification pins positio...
- Subclause3 - 6.4.4��� Location of ALG
- Subclause3 - 6.4.5��� Installation of ALGs other than those described in this part of ISO 4266
- Subclause2 - 6.5��� Still-well design [Go to Page]
- UntitledSubclause3 - 6.5.1��� The still-well should be suspended from the top of the tank. The lo...
- UntitledSubclause3 - 6.5.2��� The diameter and thickness of the still-well should be designed to ...
- UntitledSubclause3 - 6.5.3��� The distance from the lower end of the still-well to the bottom of ...
- UntitledSubclause3 - 6.5.4��� The still-well perforations (slots or holes typically
- UntitledSubclause3 - 6.5.5��� After the tank has been hydrostatically tested, the still-well shou...
- Clause1 - 7��� Initial setting and initial verification of ALGs in the field [Go to Page]
- Subclause2 - 7.1��� Preparation [Go to Page]
- Subclause3 - 7.1.1��� Check for critical distances
- Subclause3 - 7.1.2��� Check for free movement of level-sensing element of intrusive ALGs
- Subclause3 - 7.1.3��� Check for influences of changes in physical and electrical properties of th...
- Subclause2 - 7.2��� Initial setting [Go to Page]
- Subclause3 - 7.2.1��� General
- Subclause3 - 7.2.2��� Setting of intrusive ullage ALGs [Go to Page]
- Subclause4 - 7.2.2.1��� Setting of an intrusive ullage ALG (e.g. float- or servo-operated ALG) on...
- Subclause4 - 7.2.2.2��� Setting of an intrusive ALG (e.g. float- or servo-operated ALG) with the ...
- Subclause3 - 7.2.3��� Setting of non-intrusive ALGs [Go to Page]
- Subclause4 - 7.2.3.1��� Setting of a non-intrusive ALG (e.g. microwave or radar-based ALG) on an ...
- Subclause4 - 7.2.3.2��� Setting of a non-intrusive ALG (e.g. microwave or radar-based ALG) with t...
- Subclause3 - 7.2.4��� Other ALGs not described in this part of ISO�4266
- Subclause2 - 7.3��� Initial field verification [Go to Page]
- Subclause3 - 7.3.1��� Introduction
- Subclause3 - 7.3.2��� Verification procedure [Go to Page]
- Subclause4 - 7.3.2.1��� Rounding off
- Subclause4 - 7.3.2.2��� Procedure
- Subclause4 - 7.3.2.3��� Resetting or readjustment of an ALG during initial field verification
- Subclause3 - 7.3.3��� Tolerance of initial field verification
- Subclause2 - 7.4��� Record keeping
- Clause1 - 8��� Subsequent verification of ALGs [Go to Page]
- Subclause2 - 8.1��� General
- Subclause2 - 8.2��� Frequency of subsequent verification
- Subclause2 - 8.3��� Procedure [Go to Page]
- UntitledSubclause3 - 8.3.1��� The liquid level at which the ALG is verified in a subsequent verif...
- UntitledSubclause3 - 8.3.2��� The subsequent verification can be performed by taking three consec...
- UntitledSubclause3 - 8.3.3��� For ALGs in fiscal/custody transfer applications, the average ALG r...
- Subclause2 - 8.4��� Tolerance for subsequent verification of ALGs in fiscal/custody transfer appl...
- Subclause2 - 8.5��� Comparison of the ALG readings from current and previous verifications [Go to Page]
- UntitledSubclause3 - 8.5.1��� For ALGs used in fiscal/custody transfer application, the average A...
- UntitledSubclause3 - 8.5.2��� Compare the average ALG reading from the current verification again...
- UntitledSubclause3 - 8.5.3��� Compare the average ALG reading from the current verification again...
- UntitledSubclause3 - 8.5.4��� If any of the tolerances described in
- Subclause2 - 8.6��� Adjustment in subsequent verification
- Clause1 - 9��� Data communication and receiving
- Bibliography - Bibliography [Go to Page]