BS ISO 4266-3:2002
$142.49
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)
| Published By | Publication Date | Number of Pages |
| BSI | 2002 | 24 |
This part of ISO 4266 gives guidance on the accuracy, installation, commissioning, calibration and verification of automatic level gauges (ALGs) both intrusive and non-intrusive, for measuring the level of petroleum and petroleum products having a vapour pressure less than 4 MPa, stored in pressurized storage tanks.
This part of ISO 4266 gives guidance on the use of ALGs in custody transfer application.
This part of ISO 4266 is not applicable to the measurement of level in caverns and refrigerated storage tanks with ALG equipment.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 3 | TitlePage – Petroleum and liquid petroleum products�— Measurement of level and temperature in sto… |
| 5 | TableofContent – Contents Page |
| 7 | Foreword – Foreword |
| 9 | Scope – 1��� Scope NormativeReference – 2��� Normative reference |
| 11 | Clause1 – 4��� Precautions Subclause2 – 4.1��� Safety precautions Subclause2 – 4.2��� Equipment precautions 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 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 … |
| 12 | Clause1 – 5��� Accuracy 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 Subclause3 – 5.4.1��� General |
| 13 | Subclause3 – 5.4.2��� Use of ALGs for fiscal/custody transfer applications Clause1 – 6��� Installation of ALGs Subclause2 – 6.1��� General Subclause2 – 6.2��� Mounting location 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 Subclause3 – 6.4.1��� Installation of intrusive ullage ALGs (e.g. float-operated and servo-operat… 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)… UntitledSubclause4 – 6.4.2.1��� For fiscal/custody transfer application accuracy and for operatio… |
| 16 | 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… 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 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… |
| 18 | Clause1 – 7��� Initial setting and initial verification of ALGs in the field Subclause2 – 7.1��� Preparation 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 Subclause3 – 7.2.1��� General |
| 19 | Subclause3 – 7.2.2��� Setting of intrusive ullage ALGs 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 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… |
| 20 | Subclause3 – 7.2.4��� Other ALGs not described in this part of ISO�4266 Subclause2 – 7.3��� Initial field verification Subclause3 – 7.3.1��� Introduction Subclause3 – 7.3.2��� Verification procedure 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 |
| 21 | Subclause3 – 7.3.3��� Tolerance of initial field verification Subclause2 – 7.4��� Record keeping Clause1 – 8��� Subsequent verification of ALGs Subclause2 – 8.1��� General Subclause2 – 8.2��� Frequency of subsequent verification Subclause2 – 8.3��� Procedure 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… |
| 22 | Subclause2 – 8.5��� Comparison of the ALG readings from current and previous verifications 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 |
| 23 | Bibliography – Bibliography |
