BS ISO 4266-3:2002
Current
The latest, up-to-date edition.
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)
Hardcopy , PDF
English
12-09-2002
1 Scope
2 Normative reference
3 Terms and definitions
4 Precautions
4.1 Safety precautions
4.2 Equipment precautions
4.3 General precautions
5 Accuracy
5.1 Intrinsic error of ALGs
5.2 Calibration prior to installation
5.3 Error caused by installation and operating conditions
5.4 Overall accuracy
5.4.1 General
5.4.2 Use of ALGs for fiscal/custody transfer applications
6 Installation of ALGs
6.1 General
6.2 Mounting location
6.3 Manufacturer's requirements
6.4 Installation
6.4.1 Installation of intrusive ullage ALGs (e.g.
float-operated and servo-operated type) mounted
on still-wells
6.4.2 Installation of intrusive ullage ALGs (e.g. float
and servo-operated types) using guide wires
6.4.3 Installation of non-intrusive ullage ALGs (e.g.
microwave or radar) mounted on still-wells
6.4.4 Location of ALG
6.4.5 Installation of ALGs other than those described
in this part of ISO 4266
6.5 Still-well design
7 Initial setting and initial verification of ALGs in the field
7.1 Preparation
7.1.1 Check for critical distances
7.1.2 Check for free movement of level-sensing
element of intrusive ALGs
7.1.3 Check for influences of changes in physical
and electrical properties of the product (vapour/liquid)
7.2 Initial setting
7.2.1 General
7.2.2 Setting of intrusive ullage ALGs
7.2.3 Setting of non-intrusive ALGs
7.2.4 Other ALGs not described in this part of ISO 4266
7.3 Initial field verification
7.3.1 Introduction
7.3.2 Verification procedure
7.3.3 Tolerance of initial field verification
7.4 Record keeping
8 Subsequent verification of ALGs
8.1 General
8.2 Frequency of subsequent verification
8.3 Procedure
8.4 Tolerance for subsequent verification of ALGs in
fiscal/custody transfer application
8.5 Comparison of the ALG readings from current and
previous verifications
8.6 Adjustment in subsequent verification
9 Data communication and receiving
Bibliography
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