BS ISO 18132-1:2011

Foreword
Introduction
1 Scope
2 Terms, definitions and abbreviated terms
3 General safety precautions
4 Design requirements
5 Installation
6 Accuracy
7 Recertification of ATGs
8 ATG calibration records
Annex A (normative) - Calibration and
        verification of various ATGs
        in common use
Annex B (normative) - Calibration and
        verification of radar-type ATG
Annex C (normative) - Calibration and
        verification of capacitance-type
        ATG
Annex D (normative) - Calibration and
        verification of float-type ATG
Annex E (informative) - Accuracy limitations
        of LNG level measurement
Annex F (informative) - Uncertainty associated
        with accuracy test of float-type ATG
Bibliography

Covers general principles for the accuracy, installation, calibration and verification of automatic tank gauges (ATGs) used for custody transfer measurement of liquefied natural gas (LNG) on board an LNG carrier or floating storage.

This part of ISO18132 establishes general principles for the accuracy, installation, calibration and verification of automatic tank gauges (ATGs) used for custody transfer measurement of liquefied natural gas (LNG) on board an LNG carrier or floating storage.

The LNG described in this part of ISO18132 is either fully refrigerated (i.e. at the cryogenic condition), or partially refrigerated, and therefore the fluid is at or near atmospheric pressure.

This part of ISO18132 also specifies the technical requirements for data collection, transmission and reception. Specific technical requirements for various automatic tank gauges and accuracy limitations are given in the annexes.