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ISO 19970:2025

Refrigerated hydrocarbon and non-petroleum based liquefied gaseous fuels — Metering of gas as fuel on LNG carriers during cargo transfer operations ISO 19970:2025

Publication date:   Jul 11, 2025

General information

60.60   Standard published   Jul 11, 2025

ISO

ISO/TC 28/SC 5 Measurement of refrigerated hydrocarbon and non-petroleum based liquefied gaseous fuels

International Standard

75.180.30   Volumetric equipment and measurements

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Scope

This document specifies the minimum requirements to quantify boil-off gas (BOG) consumed on liquefied natural gas (LNG) carriers for their own functions, in particular for power generation and during cargo transfer operations.
This document provides requirements for the metering of BOG and the subsequent calorific value calculations, which can be taken into account when the energy transferred during cargo transfer is determined. This document also gives performance requirements and calibration of the elements included in the BOG measurement system.
This document, with some modifications, can also be applied to the measurement of BOG consumed by LNG carriers at sea.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 19970:2017

NOW

PUBLISHED
ISO 19970:2025
60.60 Standard published
Jul 11, 2025




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