ISO 6919:2024 PDF

Measurement of refrigerated hydrocarbon and non-petroleum based liquefied gaseous fuels — Dynamic measurement of liquefied natural gas (LNG) as marine fuel — Truck-to-ship (TTS) bunkering

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Title (English):

ISO 6919:2024

Measurement of refrigerated hydrocarbon and non-petroleum based liquefied gaseous fuels — Dynamic measurement of liquefied natural gas (LNG) as marine fuel — Truck-to-ship (TTS) bunkering

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 27
Publication date:: July 2, 2024
Edition:: ISO IS 6919 edition 1 version 1
ICS:: 75.180.30

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Description (English):

This document defines procedures and requirements for measuring liquefied natural gas (LNG) from truck-to-ship (TTS) using the combination of Coriolis mass flowmeter (MFM) and gas chromatography (GC). It also gives guidance and requirements for portable packaging of the combination system in mobile form which minimizes facility storage space and streamlines the use of development systems. Output from the system in calorie units is applicable to commercial transactions between suppliers and users of liquefied natural gas (LNG) as marine fuel. This document also consists of general requirements, metrological requirements, system flawless requirements, requirements and test methods, and procedures for measurement methods.

Technical details

Technical committee: ISO/TC 28/SC 5 - Measurement of refrigerated hydrocarbon and non-petroleum based liquefied gaseous fuels
SKU: ISO 6919:2024

Abstract

Overview

ISO 6919:2024 specifies procedures and requirements for dynamic measurement of liquefied natural gas (LNG) delivered by truck-to-ship (TTS) bunkering. The standard mandates the combined use of a Coriolis mass flowmeter (MFM) and gas chromatography (GC) to determine transferred mass and fuel calorific value. It also provides guidance for portable packaging of the combined measurement system so mobile units minimize facility footprint and speed deployment. Output in calorie units is suitable for commercial transactions between LNG suppliers and ship operators.

Key topics and technical requirements

Measurement system combination: Use of Coriolis MFM for mass and online GC for composition/quality measurement.
Metrological requirements: Installation, calibration, verification and uncertainty management for both MFM and GC (see clauses on MFM system verification and GC system verification).
Portable packaging: Guidance for mobile, compact measurement systems that reduce storage needs and streamline TTS operations.
Measurement procedures: Detailed steps for MFM quantity measurement, GC quality measurement, documentation, calibration and handling of MFM failures or quantity disputes.
Energy calculation: Methods for calculating net/gross calorific values and density to produce energy results (J/kg or calorie units) for commercial use.
System tests and maintenance: Requirements and test methods for routine verification, maintenance and sealing of the custody-transfer system.
Safety and operational controls: General safety precautions, PPE, alcohol/drug-free requirements, and references to TTS bunkering checklists (Annex D) and risk assessment expectations.

Practical applications and users

ISO 6919:2024 is intended for practical implementation in commercial LNG bunkering operations where truck deliveries fuel vessels. Primary users include:

Bunker suppliers and mobile metering system providers deploying TTS units
Ship operators and chief engineers accepting LNG bunkers and reconciling energy/quantity for voyage planning and fuel accounting
Port authorities and terminal operators managing TTS operations and safety zones
Meter manufacturers, calibration labs and metrologists responsible for verification, installation and certification of MFM/GC systems
Independent bunker surveyors and auditors performing custody-transfer verification and dispute resolution

Related standards

Key referenced standards include ISO 22192 (MFM bunkering), ISO 10790 (Coriolis flowmeter guidance), ISO 6974-1 and ISO 6976 (gas composition and calorific calculations), ISO 21903, and ISO 6578. These provide complementary requirements for installation, analysis and energy calculations.

Keywords: ISO 6919:2024, LNG, truck-to-ship, TTS bunkering, Coriolis mass flowmeter, gas chromatography, portable measurement system, calorific value, metrological requirements, bunkering measurement.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and technical requirements

Measurement system combination: Use of Coriolis MFM for mass and online GC for composition/quality measurement.
Metrological requirements: Installation, calibration, verification and uncertainty management for both MFM and GC (see clauses on MFM system verification and GC system verification).
Portable packaging: Guidance for mobile, compact measurement systems that reduce storage needs and streamline TTS operations.
Measurement procedures: Detailed steps for MFM quantity measurement, GC quality measurement, documentation, calibration and handling of MFM failures or quantity disputes.
Energy calculation: Methods for calculating net/gross calorific values and density to produce energy results (J/kg or calorie units) for commercial use.
System tests and maintenance: Requirements and test methods for routine verification, maintenance and sealing of the custody-transfer system.
Safety and operational controls: General safety precautions, PPE, alcohol/drug-free requirements, and references to TTS bunkering checklists (Annex D) and risk assessment expectations.

Practical applications and users

ISO 6919:2024 is intended for practical implementation in commercial LNG bunkering operations where truck deliveries fuel vessels. Primary users include:

Bunker suppliers and mobile metering system providers deploying TTS units
Ship operators and chief engineers accepting LNG bunkers and reconciling energy/quantity for voyage planning and fuel accounting
Port authorities and terminal operators managing TTS operations and safety zones
Meter manufacturers, calibration labs and metrologists responsible for verification, installation and certification of MFM/GC systems
Independent bunker surveyors and auditors performing custody-transfer verification and dispute resolution

ISO 6919:2024 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Practical applications and users

Related standards

Related standards

Abstract

Overview

Key topics and technical requirements

Practical applications and users

Related standards

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