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

Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English

Published date

05-24-2017

Publisher

International Organization for Standardization

ISO 19970:2017 specifies minimum requirements to quantify the boil-off gas (BOG) consumed on liquefied natural gas (LNG) carriers for their own functions, notably for power generation, during cargo transfer operations. BOG in this document refers to the low molecular gas returned from shore tanks to ships' tanks and the gas produced in ships' cargo tanks.

ISO 19970:2017 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 introduces performance requirements and calibration of the elements included in the BOG measurement system. A flowmeter of any type may be used to measure BOG as long as it meets the performance requirements specified in this document.

ISO 19970:2017, with some modification, can also be applied to the measurement of BOG consumed by LNG carriers at sea.

DevelopmentNote	Supersedes ISO/DIS 19970. (05/2017)
DocumentType	Standard
Pages	10
ProductNote	THIS STANDARD ALSO REFERS TO OIML R 137-2
PublisherName	International Organization for Standardization
Status	Current

Standards	Relationship
BS ISO 19970:2017	Identical

ISO 6976:2016	Natural gas — Calculation of calorific values, density, relative density and Wobbe indices from composition
ISO 5168:2005	Measurement of fluid flow — Procedures for the evaluation of uncertainties
ISO 8310:2012	Refrigerated hydrocarbon and non-petroleum based liquefied gaseous fuels — General requirements for automatic tank thermometers on board marine carriers and floating storage
ISO 1998-6:2000	Petroleum industry — Terminology — Part 6: Measurement
ISO 14511:2001	Measurement of fluid flow in closed conduits Thermal mass flowmeters
ISO 18132-1:2011	Refrigerated hydrocarbon and non-petroleum based liquefied gaseous fuels — General requirements for automatic tank gauges — Part 1: Automatic tank gauges for liquefied natural gas on board marine carriers and floating storage
IEC 60092-504:2016	Electrical installations in ships - Part 504: Automation, control and instrumentation
ISO/IEC Guide 99:2007	International vocabulary of metrology Basic and general concepts and associated terms (VIM)
ISO 5167-2:2003	Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full Part 2: Orifice plates
OIML R 137-1 : 2006	GAS METERS - PART 1: REQUIREMENTS
ISO 5167-1:2003	Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full Part 1: General principles and requirements
ISO 10790:2015	Measurement of fluid flow in closed conduits Guidance to the selection, installation and use of Coriolis flowmeters (mass flow, density and volume flow measurements)
ISO 6578:2017	Refrigerated hydrocarbon liquids — Static measurement — Calculation procedure
ISO 17089-1:2010	Measurement of fluid flow in closed conduits - Ultrasonic meters for gas Part 1: Meters for custody transfer and allocation measurement
ISO 2186:2007	Fluid flow in closed conduits — Connections for pressure signal transmissions between primary and secondary elements
IEC 60092-101:1994+AMD1:1995 CSV	Electrical installations in ships - Part 101: Definitions and general requirements
ISO 10976:2015	Refrigerated light hydrocarbon fluids — Measurement of cargoes on board LNG carriers
API TR 2571 : 2011	FUEL GAS MEASUREMENT
OIML R 140 : 2007	MEASURING SYSTEMS FOR GASEOUS FUEL
ISO 4006:1991	Measurement of fluid flow in closed conduits — Vocabulary and symbols
ISO/IEC Guide 98-3:2008	Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)