Draft International Standard
ISO/DIS 19970
Refrigerated hydrocarbon and non-petroleum based liquefied gaseous fuels — Metering of gas as fuel on LNG carriers during cargo transfer operations
Reference number
ISO/DIS 19970
Edition 2
International Standard
Read sample
ISO/DIS 19970
This Draft International Standard is in the enquiry phase with ISO members.
Will replace ISO 19970:2017

ISO/DIS 19970

ISO/DIS 19970
CHF 63
Convert Swiss francs (CHF) to your currency


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.

General information

  •  : Under development
    : Close of voting [40.60]
  •  : 2
     : 13
  • ISO/TC 28/SC 5
  • RSS updates

Got a question?

Check out our Help and Support

Check out our FAQs

Customer care
+41 22 749 08 88

Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)