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Home ShipmanagementBunkering DNV GL with first guidance on fiscal and quality measurements for LNG bunkering

DNV GL with first guidance on fiscal and quality measurements for LNG bunkering

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Martin Layfield


Martin Layfield

Until now, there has been no international standard describing the methods for fiscal measurements and suitability for liquefied natural gas (LNG) as a marine fuel, despite the growing international market for small scale LNG bunkering. DNV GL’s updated Recommended Practice (RP) is the first industry guidance on how to perform quality measurements and quantity metering of LNG fuel supply.

In order to continue meeting and supporting the market in its growing demand for cleaner fuels and versatile LNG applications, DNV GL has updated its RP for Development and operation of LNG bunkering facilities (DNVGL-RP-G105). The RP now includes a section dedicated to determining LNG quantity and its properties. The objective is to assist operators in addressing the large spread in properties, density and the calorific value among the available LNG sources globally.

This update is a key driver for the monetization of the LNG small scale distribution and infrastructure, helping to develop a more transparent and compatible market and to safeguard sustainable growth.

The RP enables the industry to understand the business impact of proper fiscal measurement. Gas from different sources with various compositions can result in substantial variation in energy content and burning properties. This may have implications for billing, the expected voyage distance and safe use in terms of operations.

“The specification of LNG as a marine fuel and required metering methodology has until now been a missing piece in the LNG as fuel puzzle, ” says Martin Layfield, global segment leader of the Gas Value Chain, DNV GL. “This new RP completes the picture and will provide a level playing field for the billing process of LNG and documentation around the gas quality.”

The RP focuses on four main elements: safe design and operation, safety management systems,  risk assessments and now also includes coverage on gas quality and quantity metering. The RP is in accordance with, but further elaborates on the ISO/TS 18683 Guidelines for systems and installations for supply of LNG as fuel to ships, with focus on bridging the gap between the rules for the receiving ship and the bunker supplier, such as national or port regulations and rules for LNG bunker vessels.

The scope of the DNVGL-RP-G105 covers activities and stakeholders involved in the development and operation of LNG bunkering facilities, including simultaneous operations on land and on the water. Elisabeth Tørstad, CEO of DNV GL – Oil & Gas, says “This RP aims to support the industry in the development and operation of safe LNG bunkering facilities and to ensure safety for people, the environment and compliance with regulatory targets.”

The RP is applicable to truck-to-ship, terminal-to-ship and ship-to-ship bunkering scenarios, as well as inland shipping and vessels not covered by the International Maritime Organization (IMO) regulations.

“LNG has proven to be a viable option as a bunkering fuel for ships and its use is set to soar over the next decade. As LNG is a hazardous substance, and by its nature has different risk properties than traditional fuel, the updated RP also elaborates further on how to establish proper safety zones including guidance on techniques and risk methodologies, ” adds Layfield. The RP also addresses the risk evaluations that may be used for strategic considerations in the planning phase of an LNG bunkering facility project.

Management of the risks associated with LNG continues to be developed, especially as the fuel supply is not yet widely carried out on a routine basis around the world. This is addressed by DNV GL in an ongoing Joint Industry Project (JIP) to enhance understanding of the risks and hazards in small-scale LNG bunkering stations which aims to provide experimental data to validate/improve physical models and answer safety related questions. This will result in rigorous standards for safe design, siting, construction and operation of small-scale LNG bunkering stations.

The Recommended Practice can be downloaded here: https://www.dnvgl.com/oilgas/download/download-dnvgl-rp-g105.html

About DNV GL
As of 12 September 2013, DNV and GL have merged to form DNV GL. Driven by our purpose of safeguarding life, property and the environment, DNV GL enables organizations to advance the safety and sustainability of their business. We provide classification and technical assurance along with software and independent expert advisory services to the maritime, oil & gas and energy industries. We also provide certification services to customers across a wide range of industries. With our origins stretching back to 1864, our reach today is global. Operating in more than 100 countries, our 16, 000 professionals are dedicated to helping our customers make the world safer, smarter and greener.

About DNV GL – Oil & Gas
In the oil and gas industry, GL Noble Denton and DNV’s Oil & Gas business have joined forces to enable safe, reliable and enhanced performance in projects and operations. We provide a broad range of services, such as technical assurance; marine assurance and advisory; risk management advisory and offshore classification. Our 4, 000 employees combine industry expertise, multidisciplinary skills and innovation to solve complex challenges for our customers. Together with our partners, we drive the industry forward by developing best practices and standards across the asset lifecycle.

About DNV GL – Maritime
DNV GL is the world’s leading classification society and a recognized advisor for the maritime industry. We enhance safety, quality, energy efficiency and environmental performance of the global shipping industry – across all vessel types and offshore structures. We invest heavily in research and development to find solutions, together with the industry, that address strategic, operational or regulatory challenges. DNV GL has the largest share of gas fuelled vessels and gas as fuel has been a strategic topic in the company the past 15 years.

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