LNG

Introduction

With the global liquefied natural gas (LNG) market forecast to double in size over the next decade, industry is readying to provide ample capacity to meet demand and ABS is at the forefront of setting classification standards for LNG carriers and related facilities such as offshore LNG terminals.

Experience

Practical experience and unmatched technical capability differentiate ABS from other class societies. Our major LNG differentiators include:

• Nearly 50 years of experience building and classing LNG carriers. Classed the first LNG carrier, the Methane Pioneer, in 1958.
• Classed first membrane LNG carrier built with Gaz Transport system in 1969 and first full size Technigaz Mk III system in 1999.
• Classed LNG carriers built in Sweden, UK, France, Italy, Spain, Japan, Korea, USA and now carriers being built in China.
• Developed analytical tools for structural analysis and fatigue evaluation specifically customized for membrane type LNG carriers.
• Developed the most sophisticated software and methodology for carrying out sloshing analysis using computation fluid dynamics (CFD) to calculate pressures imposed by LNG under various filling limits for North Atlantic environmental conditions.
• Developed comprehensive training program for ABS surveyors on LNG projects as well as owners personnel attending construction. This program conducted in locations all over the world.
• Among one of the first class societies to develop guidance for Building and Classing Offshore LNG Terminals.
• First class society to develop guidance for Design and Installation of Dual Fuel Engines for LNG carriers.
• Ability to grant ABS “approval in principle” or AIP to novel gas concepts by providing a preliminary assessment of a design or concept at its earliest stage.

ABS has been involved with the study of LNG in arctic operations. ABS ice class requirements are incorporated into its Steel Vessel Rules. The notations indicate the thickness and severity of the ice conditions for which the vessel has been designed and built. In the case of LNG carriers, ABS has applied direct calculation methodologies to identify the structural arrangements and optimal horsepower to meet the most stringent ice class requirements for transporting LNG. The three key requirements in assessing the ability of a carrier to navigate in ice are power, strength and prediction of the ice loads.

ABS studies, in conjunction with leading engine manufacturers, have led to practical guidance and criteria for the various propulsions systems on the market today that are being considered by LNG operators as an alternative to conventional steam turbines.

ABS classed LNG carriers have distinguished themselves by operating for more than 30 years with minimum downtime or repairs. ABS has nearly 200 surveyors qualified in surveying these specialized vessels. LNG survey staff is located at major LNG trading ports and repair and inspection facilities.

Classification Activity

Overall classification activities include:

• Review design calculations as required by the Rules
• Review design drawings
• Surveys during manufacture and certification of materials, equipment and machinery
• Surveys during construction
• Witness operational tests including dock and gas trials
• Surveys after delivery to maintain class

How we can assist you:

• Engineering Services
• Structural Analysis
• Analytical Tools

ABS Contacts

For General Gas Inquiries Email: ABSGasEnergy@eagle.org