ABS Requirements for Building and Classing Floating Offshore Liquefied Gas Terminals
Year: 2024 Language: English Author: ABS Edition: August,2024 Format: PDF Quality: eBook Pages count: 379 Description: The industry and ABS share a large and successful body of experience with membrane tank Liquefied Natural Gas (LNG) carriers, independent tank liquefied gas carriers and ship-type FPSOs that have been designed to Part 5C, Chapter 12 of the ABS Rules for Building and Classing Marine Vessels, ABS Guide for Building and Classing Liquefied Gas Carriers with Independent Tanks, and ABS Rules for Building and Classing Floating Production Installations (FPI Rules), respectively. The development of these ABS Requirements for Building and Classing Floating Offshore Liquefied Gas Terminals is based on the design and analyses experience with these types of vessels. This document provides criteria that can be applied in the Classification of the hull and tank structure of floating offshore liquefied gas terminals with membrane tanks or independent prismatic tanks. The document addresses liquefied gas terminals with ship-shaped or barge-shaped hull forms having a single row of cargo tanks at centerline or a row of two cargo tanks abreast. ABS recognizes that industry participation is a vital factor due to the rapidly progressing use of offshore gas terminals. To understand and apply this new technology and its standards, ABS, the offshore and onshore community and regulatory agencies can benefit from a common understanding of the terms and concepts involved, and an awareness of how these concepts are to be applied to ABS rule-making. The hull strength criteria contained herein are to be considered as an alternative to those for corresponding aspects of Classification as given in Part 5C, Chapter 8 of the Marine Vessel Rules (MVR 5C-8) which includes requirements from the International Code for the Construction and Equipment of Ships carrying Liquefied Gases in Bulk (IGC Code). The Owner may elect to use either this document or MVR 5C-8. In the same design, for aspects of the hull structural design that are covered by both this document and MVR 5C-8 it is not valid to switch between the criteria in this document and MVR 5C-8. This document does not cover the design, fabrication and installation of the liquefied gas containment system, except for the structural design of independent tanks. The June 2021 edition added the optional FLM (number of years), Year notation for position mooring system fatigue life, in line with the FPI Rules. This provides the flexibility to accept different fatigue life notations for position mooring and hull structure, including hull interfaces. The December 2021 edition applied the RFL and RFLM notations to converted floating offshore liquefied gas terminals, similar to converted FPIs, following the methodology described in Section 5A-2-3 of the ABS Rules for Building and Classing Floating Production Installations. The August 2023 edition provided requirements for the Topside Modules notation for topside module structures of a FLNG terminal in which gas processing, production and liquefaction facilities are not requested to be classed. The January 2024 edition provided references to the ABS Guide for Building and Classing Liquefied Gas Carriers with Independent Tanks the for the procedure and acceptance criteria of the crack propagation and fatigue fracture analysis for type B independent tanks. The August 2024 version changes the document type from “Guide” to “Requirements”. “Requirements” documents contain mandatory criteria for Classification and issuance of Class Certificates, while Guides contain only requirements for optional Notations (see 1A-1-4/1.5 of the ABS Rules for Conditions of Classification (Part 1A)). The title is changed from “Guide for Building and Classing Floating Offshore Liquefied Gas Terminals” to “Requirements for Building and Classing Floating Offshore Liquefied Gas Terminals”. Accordingly, editorial changes are made throughout this document. This document becomes effective on the first day of the month of publication.
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ABS Requirements for Building and Classing Floating Offshore Liquefied Gas Terminals
Language: English
Author: ABS
Edition: August,2024
Format: PDF
Quality: eBook
Pages count: 379
Description: The industry and ABS share a large and successful body of experience with membrane tank Liquefied Natural Gas (LNG) carriers, independent tank liquefied gas carriers and ship-type FPSOs that have been designed to Part 5C, Chapter 12 of the ABS Rules for Building and Classing Marine Vessels, ABS Guide for Building and Classing Liquefied Gas Carriers with Independent Tanks, and ABS Rules for Building and Classing Floating Production Installations (FPI Rules), respectively. The development of these ABS Requirements for Building and Classing Floating Offshore Liquefied Gas Terminals is based on the design and analyses experience with these types of vessels.
This document provides criteria that can be applied in the Classification of the hull and tank structure of floating offshore liquefied gas terminals with membrane tanks or independent prismatic tanks. The document addresses liquefied gas terminals with ship-shaped or barge-shaped hull forms having a single row of cargo tanks at centerline or a row of two cargo tanks abreast. ABS recognizes that industry participation is a vital factor due to the rapidly progressing use of offshore gas terminals. To understand and apply this new technology and its standards, ABS, the offshore and onshore community and regulatory agencies can benefit from a common understanding of the terms and concepts involved, and an awareness of how these concepts are to be applied to ABS rule-making.
The hull strength criteria contained herein are to be considered as an alternative to those for corresponding aspects of Classification as given in Part 5C, Chapter 8 of the Marine Vessel Rules (MVR 5C-8) which includes requirements from the International Code for the Construction and Equipment of Ships carrying Liquefied Gases in Bulk (IGC Code). The Owner may elect to use either this document or MVR 5C-8. In the same design, for aspects of the hull structural design that are covered by both this document and MVR 5C-8 it is not valid to switch between the criteria in this document and MVR 5C-8. This document does not cover the design, fabrication and installation of the liquefied gas containment system, except for the structural design of independent tanks.
The June 2021 edition added the optional FLM (number of years), Year notation for position mooring system fatigue life, in line with the FPI Rules. This provides the flexibility to accept different fatigue life notations for position mooring and hull structure, including hull interfaces.
The December 2021 edition applied the RFL and RFLM notations to converted floating offshore liquefied gas terminals, similar to converted FPIs, following the methodology described in Section 5A-2-3 of the ABS Rules for Building and Classing Floating Production Installations.
The August 2023 edition provided requirements for the Topside Modules notation for topside module structures of a FLNG terminal in which gas processing, production and liquefaction facilities are not requested to be classed.
The January 2024 edition provided references to the ABS Guide for Building and Classing Liquefied Gas Carriers with Independent Tanks the for the procedure and acceptance criteria of the crack propagation and fatigue fracture analysis for type B independent tanks.
The August 2024 version changes the document type from “Guide” to “Requirements”. “Requirements” documents contain mandatory criteria for Classification and issuance of Class Certificates, while Guides contain only requirements for optional Notations (see 1A-1-4/1.5 of the ABS Rules for Conditions of Classification (Part 1A)). The title is changed from “Guide for Building and Classing Floating Offshore Liquefied Gas Terminals” to “Requirements for Building and Classing Floating Offshore Liquefied Gas Terminals”. Accordingly, editorial changes are made throughout this document.
This document becomes effective on the first day of the month of publication.
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