1、 Guide for Building and Classing Regasification Vessels GUIDE FOR BUILDING AND CLASSING LNG REGASIFICATION VESSELS APRIL 2017 American Bureau of Shipping Incorporated by Act of Legislature of the State of New York 1862 2017 American Bureau of Shipping. All rights reserved. ABS Plaza 16855 Northchase
2、 Drive Houston, TX 77060 USA Foreword Foreword The industry and ABS share a large and successful body of experience with Liquefied Natural Gas (LNG) carriers. This Guide provides criteria that can be applied to LNG Carriers and LNG Barges proposed to be classed by utilizing the ABS Rules for Buildin
3、g and Classing Steel Vessels and/or ABS Rules for Building and Classing Steel Barges and fitted with regasification systems and components. Floating storage and regasification units (FSRUs) provide solutions to meet the energy demands of an ever-changing global market. Floating regasification is a f
4、lexible, cost-effective way to receive and process shipments of LNG. Floating regasification is increasingly being used to meet natural gas demand in smaller markets, or as a temporary solution until onshore regasification facilities are built. Floating regasification involves the use of a specializ
5、ed vessel often referred to as an FSRU, which is capable of transporting, storing, and regasifying LNG onboard. An FSRU can be purpose-built or be converted from a conventional LNG vessel by installing a regasification plant. Regasification plants are installed to vaporize the liquid gas onboard a v
6、essel, this may include self-propelled LNG carriers or Non-Self-Propelled LNG barges. The gas may be delivered to the shore side facility via various arrangements, such as turret system with delivery through an offshore buoy piping system or vessel manifold system to facility on platform, quay or si
7、milar. This Guide is to be used in conjunction with other ABS Rules and IMO Regulations. This Guide is for the use of designers, builders, owners and operators of liquefied gas carriers/tank barges and specifies the ABS requirements for obtaining the optional classification notation (LNG) R. This Gu
8、ide becomes effective on the first day of the month of publication. Users are advised to check periodically on the ABS website www.eagle.org to verify that this version of this Guide is the most current. We welcome your feedback. Comments or suggestions can be sent electronically by email to rsdeagl
9、e.org. ii ABSGUIDE FOR BUILDING AND CLASSING LNG REGASIFICATION VESSELS .2017 Table of Contents GUIDE FOR BUILDING AND CLASSING LNG REGASIFICATION VESSELS CONTENTS SECTION 1 Scope and Conditions of Classification . 5 1 Scope and Application 5 3 Classification Notations . 5 5 Definitions . 5 7 Materi
10、als of Construction 6 9 Certification . 6 11 Alternatives . 6 SECTION 2 Vessel Arrangements and System Design . 7 1 Application 7 3 Plans and Data to be Submitted . 7 5 Risk Assessment 8 5.1 Assessment Criteria 8 7 Mooring . 9 9 Turret Compartment Arrangements 9 9.1 Structural Fire Protection . 9 9.
11、3 Fire Propagation 9 9.5 Explosion or Uncontrolled High-pressure Gas Release 9 11 Sloshing 9 13 Regasification System and Equipment . 10 13.1 General 10 13.3 Pressure Vessels 10 13.5 Pumps . 10 13.7 Compressors . 10 13.9 Pressure Relief and Venting System . 11 13.11 Depressurization/Blowdown system
12、11 13.13 Turret Compartment Transfer Systems . 11 15 Electrical Systems and Installations . 12 15.1 Hazardous Areas . 12 17 Fire Safety . 12 17.1 Water Spray System . 12 17.3 Dry Chemical Powder Fire-extinguishing Systems 12 17.5 Ventilation 13 17.7 Fire Detection System . 13 17.9 Gas Detection Syst
13、em . 13 ABSGUIDE FOR BUILDING AND CLASSING LNG REGASIFICATION VESSELS .2017 iii 19 Instrumentation and Control Systems . 13 21 Emergency Shutdown (ESD) System Control 14 23 Cargo Operations Manuals . 14 SECTION 3 Surveys . 15 1 Surveys During Installation and Trials 15 1.1 Surveys During Installatio
14、n 15 1.3 Surveys During Trials 15 3 Surveys After Construction and Maintenance of Class 15 3.3 Tail Shaft Surveys 17 iv ABSGUIDE FOR BUILDING AND CLASSING LNG REGASIFICATION VESSELS .2017 Section 1: Scope and Conditions of Classification SECTION 1 Scope and Conditions of Classification 1 Scope and A
15、pplication This Guide has been developed to provide guidance for the design, construction, and survey of Liquefied Natural Gas (LNG) vessels utilizing regasification systems. The Guide focuses on systems and arrangements provided for the safe delivery of natural gas by means of regasification system
16、s. The Guide applies to LNG vessel types that fall under the scope of the IGC Code and associated ABS requirements for Vessels Intended to Carry Liquefied Gases in Bulk under Part 5C, Chapter 8 of the ABS Rules for Building and Classing Steel Vessels (Steel Vessel Rules) or the ABS Rules for Buildin
17、g and Classing Steel Barges (Barge Rules). In general, vessels are to comply with the requirements contained in the ABS requirements for Vessels Intended to Carry Liquefied Gases in Bulk under Part 5C, Chapter 8 of the Steel Vessel Rules or the Barge Rules, as applicable, and the requirements of thi
18、s Guide to receive the notations listed in Section 1/3. This Guide applies to both new construction and existing vessel conversions, regardless of size, utilizing regasification systems. 3 Classification Notations Vessels that comply with this Guide and are intended to operate in a regasification an
19、d gas discharge role, are eligible for ABS classification which will be denoted with the additional notation (LNG) R, so that the class notation as it appears in the Record will be: null A1 Liquefied Gas Carrier, (LNG) R or null A1 Liquefied Gas Tank Barge, (LNG) R 5 Definitions The definitions cont
20、ained in 5C-8-1/2 of the Steel Vessel Rules are applicable. The following definitions are applied to the terms used in this Guide: Cargo Machinery Spaces. The spaces where cargo compressors or pumps, cargo processing units, are located, including those supplying gas fuel to the engine-room. Floating
21、 Storage and Regasification Unit (FSRU). A vessel that has LNG storage as well as regasification equipment for LNG vaporizing. Gas Process Unit. Booster pumps, process pressure vessel, regasification plant. Regasification Plant. All systems and components for removing liquefied gas from the storage
22、tanks, pressurizing, heating and vaporizing liquefied gas and discharge ashore of vaporized gas through an off-loading system. If there are compressors or odorizes in the discharge system, they would be considered part of the Regasification Plant. Turret Compartments. Those spaces and trunks that co
23、ntain equipment and machinery for retrieval and release of the disconnectable turret mooring system, high-pressure hydraulic operating systems, fire protection arrangements and cargo transfer valves. Upset Condition. Interruptions in the regular running of the work process or other planned activity.
24、 Any distraction or break in the normal work routine is considered an Upset Condition. ABSGUIDE FOR BUILDING AND CLASSING LNG REGASIFICATION VESSELS .2017 5 Section 1 Scope and Conditions of Classification 7 Materials of Construction Materials in general are to comply with the requirements of the AB
25、S Rules for Materials and Welding (Part 2). Materials used in gas tanks, gas piping, process pressure vessels, and other components in contact with cryogenic liquids or gases are to be suitable for the intended purpose and in compliance with Section 5C-8-6 of the Steel Vessel Rules. 9 Certification
26、Design review, survey, testing, and the issuance of reports or certificates constitute the certification of machinery, equipment and systems; see also 4-1-1/3 of the Steel Vessel Rules. 11 Alternatives Equipment, components, and systems for which there are specific requirements in this Guide, or its
27、 associated references, may incorporate alternative arrangements or comply with the requirements of alternative recognized standards, in lieu of the requirements in this Guide. These alternative arrangements or standards are to be determined by ABS as being not less effective than the overall safety
28、 and strength requirements of this Guide or associated references. Where applicable, requirements may be imposed by ABS in addition to those contained in the alternative arrangements or standards so that the intent of this Guide is met. In all cases, the equipment, component or system is subject to
29、design review, survey during construction, tests and trials, as applicable, by ABS for purposes of verification of its compliance with the alternative arrangements or standards. The verification process is to be to the extent as intended by this Guide. 6 ABSGUIDE FOR BUILDING AND CLASSING LNG REGASI
30、FICATION VESSELS .2017 Section 2: Vessel Arrangements and System Design SECTION 2 Vessel Arrangements and System Design 1 Application The requirements specified in this Section provide general guidance on ship arrangements and regasification plant design. 3 Plans and Data to be Submitted The followi
31、ng regasification plant plans, calculations and information, as applicable, are to be submitted in addition to those required by 4-1-1/5.3 and 5C-8-1/5 of the Steel Vessel Rules, as applicable: General arrangement of the regasification plant Hazardous area arrangement Booklet of installations in cla
32、ssified hazardous areas Risk assessment Operational manual Scantlings and details of foundation drawing in way of regasification and power generation modules Strength analysis document in way of regasification and power generation modules. Cargo containment and Pump Tower strength analysis (sloshing
33、) Escape routes Project specification and overall process concept description Machinery arrangement of regasification plant and power generation system Ventilation system for compartment of cargo machinery space and turret, if applicable Cryogenic spill containment Failure Modes and Effects Analysis
34、 (FMEA) (As required by Subsection 2/19) Emergency shutdown (ESD) system ESD Cause and effect diagram Fire and gas detection and alarm systems Fire extinguishing systems Piping and Instrumentation Diagram (P or Section VIII Div. 2 Standards of Tubular Exchanger Manufacturers Association API Std. 660
35、 Shell-and-tube Heat Exchangers Other national standards or codes will be considered, provided that they are no less effective. 13.5 Pumps Each size and type of pump is to be approved through design assessment and prototype testing in accordance with 5C-8-5/13.1.3 of the Steel Vessel Rules. The foll
36、owing standards may be suitable for assessment of regasification equipment: ISO 13709 Centrifugal pumps for petroleum, petrochemical and natural gas industries ISO 24490 Cryogenic vessels Pumps for cryogenic service API Std 610 Centrifugal Pumps for Petroleum, Petrochemical and Natural Gas Industrie
37、s 13.7 Compressors Compressors are to be suitable for their intended purpose. All equipment and machinery is to be adequately designed for use within a marine environment. Each size and type of compressor is to be design assessed and prototype tested in accordance with 5C-8-5/13.1.4 of the Steel Ves
38、sel Rules. 10 ABSGUIDE FOR BUILDING AND CLASSING LNG REGASIFICATION VESSELS .2017 Section 2 Vessel Arrangements and System Design The following standards may be suitable for assessment of regasification equipment: API Std 617 Axial and Centrifugal Compressors and Expander-compressors for Petroleum,
39、Chemical and Gas Industry Services API Std 618 Reciprocating Compressors for Petroleum, Chemical, and Gas Industry Services API Std 619 Rotary-Type Positive-Displacement Compressors for Petroleum, Petrochemical, and Natural Gas Industries 13.9 Pressure Relief and Venting System Pressure safety relie
40、f valves and venting arrangements and locations are to comply with Section 5C-8-8 of the Steel Vessel Rules. Pressure losses upstream and downstream of the PRVs are to be taken into account when determining their size as required by 5C-8-8/4.1 and 5C-8-8/4.2 of the Steel Vessel Rules. The outlet fro
41、m pressure relief valves in LNG piping or in vapor piping which could see LNG in any failure mode is to be specially considered during the risk assessment so that the passing of LNG will not create a downstream hazard which has not been fully considered in the design and safety features. The followi
42、ng standards may be suitable for assessment of regasification equipment: ASME Section VIII, Division 1 Appendix M. API Std 520 Sizing, Selection, and Installation of Pressure-relieving Devices API Std 521 Pressure-relieving and Depressuring Systems 13.11 Depressurization/Blowdown system The regasifi
43、cation plant is to be provided with a blow down system (vapor depressuring) to limit the consequences of equipment and piping failure during emergency conditions. Vapor depressuring should follow the design principles in API 521. i) Manual activation of the blowdown system is to be provided. ii) Aut
44、omatic activation of the blowdown system is to be provided if required to safely perform an emergency function as associated with ESD functions as identified the risk assessment, (e.g. emergency buoy release (where fitted), loss of ESD valve actuating medium, fire detection, and emergency push butto
45、ns). iii) The blow down valves are to be fail safe. iv) Activation of blow down system is to be provided with visual and audible alarm in cargo control room and in cargo area to alert crew. 13.13 Turret Compartment Transfer Systems For the transfer of vapor cargo through an internal turret arrangeme
46、nt located outside the cargo area, the piping serving this purpose is to comply with 5C-8-5/2.2 of the Steel Vessel Rules, as applicable, and the following: i) Piping is to be located above the weather deck, except for the connection to the turret; Portable arrangements are not permitted. ii) Arrang
47、ements are to be made to allow such piping to be purged and gas-freed after use. The vent pipes connected with the purge are to be located in the cargo area. iii) Cargo piping and related piping equipment outside the cargo area is to have only welded connections. iv) The piping is to be full penetra
48、tion butt-welded, and subjected to full radiographic or ultrasonic inspection, regardless of pipe diameter and design temperature. Flange connections in the piping are to only be permitted within the cargo area and at connections to cargo hoses and the turret connection. ABSGUIDE FOR BUILDING AND CL
49、ASSING LNG REGASIFICATION VESSELS .2017 11 Section 2 Vessel Arrangements and System Design 15 Electrical Systems and Installations Electrical installations are to be in accordance with the applicable requirements of Part 4, Chapter 8 and Section 5C-8-10 of the Steel Vessel Rules. 15.1 Hazardous Areas Hazardous area are defined by 5C-8-1/2.24 of the Steel Vessel Rules. Hazardous area zoning is to be defined in accordance with 5C-8-10/1.1 of the Steel Vessel Rules and IEC 60092 -502: 1999. Consideration is to be
