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BS EN 1474-2:2020

BS EN 1474-2:2020

$198.66

Installation and equipment for liquefied natural gas. Design and testing of marine transfer systems – Design and testing of transfer hoses

Published By Publication Date Number of Pages
BSI 2020 68
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This European Standard gives general guidelines for the design, material selection, qualification, certification, and testing details for Liquefied Natural Gas (LNG) transfer hoses for offshore transfer or on coastal weather-exposed facilities for aerial, floating and submerged configurations or a combination of these. Whilst this European Standard is applicable to all LNG hoses, it is acknowledged that there may be further specific requirements for floating and submerged hoses. The transfer hoses will be designed to be part of transfer systems (it means that they will be fitted with ERS, QCDC, handling systems, hydraulic and electric components etc.) To avoid unnecessary repetition, cross-references to EN 1474-1 and EN 1474-3, are made for all compatible items, and for references, definitions and abbreviations. Where additional references, definitions and abbreviations are required specifically for LNG hoses, they are listed in this European Standard. Transfer hoses need to be durable when operating in the marine environment and to be flexible with a minimum bending radius compatible with handling and the operating requirements of the transfer system.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 1 Scope
2 Normative references
3 Terms, definitions and abbreviations
3.1 Terms and Definitions
12 3.2 Abbreviations
4 Applications and Qualification Categories
4.1 Applications
4.2 Qualification Categories
13 5 Description of typical LNG transfer hose assembly designs and accessories
5.1 General
5.2 Mandatory components
14 5.3 Optional components
5.4 Typical construction of LNG transfer hose assemblies
5.4.1 Main hose categories
15 5.4.2 Corrugated metal hose assemblies
17 5.4.3 Thermoplastic multi-layer (non-vulcanized) hose assemblies (Composite hose assemblies)
18 5.4.4 Hose-in-hose with annular space
19 6 Design features of the LNG transfer hoses assemblies
6.1 General
6.2 Transfer Hose Assembly technology design parameters
20 6.3 Project Specific Design Parameters
6.3.1 Selection of hose assembly length
6.3.2 Service life
6.3.3 Selection of buoyancy and submersion
6.3.4 Selection of insulation
21 6.3.5 Selection of external protection
6.3.6 Selection of leak detection
6.4 Component details – End fitting
6.4.1 General
22 6.4.2 Termination
6.4.3 Connector
6.4.4 Bending stiffener/restrictor (optional)
6.5 Hose assembly handling / lifting device
6.6 Safety systems
6.6.1 Leak detection (optional)
23 6.6.2 Fire safety requirements
6.6.3 Electrical safety requirements
6.7 Connection to the ship
6.8 Hydraulic and electric control systems
7 Qualification Requirements
7.1 Foreword
24 7.2 Qualification process
7.2.1 General Principle
7.2.2 Qualification Levels Specific Requirements
26 7.2.3 Certification range definition from a tested hose assembly
27 7.2.4 Certification extension and update
7.3 Hose Assembly tests
7.3.1 General
7.3.1.1 Safety considerations
7.3.1.2 Test liquids
7.3.1.3 Pressure and temperature requirements
28 7.3.1.4 Requirements for measurement equipment accuracy
7.3.2 Hose assembly property characterization tests
7.3.2.1 Tensile stiffness
30 7.3.2.2 Torsion stiffness
31 7.3.2.3 Bending stiffness
33 7.3.2.4 Hose assembly damping
34 7.3.2.5 Thermal insulation test
35 7.3.2.6 Buoyancy / Submerged Weight
36 7.3.2.7 Collapse Resistance
7.3.3 Qualification tests with acceptance criteria
7.3.3.1 Pressure leak test
38 7.3.3.2 Pressure and temperature cycle test
39 7.3.3.3 Burst test
40 7.3.3.4 Impact Load Test and Crush Load Test
41 7.3.3.5 Creep Test
7.3.3.6 Tensile and torsional axial operational load test
42 7.3.3.7 Bend radius test
43 7.3.3.8 Fatigue test
44 7.3.3.9 Flow Rate Tests
46 7.3.3.10 Electrical properties test
7.3.3.11 Leak Detection System Qualification test
8 Quality assurance and control
8.1 General
8.2 Material selection
47 8.3 Manufacturing
8.3.1 Manufacturing basics
8.3.2 Traceability
8.3.3 Marking
48 8.3.4 Packing and Preservation
8.4 Factory acceptance tests
8.4.1 General
8.4.2 Tests to be performed on every hose assembly
9 Documentation
9.1 Purchasing Guidelines
9.2 Design, Qualification and Manufacturing Documentation
49 9.3 As-built documentation/Manufacturing Data Book
9.4 Operation manual
51 Annex A (informative)Purchasing guidelines table
54 Annex B (informative)Guidelines for additional testing program
B.1 Introduction
B.2 Combined loads and in-service conditions to be considered
B.3 Damage tolerance philosophy applied to impact and crush loads
56 B.4 Damage tolerance philosophy for other degradation mechanisms and loads
57 B.5 Inspectability of the hose assembly condition
B.6 Guidance on impact and crush damage during normal operation
59 B.7 Guidance on creep
60 B.8 Guidance on wear
61 Annex C (Informative)Guidelines for Hose Qualification Categories (HQCs) Selection
63 Annex D (informative)Surge pressure considerations for LNG hose assemblies
64 Annex E (Informative)Pressure Leak Tests – justification about maximum allowed permeability rate and leak detection value

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BS EN 1474-2:2020
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