PREN 1474-1 : DRAFT 2006

Foreword
1 Scope
2 Normative references
3 Terms, definitions and abbreviations
4 Design of the arms
   4.1 Definition of the length and the configuration of the
        arms, arms description
        4.1.1 General
        4.1.2 Balancing
        4.1.3 Arms dimensions and clearances
   4.2 Design basis
        4.2.1 Product line diameter and product data
        4.2.2 Material and grades
   4.3 Swivel joints
        4.3.2 Bearing system
        4.3.3 External sealing arrangement
        4.3.4 Design
   4.4 Structural bearings
        4.4.1 Cyclic movements
        4.4.2 Installation of structural bearings
        4.4.3 Protection of structural bearings
        4.4.4 Grease sampling point
   4.5 Accessories
        4.5.1 Adjustable support (Jack)
        4.5.2 Nitrogen injection line
        4.5.3 Storage locking device
        4.5.4 Ladders and platforms
        4.5.5 Liquid nitrogen line
        4.5.6 Thermal insulation
   4.6 Pipework and fitting
   4.7 Welding
        4.7.1 Qualification
        4.7.2 Filler metals
   4.8 Corrosion protection, fire proofing and embrittlement
        protection
        4.8.1 Corrosion protection
        4.8.2 Fire protection
        4.8.3 Embrittlement protection
   4.9 Maintenance
5 Safety systems
   5.1 Two stage alarm and shut down system
        5.1.1 First stage
        5.1.2 Second stage
   5.2 Monitoring and alarm systems
        5.2.1 Arms positioning alarms system (mechanical
               thresholds)
        5.2.2 Arm constant position monitoring systems (CPMS)
        5.2.3 Pressure and hydraulic level alarm
   5.3 Definition of alarm envelopes
   5.4 Safety devices
        5.4.1 Safety devices on emergency release system (ERS)
        5.4.2 Fire safety requirements
        5.4.3 Electrical safety requirements
        5.4.4 Failure of electrical power supply
        5.4.5 Stray current protectors
        5.4.6 Bonding
6 Connection with the ship
   6.1 Body
   6.2 Presentation flange
7 Hydraulic and electric control systems
   7.1 General
   7.2 Hydraulic components
   7.3 Electric components
   7.4 Jetty control centre equipment
   7.5 Remote control
   7.6 Jetty outside equipment
8 Inspection and tests
   8.1 General
        8.1.1 Hydrostatic test
        8.1.2 Pneumatic test
        8.1.3 Operational test
        8.1.4 Site operational test
   8.2 Shop testing of swivel joint, structure bearing testing
        8.2.1 Requirement for dynamic life time duration testing
              of product swivels
        8.2.2 Structure bearing testing
   8.3 Emergency Release System (ERS) Test
        8.3.1 General
        8.3.2 Strength test
        8.3.3 Release performance test
        8.3.4 Cryogenic valve seat test
        8.3.5 Hydraulic circuit
   8.4 QuickConnect/Disconnect Coupler (QCDC) Test
        8.4.1 General
        8.4.2 Functional test
        8.4.3 Strength test
        8.4.4 Release performance test (Hydraulic QCDC)
   8.5 Radiographic examination of welds
   8.6 Penetrant inspection of welds
   8.7 Material inspection
   8.8 Insulation flange (Stray current protector) test
        8.8.1 Shop test
        8.8.2 Site test
9 Quality assurance and control
   9.1 Quality system
   9.2 Quality plan
10 Required documentation
   10.1 Tender documentation
   10.2 Contract documentation
Appendix 1 (informative) - Suggestions for studies to be performed
           prior to enquiry for transfer arms
Appendix 2 (informative) - Suggestions for arms alarms setting and
           ESD/ERS activation
Annex A (Informative) - Materials
Annex B (informative) - Constant Position Monitoring System (CPMS)
Annex C (informative) - Bibliography
Tables
Figures

Defines the design, minimum safety requirements and inspection and testing procedures for liquefied natural gas (LNG) transfer arms intended for use on conventional onshore (LNG) terminals. It also covers the minimum requirements for safe LNG transfer between ship and shore.