AS 24132:2025 adopts and modifies ISO 24132:2024 which specifies the design, minimum safety requirements, and inspection and testing procedures for liquefied hydrogen (LH2) marine transfer arms intended for use at onshore LH2 terminals handling LH2 carriers
Table of contents
Header
About this publication
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Abbreviated terms
5 Design of the arms
5.1 Definition and description of the arms
5.1.1 General
5.1.2 Arms dimensions
5.2 Design basis
5.2.1 Product line diameter and product data
5.2.2 Material and grades
5.2.3 Stress analysis
5.2.3.1 General
5.2.3.2 Loading combination
5.2.3.3 Allowable design stress
5.2.3.4 Pressure load
5.2.3.5 Fluid load
5.2.3.6 Ice build-up
5.2.3.7 Thermal load
5.2.3.8 Wind load
5.2.3.9 Earthquake load
5.2.3.10 Design stress procedure
5.2.4 Thermal analysis
5.3 Swivel joints
5.3.1 General
5.3.2 Product sealing arrangement
5.3.3 Bearing system
5.3.4 External sealing arrangement
5.3.5 Design
5.4 Structural bearings
5.4.1 Design
5.4.1.1 General
5.4.1.2 Static load
5.4.2 Protection of structural bearings
5.4.3 Grease sampling point
5.5 Accessories
5.5.1 Adjustable support (jack)
5.5.2 Product purge gases injection line
5.5.3 Stowing locking device
5.5.4 Ladders and platforms
5.5.5 Vapour recovery lines
5.5.6 Liquid nitrogen line
5.5.7 Ice fall protection
5.5.8 Process connections
5.5.9 Drain connection
5.5.10 Vacuum insulation
5.6 Welding
5.7 Corrosion protection and embrittlement protection
5.7.1 Corrosion protection
5.7.2 Embrittlement protection
5.8 Maintenance
6 Safety systems
6.1 General
6.2 Two stage alarm and shutdown system
6.2.1 First stage
6.2.2 Second stage
6.3 Monitoring and alarm systems
6.3.1 Alarm envelopes
6.3.2 Arm positioning alarms system
6.3.3 Arm constant position monitoring system (CPMS)
6.3.4 Pressure and hydraulic level alarm
6.4 ERS
6.4.1 General
6.4.2 Design of the ERS
6.4.3 Safety devices on the ERS
6.5 Safety devices
6.5.1 Fire safety requirements
6.5.2 Electrical safety requirements
6.5.2.1 General
6.5.2.2 Hazardous area classification
6.5.2.3 Electrical components
6.5.2.4 Lightning protection and earthing
6.5.3 Failure of power supply
6.5.3.1 General
6.5.3.2 Hydraulic power backup system
6.5.3.3 Electric power backup system
6.5.4 Stray current protectors
6.5.5 Bonding
6.5.6 Safety for liquid oxygen
7 Connection with the ship
7.1 General
7.2 Design of QCDC
7.3 QCDC system
7.4 Flange cover
8 Hydraulic and electric control systems
8.1 General
8.2 Arms operations
8.3 Hydraulic components
8.4 Electric components
8.5 Testing of control systems
8.6 Remote control
8.7 Transfer arms jetty control console
9 Inspections and tests
9.1 General
9.2 Prototype test
9.2.1 General
9.2.2 Swivel joint
9.2.2.1 Lifetime qualification dynamic test
9.2.2.1.1 Test protocol
9.2.2.1.2 Test acceptance criteria
9.2.2.2 Prototype test
9.2.2.2.1 Hydrostatic pressure test
9.2.2.2.2 Partial vacuum and leakage tests
9.2.2.2.3 Rotation test
9.2.2.2.4 Moisture protection test
9.2.2.2.5 Load capacity test
9.2.3 ERS
9.2.3.1 Hydrostatic pressure test
9.2.3.2 Pneumatic pressure test
9.2.3.3 Strength test
9.2.3.4 Valve operating test
9.2.3.5 Release performance test
9.2.3.6 Cryogenic seat leak test
9.2.4 Insulation flange
9.2.4.1 Hydrostatic pressure test
9.2.4.2 Pneumatic pressure test
9.2.4.3 Strength test
9.2.5 QCDC
9.2.5.1 Hydrostatic test
9.2.5.2 Pneumatic pressure test
9.2.5.3 Strength test
9.2.5.4 Emergency leakage test
9.2.5.5 Release performance test (hydraulic QCDC)
9.3 Manufacturing inspection and tests
9.3.1 General
9.3.2 Materials
9.3.3 Welding
9.3.4 Non-destructive test
9.3.4.1 Radiographic examination of welds
9.3.4.2 Penetrant inspection and magnetic particle inspection of welds
