NEN EN ISO 14723 : 2009

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
   4.1 Symbols
   4.2 Abbreviated terms
5 Valve types and configurations
   5.1 Valve types
   5.2 Valve configuration
6 Design
   6.1 Design codes and calculations
   6.2 Pressure and temperature ratings
   6.3 Cavity relief
   6.4 External pressure and loads
   6.5 Sizes
   6.6 Face-to-face and end-to-end dimensions
   6.7 Minimum bore full-opening valves
   6.8 Valve operation
   6.9 Pigging
   6.10 Valve ends
   6.11 Bypass, drain and vent connections
   6.12 Handwheels and wrenches
   6.13 Locking devices
   6.14 Position indicators
   6.15 ROV interface
   6.16 Sealant injection
   6.17 Lifting lugs
   6.18 Actuators/gearbox
   6.19 Drive trains
   6.20 Stem shaft protector
   6.21 Hydraulic lock
   6.22 Corrosion/erosion
   6.23 Hyperbaric performance
   6.24 Design document review
7 Material
   7.1 Material specification
   7.2 Service compatibility
   7.3 Forged parts
   7.4 Composition limits
   7.5 Toughness test requirements
   7.6 Bolting
   7.7 Sour service
8 Welding
   8.1 Qualifications
   8.2 Impact testing
   8.3 Hardness testing
9 Quality control
   9.1 General
   9.2 Measuring and test equipment
   9.3 Qualification of inspection and test personnel
   9.4 NDE
   9.5 NDE of repair welding
10 Testing
   10.1 General
   10.2 Hydrostatic shell test
   10.3 Operational/functional test
   10.4 Hydrostatic seat test
   10.5 Cavity relief test
   10.6 Pneumatic seat test
11 Marking
12 Storage and shipping
   12.1 Painting
   12.2 Corrosion prevention
   12.3 Protection
13 Documentation
Annex A (informative) Purchasing guidelines
Annex B (informative) Summary of information to be
        provided by manufacturer and/or purchaser
Annex C (normative) Supplementary test requirements
Annex D (normative) Supplementary documentation
        requirements
Annex E (normative) NDE requirements
Bibliography

Defines requirements and gives recommendations for the design, manufacturing, testing and documentation of ball, check, gate and plug valves for subsea application in offshore pipeline systems meeting the requirements of ISO 13623 for the petroleum and natural gas industries.