EN ISO 14723:2009

Foreword
Introduction
1 Scope
2 Conformance
   2.1 Rounding
   2.2 Compliance to standard
3 Normative references
4 Terms and definitions
5 Symbols and abbreviated terms
   5.1 Symbols
   5.2 Abbreviated terms
6 Valve types and configurations
   6.1 Valve types
   6.2 Valve configurations
7 Design
   7.1 Design codes and calculations
   7.2 Pressure and temperature ratings
   7.3 Cavity relief
   7.4 External pressure and loads
   7.5 Sizes
   7.6 Face-to-face and end-to-end dimensions
   7.7 Valve operation
   7.8 Pigging
   7.9 Valve ends
   7.10 Bypasses, drains and vents
   7.11 Manual actuator-manual operator - Handwheels and
        wrenches
   7.12 Locking devices
   7.13 Position of the obturator
   7.14 Position indicators
   7.15 Travel stops
   7.16 ROV interface
   7.17 Sealant injection
   7.18 Lifting points and supports
   7.19 Valve operator interface
   7.20 Drive trains
   7.21 Stem retention
   7.22 Stem/shaft protector
   7.23 Hydraulic lock
   7.24 Corrosion/erosion
   7.25 Hyperbaric performance
   7.26 Design documents
   7.27 Design document review
8 Materials
   8.1 Material specification
   8.2 Service compatibility
   8.3 Forged parts
   8.4 Composition limits
   8.5 Impact test requirements of steels
   8.6 Bolting
   8.7 Sour service
9 Welding
   9.1 Qualifications
   9.2 Impact testing requirements of weldments
   9.3 Hardness testing
   9.4 Repair
10 Quality control
   10.1 NDE requirements
   10.2 Measuring and test equipment
   10.3 Qualification of inspection and test personnel
   10.4 NDE
   10.5 NDE of repairs
   10.6 Visual inspection of castings
11 Testing
   11.1 General
   11.2 Hydrostatic shell test
   11.3 Operational/functional test
   11.4 Hydrostatic seat test
   11.5 Cavity-relief test
   11.6 Low-pressure-gas seat test
   11.7 Draining
   11.8 Installation of body connections after testing
12 Coating
13 Marking
14 Preparation for shipment
15 Documentation
   15.1 Documentation retained by manufacturer
   15.2 Documentation shipped with valve
Annex A (normative) - Requirements for non-destructive
        examination
Annex B (normative) - Supplementary test requirements
Annex C (informative) - Supplementary documentation
        requirements
Annex D (informative) - Purchasing guidelines
Annex E (informative) - Marking example
Bibliography

ISO 14723:2009 specifies 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.ISO 14723:2009 is not applicable to valves for pressure ratings exceeding PN 420 (Class 2500).