I.S. EN 14382:2005

Foreword
1 Scope
2 Normative references
3 Terms, definitions and symbols
4 Construction requirements
  4.1 Basic requirements
  4.2 Materials
  4.3 Strength of housings
5 Functional requirements
  5.1 General
  5.2 Shell strength, external tightness and internal sealing
  5.3 Accuracy group
  5.4 Response time
  5.5 Relatching difference and unlatching
  5.6 Closing force
  5.7 Endurance and accelerated ageing
  5.8 Strength of the trip mechanism, valve seat and closing
       member against the dynamic impact of flowing gas
  5.9 Flow coefficient
  5.10 Final visual inspection
6 Testing
  6.1 General
  6.2 Tests
  6.3 Type test
  6.4 Selection of test samples
  6.5 Routine tests
  6.6 Production surveillance
7 Test and verification methods
  7.1 Dimensional check and visual inspection
  7.2 Materials check
  7.3 Verification of the strength of pressure containing
       parts and inner metallic partition walls
  7.4 Verification of the strength of parts transmitting
       actuating forces
  7.5 Shell and inner metallic partition walls strength test
  7.6 Alternative shell and inner metallic walls strength test
  7.7 External tightness test
  7.8 Internal sealing test
  7.9 Accuracy group
  7.10 Response time
  7.11 Relatching difference and unlatching
  7.12 Closing force
  7.13 Endurance and accelerated ageing
  7.14 Resistance to gas of non metallic parts
  7.15 Verification of the strength of the trip mechanism,
       valve seat and closing member against dynamic impact
       of flowing gas
  7.16 Final visual inspection
8 Documentation
  8.1 Documentation related to type test
  8.2 Documentation for the customer
  8.3 Documentation related to production surveillance
       in accordance with 6.6
9 Marking
  9.1 General requirements
  9.2 Marking of connections for sensing, exhaust and
       breather lines
  9.3 Identification of auxiliary devices
Annex A (informative) Ice formation
  A.1 General
  A.2 Requirements
  A.3 Tests
Annex B (informative) Compliance evaluation
  B.1 General
  B.2 Introduction
  B.3 Procedure
  B.4 Manufacturer's compliance evaluation
  B.5 Issue of the certificate of compliance
Annex C (informative) Pressure drop and flow coefficient
  C.1 Calculation method for pressure drop throughout the SSD
  C.2 Test method for the determination of the flow coefficient
      C[v]
Annex D (informative) Alternative test method for verification
        of the strength of the trip mechanism, valve seat and
        closing member
  D.1 Test method
  D.2 Test method for the determination of the dynamic factor
      C[r]
  D.3 Test method for a series of SSDs
Annex E (informative) Sizing equation
Annex F (informative) Inspection certificate
Annex G (informative) Order specification
  G.1 General
  G.2 Minimum specifications
  G.3 Optional specifications
Annex H (informative) Acceptance test
Annex I (informative) Seat leakage (alternative requirement)
Annex J (normative) Materials
  J.1 Steel materials for pressure containing parts and
      inner metallic partition walls
  J.2 Metallic materials different from steel materials
      for pressure containing parts and inner metallic
      partition walls
  J.3 Materials for fixtures, integral process and sensing
      lines, connectors and fasteners
Annex K (informative) Suitability of safety shut-off device
        for damp operating conditions
Annex L (informative) Glossary
Annex ZA (informative) Relationship between this European Standard
         and the Essential Requirements of EU Directive 97/23/EC
Bibliography

Describes constructional, functional, testing and marking requirements, sizing and documentation of gas safety shut-off devices used in the pressure regulating stations in accordance with EN 12186 or EN 12279 a) for inlet pressures up to 100 bar and nominal diameters up to DN 400; b) for an operating temperature range from -20 Degree C to +60 Degree C, which operate with fuel gases of the 1st and 2nd family in accordance with EN 437 in transmission and distribution networks and also in commercial and industrial installations.