This standard specifies the terms and definitions, classification and types, structure, materials and connection, requirements, test methods, marking and warning label, inspection rules, packaging, transportation and storage of electro-magnetic emergency shut-off valve for gas (hereinafter referred to as valve).
This standard is applicable to electro-magnetic emergency shut-off valve for gas whose nominal dimension is not larger than DN 300, maximum operating pressure not larger than 0.4 MPa and working ambient temperature scope is - 20℃~60℃, and which is linked with urban gas safety control system.
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Classification and Model
5 Structures, Materials and Connection
6 Requirements
7 Test Methods
8 Marking and User Warning Label
9 Inspection Rules
10 Packaging, Transportation and Storage
Appendix A (Normative) Stored Closing Energy Module
Appendix B (Normative) Air Tightness Test - Pressure Differential Method
Appendix C (Normative) Conversion of Pressure Difference to Leakage Amount
Appendix D (Informative) Valve Input/Output Relationship
Bibliography
