EN 1171:2015

European foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
5 Test procedures
6 Declaration of compliance
7 Designation
8 Marking, preparation for storage and transportation
Annex A (informative) - Information to be supplied by
        the customer
Annex B (normative) - Strength torque test
Annex C (normative) - Equivalence between EN and
        ISO cast iron material grades
Annex ZA (informative) - Relationship between this
         European Standard and the Essential
         Requirements of EU Directive 97/23/EC
Bibliography

This European Standard specifies the requirements for cast iron gate valves with flanged ends, socket ends or spigot ends.This standard is applicable to cast iron gate valves mainly used for industrial and general-purpose applications. However, they can be used for other applications provided the requirements of the relevant performance standards are met.The range of nominal sizes covered is:DN 40 ; DN 50 ; DN 65 ; DN 80 ; DN 100 ; DN 125 ; DN 150 ; DN 200 ; DN 250 ; DN 300 ; DN 350 ; DN 400 ; DN 450 ; DN 500 ; DN 600 ; DN 700 ; DN 800 ; DN 900 ; DN 1 000.The range of pressure designations covered is:-isobaric PN 6; PN 10; PN 16; PN 25;-isomorphic, PS 10 bar to PS 1 bar at room temperature.