BS EN 1171 , استاندارد شیرآلات دروازه ای چدنی

BS EN 1171 : Industrial valves — Cast iron gate valves

دانلود استاندارد BS EN 1171 (آخرین ویرایش استاندارد مشخصات فنی ولوهای چدنی کست آیرون، از نوع گیت ولو یا شیر دروازه ای)

فهرست استاندارد EN 1171 (2015) :

1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
4.1 Design
4.1.1 Materials
4.1.2 Pressure/temperature ratings
4.1.3 Dimensions
4.1.4 Operation
4.2 Functional characteristics
4.2.1 Shell design strength
4.2.2 Flow characteristics
4.2.3 Seat tightness
4.2.4 Sizing the operating element
4.3 Strength torque
5 Test procedures
6 Declaration of compliance
7 Designation
8 Marking, preparation for storage and transportation
8.1 Marking
8.2 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