ДСТУ EN 331:2022 Кульові крани з ручним керуванням і конічні пробкові крани з закритим дном для газових установок будівель (EN 331:2015, IDT)

ДСТУ EN 331:2022
(EN 331:2015, IDT)

Кульові крани з ручним керуванням і конічні пробкові крани з закритим дном для газових установок будівель

 
   
 
 
     
Не є офіційним виданням.
Офіційне видання розповсюджує національний орган стандартизації
(ДП «УкрНДНЦ» http://uas.gov.ua)

Contents

European foreword

1 Scope

2 Normative references

3 Terms, definitions, symbols, units and abbreviated terms

4 Product characteristics

4.1 Reaction to fire

4.2 Dimensions and tolerance

4.2.1 Materials

4.2.2 Construction

4.2.3 Product appearance

4.2.4 Valve maintenance

4.2.5 Springs

4.2.6 Wall thickness

4.2.7 Plug valves

4.2.8 Angular seal

4.2.9 Seals

4.2.10 Operation

4.2.11 Stops

4.2.12 Joints

4.3 Classification of relevant characteristics

4.3.1 Pressure classes

4.3.2 Temperature classes

4.3.3 High temperature resistance classes

4.4 Tightness (gas): leak tightness

4.5 Effectiveness: rated flow rate

4.6 Resistance to high temperature

4.7 Mechanical strength for gas networks

4.7.1 Operating torque

4.7.2 Torque and bending mechanical strength

4.8 Safeguard against overloading of the handle - Stop resistance

4.9 Release of dangerous substances

4.10 Performance requirements

4.10.1 General

4.10.2 Durability

5 Testing, assessment and sampling methods

5.1 General

5.1.1 Test conditions

5.1.2 Test sequence

5.2 Internal pressure and leak-tightness

5.2.1 General

5.2.2 Pressure test values

5.2.3 Closure parts, external leak-tightness

5.2.4 Internal leak-tightness

5.3 Rated flow rate

5.3.1 Apparatus

5.3.2 Procedure

5.4 Operating torque

5.5 Torque and bending mechanical strength

5.5.1 General

5.5.2 Sequence of torsion and bending moment tests for valves

5.6 Durability

5.6.1 Endurance test

5.6.2 Resistance to low temperature

5.6.3 Salt spray resistance

5.7 Angular seal

5.8 Safeguard against overloading of the handle – Stop resistance

6 Assessment and verification of constancy of performance - AVCP

6.1 General

6.2 Type testing

6.2.1 General

6.2.2 Test samples, testing and compliance criteria

6.2.3 Test reports

6.2.4 Shared other party results

6.3 Factory production control (FPC)

6.3.1 General

6.3.2 Requirements

6.3.3 Product specific requirements

6.3.4 Initial inspection of factory and FPC

6.3.5 Continuous surveillance of FPC

6.3.6 Procedure for modifications

7 Marking, labelling, instructions and packaging

7.1 Marking and labelling

7.2 Instructions for installation and operation

7.3 Packaging

Annex A (normative) Resistance to high temperatures for valves classes B and C

A.1 General

A.2 Procedure (external leakage)

A.2.1 Test criteria

A.2.2 Test method

A.2.2.1 Apparatus

A.2.2.2 Test procedure

Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU Construction Products Regulation

ZA.1 Scope and relevant characteristics

ZA.2 Procedure for AVCP of manually operated ball valves and closed bottom taper plug valves for gas installations for buildings

ZA.3 CE marking and labelling

Bibliography