ДСТУ EN 1488:2022 Будівельна арматура. Групи розширення. Випробування та вимоги (EN 1488:2021, IDT)

ДСТУ EN 1488:2022
(EN 1488:2021, IDT)

Будівельна арматура. Групи розширення. Випробування та вимоги

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

Contents

European foreword

Introduction

1 Scope

2 Normative references

3 Terms and definitions

4 Materials and surface finishes

4.1 General

4.2 Materials

4.3 Detection of residual stress

4.3.1 General

4.3.2 Test

4.3.3 Test method (Procedure)

4.3.4 Requirements

4.4 Corrosion resistance test

4.4.1 General

4.4.2 Test method

4.4.3 Requirements

4.5 Coating adherence test

4.5.1 General

4.5.2 Test method

4.5.3 Requirements

4.6 Compatibility with the products used for shock disinfection of the networks

4.6.1 General

4.6.2 Test method

4.6.3 Requirements

5 Design and dimensional requirements

5.1 General guidance

5.2 Dimensional characteristics

5.3 Test port and pressure measuring port

5.4 Expansion valve outlet connection to air break to drain

5.5 Expansion valve discharge connection to drain device

5.6 Connections

5.7 Replacing of the expansion valve

5.8 Check valve

6 Apparatus

6.1 General

6.2 Tolerances of parameters and accuracy of measure instruments

6.2.1 Tolerances on set parameters

6.2.2 Accuracy of measuring instruments

6.2.3 Test media

7 Hydraulic tests and requirements

7.1 Flow rate test

7.1.1 Procedure

7.1.2 Requirement

7.2 Tightness test

7.2.1 General

7.2.2 Tightness test for the isolating valve at a pressure of 1,6 MPa (16 bar)

7.2.3 Expansion group tightness test

8 Mechanical tests and requirements

8.1 Mechanical strength

8.1.1 Pressure test of the body of the expansion group

8.1.2 Bending moment test

8.2 Mechanical strength of the easing gear of the expansion valve

8.2.1 Procedure

8.2.2 Requirement

8.3 Torsional strength of the expansion group's body

8.3.1 General

8.3.2 Procedure

8.3.3 Requirement

8.4 Torque test of the captive rotating nuts/tail pieces

8.4.1 General

8.4.2 Procedure

8.4.3 Requirement

9 Tests and requirements of the components of the expansion group

9.1 Isolating valve

9.1.1 General

9.1.2 General requirements

9.1.3 Test of manual operation

9.1.4 Endurance test

9.2 Tightness between check valve and group's body

9.2.1 General

9.2.2 Verification of the leak tightness between the group’s body and the check valve at low pressure

9.2.3 Verification of the leak tightness between the group's body and the check valve under high pressure

9.3 Expansion valve

9.3.1 Pressures

9.3.2 Cold water pressure tests

9.4 Endurance test

9.4.1 Procedure

9.4.2 Requirement

9.5 Easing gear (manual control device)

9.5.1 Operation of the easing gear

9.5.2 Easing gear endurance test

9.6 Air break to drain

10 Acoustic tests and requirements

11 Classification

12 Designation

13 Marking

14 Technical documents and presentation at delivery

Annex A (informative) Classification of water heaters according to heating method

Bibliography