ДСТУ EN 1487:2022 Строительные клапаны. Гидравлические группы безопасности. Испытания и требования (EN 1487:2014, IDT)



ДСТУ EN 1487:2022
(EN 1487:2014, IDT)

Будівельні клапани. Гідравлічні групи безпечності. Випробування та вимоги

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

Contents

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 Test

4.3.2 Test method (Procedure)

4.3.3 Requirements

4.4 Outside visible surfaces

4.4.1 Surfaces without coatings

4.4.2 Surfaces with coatings

4.5 Corrosion resistance

4.5.1 Test method

4.5.2 Requirements

4.6 Coating adherence

4.6.1 Test method

4.6.2 Requirements

4.7 Compatibility with the products used for disinfection of the networks

4.7.1 General

4.7.2 Test method

4.7.3 Requirements

5 Design and dimensional requirements

5.1 General guidance

5.2 Dimensional characteristics

5.2.1 End connections

5.3 Test port

5.4 Pressure tapping

5.5 Hydraulic safety valve outlet connection to air break to drain

5.6 Hydraulic safety valve discharge connection to drain device

5.7 Exclusions

5.8 Replacing of the safety valve

5.9 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 Hydraulic safety group tightness test

8 Mechanical tests and requirements

8.1 Mechanical strength

8.1.1 Pressure test of the body of the hydraulic safety group

8.1.2 Bending test of the body and pull out test of the drainage of the hydraulic safety group

8.1.3 Torsional strength of the hydraulic safety group’s body

8.1.4 Tensile strength of the captive rotating nuts

8.2 Mechanical strength of the easing gear of the pressure safety valve

8.2.1 Procedure

8.2.2 Requirement

9 Tests and requirements of the components of the hydraulic safety group

9.1 Isolating valve

9.1.1 General

9.1.2 Test of manual operation

9.1.3 Endurance test

9.1.4 Test for manual operation

9.2 Check valve

9.2.1 Verification of the leaktightness between the group’s body and the check valve at low pressure

9.2.2 Verification of the leaktightness between the group’s body and the check valve under high pressure

9.3 Pressure safety valve

9.3.1 Pressures

9.3.2 Cold water pressure tests

9.3.3 Steam test

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 Manual drainage device

9.6.1 General

9.6.2 Flow rate test

9.7 Air break to drain

10 Resistance to thermal shocks

10.1 Test method

10.2 Requirement

11 Acoustic tests and requirements

12 Classification

13 Designation

14 Marking

15 Technical documents and presentation at delivery

Annex A (informative) Test sequences