ДСТУ EN 10253-2:2022 Фитинги для стыковой сварки. Часть 2. Нелегированные и ферритные легированные стали с требованиями особого контроля (EN 10253-2:2021, IDT)

ДСТУ EN 10253-2:2022
(EN 10253-2:2021, IDT)

Фітинги для стикового зварювання. Частина 2. Нелеговані та феритні
леговані сталі з вимогами особливого контролювання

 
   
 
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 Symbols and abbreviations

5 Classification and designation

5.1 Classification of grades

5.2 Designation of steel grades

5.3 Designation of fittings

6 Information to be supplied by the purchaser

6.1 Mandatory information

6.2 Options

6.3 Examples of an order

7 Resistance to internal pressure

7.1 General

7.2 Fittings of type A

7.3 Fittings of type B

8 Manufacturing process

8.1 Steelmaking process

8.2 Product making process for fittings and heat treatment

9 Technical requirements

9.1 General

9.2 Chemical composition

9.3 Mechanical properties

9.4 Creep rupture strength values

9.5 Weldability

10 Appearance and internal soundness (delivery conditions)

10.1 Definitions of surface imperfections

10.2 Appearance

10.3 Internal soundness

11 Dimensions and tolerances

11.1 Dimensions

11.2 Dimensional tolerances

11.3 Performance of the end bevelling

12 Inspection

12.1 Type of inspection

12.2 Inspection documents

12.3 Summary of inspection and testing

13 Sampling

13.1 Frequency of tests

13.2 Preparation of samples and test pieces

14 Test methods

14.1 Chemical analysis

14.2 Tensile test on the base material

14.3 Transverse tensile test on the weld

14.4 Hardness test

14.5 Weld bend test

14.6 Impact testing

14.7 Dimensional testing

14.8 Visual testing (VT)

14.9 Non-destructive testing (NDT)

14.10 Positive material identification (PMI)

15 Marking

16 Protection and packaging

Annex A (normative) Dimensions

Annex B (normative) Determination of pressure factors and wall thickness

Annex C (normative) Pressure factor tables for Fittings of type A

Annex D (informative) Wall thickness tables for fittings of type B

Annex E (informative) Recommended heat treatment temperatures

Annex F (informative) Creep rupture strength values

Annex ZA (informative) Relationship between this European Standard and the Essential

Requirements of EU Directive 2014/68/EU

Bibliography