ДСТУ EN 14730-1:2022 Залізниці. Колія. Алюмотермічне зварювання рейок. Частина 1. Затвердження процесів зварювання (EN 14730-1:2017, IDT)

ДСТУ EN 14730-1:2022
(EN 14730-1:2017, IDT)

Залізниці. Колія. Алюмотермічне зварювання рейок.
Частина 1. Затвердження процесів зварювання

 
   
 
 
     
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 Information to be supplied by the railway authority

5 Approval procedure

5.1 General

5.2 Process identification

5.3 General requirements

5.4 Documents to be submitted with the request for approval

5.4.1 The process manual

5.4.2 Drawing with the required measurements

5.4.3 Chemical analysis ranges and tolerances

5.5 Initial compliance testing

5.6 Extension of initial compliance testing

5.7 Preparation and allocation of test welds

6 Re-approval following process changes

6.1 Changes requiring approval

6.1.1 Geometric parameters

6.1.2 Crucible system

6.1.3 Tapping system

6.1.4 Pre-heating system

6.1.5 Portion

6.1.6 Welding gap

6.2 Test requirements for re-approval following process changes

7 Laboratory tests

7.1 Visual surface examination

7.1.1 As-cast weld surface

7.1.2 Ground weld surface

7.1.3 Visible heat affected zone

7.2 Running surface hardness test

7.3 Slow bend test

7.4 Internal examination

7.4.1 Weld soundness

7.4.2 Fusion zone - Shape and dimension

7.4.3 Fusion zone

7.4.4 Heat softened zone width

7.5 Fatigue test

7.6 Chemical analysis

Annex A (informative) Steps in approval

Annex B (informative) Suggested sequence of laboratory test

Annex C (normative) Procedure for Fry etching

Annex D (informative) Procedure for measurement of surface hardness

Annex E (normative) Procedure for slow bend test

Annex F (normative) Procedure for recording test weld fracture face defects

Annex G (normative) Ultrasonic inspection procedure on aluminothermic welds to be sectioned

G.1 General

G.2 Test equipment

G.3 Preparation of samples

G.4 Adjustment

G.5 Testing

G.6 Reporting

Annex H (normative) Procedure for microscopic examination of the visible heat affected zone and fusion zone of welds

Annex I (normative) Procedure for measurement of the heat softened zone width

I.1 Measurement of hardness

I.2 Evaluation of hardness data

I.2.1 General

I.2.2 Mean hardness of parent rail

I.2.3 Measurement hardness line

I.2.4 Heat softened zone width measurement

I.2.5 Parent rail hardness variation

Annex J (normative) Fatigue test methods for aluminothermic welds

J.1 General

J.2 Test equipment

J.3 Calibration procedure

J.4 Fatigue test results

J.4.1 General

J.4.2 Staircase testing method

J.4.3 Example of the data analysis of a fatigue strength determination by the staircase method

J.4.4 Past-the-post testing method

Annex K (informative) A-deviations

Bibliography