ДСТУ EN ISO 16827:2015 Неруйнівний контроль. Ультразвуковий контроль. Визначення характеристик і розмірів несуцільностей (EN ISO 16827:2014, IDT; ISO 16827:2012, IDT)

ПІДТВЕРДЖУВАЛЬНЕ ПОВІДОМЛЕННЯ

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Наказ від 24.02.2016 № 52

EN ISO 16827:2014

Non-destructive testing – Ultrasonic testing –
Characterization and sizing of discontinuities
(ISO 16827:2012)

прийнято як національний стандарт
 методом «підтвердження» за позначенням
 

ДСТУ EN 16827:2015
(EN ISO 16827:2014, IDT; ISO 16827:2012, IDT)

Неруйнівний контроль. Ультразвуковий контроль.
Визначення характеристик і розмірів несуцільностей

З наданням чинності від 2016–01–01

Contents

Foreword

Introduction

1 Scope

2 Normative references

3 Principles of characterization of discontinuities

3.1 General

3.2 Requirements for surface condition

4 Pulse echo techniques

4.1 General

4.2 Location of discontinuity

4.3 Orientation of discontinuity

4.4 Assessment of multiple indications

4.5 Shape of discontinuity

4.5.1 Simple classification

4.5.2 Detailed classification of shape

4.6 Maximum echo height of indication

4.7 Size of discontinuity

4.7.1 General

4.7.2 Maximum echo height techniques

4.7.3 Probe movement sizing techniques

4.7.4 Selection of sizing techniques

4.7.5 Sizing techniques with focussing ultrasonic probes

4.7.6 Use of mathematical algorithms for sizingм

4.7.7 Special sizing techniques

5 Transmission technique

5.1 General

5.2 Location of discontinuity

5.3 Evaluation of multiple discontinuities

5.4 Reduction of signal amplitude

5.5 Sizing of discontinuity

Annex A (normative) Analysis of multiple indications

A.1 Lateral characterisation

A.2 Transverse (Through-thickness) characterisation

A.3 Shadow technique

Annex B (normative) Techniques for the classification of discontinuity shape

B.1 Simple classification

B.1.1 General

B.1.2 Reconstruction technique

B.1.3 Echo envelope technique

B.2 Detailed classification

B.2.1 General

B.2.2 Echodynamic pattern technique

B.2.3 Directional reflectivity

B.3 Combination of data

Annex C (informative) Maximum echo height sizing technique

C.1 Distance-gain-size (DGS) technique

C.1.1 Principle

C.1.2 Applications and limitations

C.2 Distance-amplitude-correction (DAC) curve technique

C.2.1 Principle

C.2.2 Applications and limitations

Annex D (normative) Probe movement sizing techniques

D.1 Fixed amplitude level techniques

D.1.1 Principle

D.1.2 Application and limitations

D.2 6 dB drop from maximum technique

D.2.1 Principle

D.2.2 Application and limitations

D.3 12 dB or 20 dB drop from maximum technique

D.3.1 Principle

D.3.2 Application and limitations

D.4 Drop to noise level technique

D.4.1 Principle

D.4.2 Application and limitations

D.5 6 dB drop tip location technique

D.5.1 Principle

D.5.2 Application and limitations

D.6 Beam axis tip location technique

D.6.1 Principle

D.6.2 Application and limitations

D.7 20 dB drop tip location technique

D.7.1 Principle

D.7.2 Application and limitations

Annex E (normative) Iterative sizing technique

E.1 Scope

E.2 Normal incidence testing

E.2.1 Principle

E.2.2 Adjustment of gain

E.2.3 Procedure

E.3 Oblique incidence testing

Annex F (normative) Mathematical algorithms for the estimation of the actual size of a discontinuity

F.1 Large planar discontinuities

F.2 Small planar discontinuities

F.3 Planar discontinuities in a cylindrical test object

Annex G (informative) Examples of special sizing techniques

G.1 Tip diffraction techniques

G.2 Synthetic aperture focussing technique (SAFT)