Tiêu chuẩn iso 01106 3 1984 scan

International Standard (@ 110613 0 1 4 4!!!! INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEXAYHAPOAliAR OPrAHH3AUMR ilO CTAH,lAPTH3AWlH~RGANlSATlON INTERNATIONALE DE NOAMALISATION Recommended pract[.]

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International Standard (@ 0 1 4 4!!!! 110613

INTERNATIONAL ORGANIZATION FOR STANDARDIZATION-MEXAYHAPOAliAR OPrAHH3AUMR ilO CTAH,lAPTH3AWlH~RGANlSATlON INTERNATIONALE DE NOAMALISATION

of up to 50 mm wall thickness

First edition - 1984-12-15

i3

i

UDC 621.791.053 : 778.33 Ref No IS0 1106/3-1984(E)

7 Descriptors : welding, steel tubes, welded joints, radiographic analysis

Price based on 14 pages

03:06:34 MDT Questions or comments about this message: please call the Document

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``,,``,`,````,``,,,,``````,,,-`-`,,`,,`,`,,` -Foreword

Printed in Switzerland

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INTERNATIONAL STANDARD IS0 1106/3-1984(E)

of up to 50 mm wall thickness

0 Introduction

radiographs

1 Scope

subject

2 Field of application

wall thickness

used

NOTES

IS0 1106 should be understood to cover other cylindrical bodies, such

as tubes, penstocks, boiler drums and pressure vessels

2 The IQI values to be accepted for the different types of welded

if the techniques described are used correctly, it should be possible to

requirements

However, for double wall techniques (see 7.1.1.3 and 7.1.1.4; 7.1.2.3 and 7.1.2.4), the steel thickness indicated in IS0 2504 refers to the double wall thickness

3 References

rules 2)

1) At present at the stage of draft (Revision of Appendix-1969 to ISO/R 947, ISO/R 1027 and ISO/R 1106.)

2) At present at the stage of draft

1

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4 Definitions appear in the radiograph to ensure unequivocal identification of

the section

IS0 6676 apply

5 Classification of radiographic techniques

require longer exposures

6 General

6.1 Protection against ionizing radiations

6.2 Surface preparation

6.3 Location of the weld in the radiograph

should be placed on each side of the weld, so that its position

6.4 Identification of radiographs

6.5 Marking

6.6 Overlap of films

films, the separate films should overlap by at least 10 mm to en-

6.7 Image quality indicator

should be placed on the surface facing the source of radiation,

on the film side If this has to be done, a lead letter “F” should

~~~~1;YEIJi.+.~.~,;~~j.~~~~drndfirO~~~~~~ID.j-~-

IQI, see IS0 1027

pear on each length of film

7 Recommended techniques for making radiographs

7.1 Setting-up of the films and of the source of

radiation

2

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``,,``,`,````,``,,,,``````,,,-`-`,,`,,`,`,,` -IS0 1106/3-1984(E)

weld centre

diameter

and 3)

weld centre

the centre of the plane of the weld

single image (see figure 5)

100 mm

NOTE - Whenever possible, in particular when a large part of the

way that the axis of the X-ray tube is parallel to the pipe to be

tremities of the film, and a more uniform distribution of the intensity of the radiation

single image (see figure 5)

The films (see IS0 5579 and IS0 7004) to be used for class A

least fine-grain

tion of weld under examination

posure times

tered radiation

3

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7.3 Cassettes

X-ray absorption

7.4 Alignment of beam

exceptions

tion

7.5 Interception of unwanted and scattered

radiation

NOTE - In particular cases, for example double-wall, single-image with cobalt-60 y-rays, a filter of 2 mm thickness of lead may be used between the specimen and the film This filter can be external or inside the cassette Where intensifying screens of metal other than lead are used, this filter can be replaced by a thicker front intensifying screen, if this is more convenient

7.6 Source-to-film distance

specimen distance, d (i.e the distance between the radiation source and the surface of the specimen facing the X-ray tube or

For class A

dlf = 7,5 t 213

For class B

dlf = 15 t 213

1) This projected image can be produced for example accordrng to IISIIIWI 16365, Recommendation for the determination of the focalspotsize of X-ray tubes

4

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``,,``,`,````,``,,,,``````,,,-`-`,,`,,`,`,,` -IS01105/31984(E)

greater than 50 %

7.9 X-ray tube voltage and type y-ray source

of defect sensitivity

the limits given in table 2

7.7 Size of the area examined

7.8 Density of radiograph

table 1

Table 1 - Density of radiographs

Table 2 - Minimum thickness for y-rays

Class

Thickness, mm

pected to be small

A

0

1.7 or more”

2,0 or more

1) May be reduced to 1.5 by special agreement between the contract-

ing parties

should not exceed 0,3

7.10 Processing

7.11 Viewing

5

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8 Test report

used;

focus and of the film (sketch);

the inspector

6

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``,,``,`,````,``,,,,``````,,,-`-`,,`,,`,`,,` -ISO1106/3-1984(E)

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9

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10

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IS0 1106/3-1984 (El

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L-4 Figure 11 - Determination of effective focal spot size from projected focal spot images of various shapes (effective width of focal spot, f = (a + b)/2) 11 COPYRIGHT 2003; International Organization for Standardization Document provided by IHS Licensee=eni spa/5928701002, User=, 08/13/2003 03:06:34 MDT Questions or comments about this message: please call the Document

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``,,``,`,````,``,,,,``````,,,-`-`,,`,,`,`,,` -IS0 1106/3-1984 (El

1000

7

5 ';

2

Thickness, t, mm )

d = Distance between the source of radiation and the surface of the specimen facing the source of radiation

f = Effective size of the source of radiation

t = Specimen thickness in the direction of the radiation beam

12

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l-

0,5-

Distance between the source of radiation and the surface of the specimen

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= 1000~

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30

20

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=

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1200

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- z- 100

= 80

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6

5

4

3

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1000

400

200

>

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[ 100

ii

50

30

/

LA-

10 20 30 50

Thickness, mm

Tiêu đề	Recommended Practice for Radiographic Examination Fusion Welded Joints Part 3 : Fusion Welded Circumferential Joints in Steel of Up to 50 mm Wall Thickness
Trường học	International Organization for Standardization
Chuyên ngành	Welding and allied processes
Thể loại	Standard
Năm xuất bản	1984
Thành phố	Switzerland

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Số trang	16
Dung lượng	817,75 KB