BS 2910:1986

Foreword
Committees responsible
Method
1 Scope
2 Definitions
3 Approval of personnel
4 Techniques
5 Film type
6 Gamma-ray sources
7 Protection
8 Surface condition
9 Weld image location
10 Identification of radiographs
11 Marking
12 Density of radiograph
13 Image quality indicators
13.1 Sensitivities
13.2 Location of IQI
13.3 Number of IQIs to be used
14 Intensifying screens
15 Cassettes
16 Object-film distance
17 Overlap of film
18 Useful (diagnostic) length of weld to be examined
      on each radiograph and number of films required
19 Interception of unwanted and scattered radiation
20 Processing
21 Viewing
22 Approved radiographic procedures
23 Report
24 Examination with film inside and source of
      radiation outside
24.1 Technique 1. X-rays using fine-grain direct-type
      film
24.2 Technique 3. X-rays using medium-speed direct-type
      film
24.3 Technique 4. Gamma-rays using fine-grain direct-
      type film
25 Examination with film outside and source of
      radiation inside
25.1 Technique 7. X-rays using fine-grain direct-type
      film
25.2 Technique 9. X-rays using medium-speed direct-type
      film
25.3 Technique 10. Gamma-rays using fine-grain direct-
      type film
26 Examination with film and source of radiation both
      outside
26.1 Technique 13. X-rays using fine-grain direct-type
      film
26.2 Technique 15. X-rays using medium-speed direct-
      type film
26.3 Technique 16. Gamma-rays usig fine-grain direct-
      type film
Appendices
A Explanatory information on the techniques
B Guide to choice of technique
C Alternative procedure for placement of IQI
D Example of record form for radiographic
      examination
E Flaw sensitivity in radiography: principles and
      background
Tables
1 Individual techniques
2 Minimum and maximum penetrated thickness for
      gamma-ray sources
3 IQI sensitivity values with IQIs of types I and II
      with single wall methods
4 Intensifying screens
Figures
1 Penetrated thicknesses
2 Double wall, single image method
3 Double wall, double image method
4 Minimum values of focus-to-film distances with
      X-ray source
5 Minimum values of s.f.d. with gamma-ray source
6 Minimum number of radiographs required with source
      outside, film inside to cover full circumferential
      weld
7 Minimum number of radiographs required with source
      offset inside, film outside to cover full
      circumferential weld
8 Minimum number of radiographs required with source
      and film both outside to cover full
      circumferential weld
9 Maximum X-ray tube voltage
10 Source of radiation on centreline
11 Source of radiation offset

Requirements for techniques, film type and density, gamma ray sources, protection, surface condition, identification, marking, IQIs, screens, processing and viewing. Appendices give explanatory information on techniques and guidance on their use.