1.0.1 This standard is applicable to inspection and measurement of ray photographing for metal melting weld seam of building installation and overhaul engineering.
1.0.2 Requirements of relevant national standard and professional standard shall also be complied while implementing this Standard.
1.0.3 Where the adoption of this Standard is agreed in the technical document or the contract by confirmation, all requirements of this Standard shall be complied. If part of the requirements hereof is applied in only inspection and measurement of ray photographing, it shall not be deemed to be complying with this Standard.
1 General Provisions
2 General Requirements
2.1 Conditions of the ray photographing inspection organization
2.2 Conditions of staffs for inspection and measurement of ray photographing
2.3 Working procedure of ray photographing inspection
2.4 Quantity of welding seams required with ray photographing inspection
2.5 Weld position applied with partial ray photographing inspection
2.6 Conditions of welding seam required with ray photographing inspection
3 Photographing Process
3.1 Selection of radiation source energy
3.2 Quality grade of radiography
3.3 Classification and selection of film
3.4 Intensifying screen
3.5 Image quality indicator (progress indicator)
3.6 Symbols and code letters for marking
3.7 Exposure curve
3.8 Radiography mode
3.9 Geometric conditions
3.10 Locating position and quantity of image quality indicator
3.11 Placement of locating marks and identifying marks
3.12 Cassette and its placement
3.13 Shielding of useless rays and scattered rays
3.14 Photographing operation
4 Darkroom Processing of Film, Observation of Negative Film and Quality Grading of Weld Seam
4.1 Darkroom processing of film
4.2 Quality of photographic plate
4.3 Observation of negative film
4.4 Evaluation for the weld seam quality of photo negative film
4.5 Quality grading of steel melting weld seam
4.6 Quality grading of steel pipe melting butt joint seam
5 Inspection Report, Processing of Controversial Negative Film, Random Inspection of Inspecting Work
5.1 Inspection report
5.2 Processing of unqualified negative film
5.3 Processing of controversial negative films
5.4 Random inspection of ray photographing inspecting work
6 Ray Photographing Protection on Construction Site
Appendix A Radiography Thickness of Melt Welded Butt Joint
Appendix B Calculation of Effective Focal Point Dimension
Appendix C Quality Grading of Aluminium Melting Weld Seam
Appendix D Quality Grading of Titanium Melting Weld Seam
Appendix E Treatment Methods for Extendable Evaluation Area
Additional Explanation
