This Standard "Nondestructive Testing of Pressure Equipments" (NB/T 47013) comprises the following 13 parts:
- Part 1: General Requirements;
- Part 2: Radiographic Testing;
- Part 3: Ultrasonic Testing;
- Part 4: Magnetic Particle Testing;
- Part 5: Penetrant Testing;
- Part 6: Eddy Current Testing;
- Part 7: Visual Testing;
- Part 8: Leak Testing;
- Part 4: Acoustic Emission Testing;
- Part 10: Ultrasonic Time of Flight Diffraction Technique;
- Part 11: X-ray Digital Radioscopic Testing;
- Part 12: Magnetic Flux Leakage Testing;
- Part 13: Pulsed Eddy Current Testing.
This Part is Part 2 of NB/T 47013 (Radiographic Testing).
This Part was drafted according to the rules given in "Directives for Standardization - Part 1: Structure and Drafting of Standards" (GB/T 1.1-2009).
This Part supersedes "Nondestructive Testing of Pressure Equipments - Part 2: Radiographic Testing" (JB/T 4730.2-2005); compared with JB/T 4730.1-2005, this Part has the following main technical changes:
- the application scope of was expanded, X ray and γ ray detection technique and quality classification requirements for inserted tube socket fillet joint butt weld, placement tube socket fillet joint butt weld and tube-tube plate, as well as the classification of steel was cancelled;
- some normative references were modified and added;
- the content of terms and definitions of radiographic testing was added;
- the requirements for application of Tm 170 and Yb 169 sources were added;
- the system classification of industrial radiographic film was modified, film was classified into six categories: C1, C2, C3, C4, C5 and C6. The selection of film category was revised again according to the new classification criteria, and relevant requirements for measurement of film fog density were supplemented;
- the content of nigrometer to verify time was modified;
- the relevant requirements for optical density range and quantity of measuring points of standard-density films were added;
- the calculation formula of radiography times at inner eccentric penetration (F
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 General Requirements
5 Testing Process and Its Selection
6 Result Evaluation and Quality Classification of Radiographic Testing for Fusion Welded Joint in Pressure Equipment
8 Testing Records and Reports
Appendix. A (Informative)
Appednix B (Normative) Characteristic Indexes of Industrial Radiographic Film System
Appendix C (Informative) Regular Checking Method for Nigrometer (Optical Densitometer)
Appendix D (Informative) Determination of Safe Radiographic Time in Dark Room
Appendix E (Informative) Schematic Diagram of Typical Radiographic Method
Appendix F (Informative) Determination Method for Radiography Times of Circumferential Butt Weld
Appendix G (Normative) Calculation Method for Focus Size
Appendix I (Informative) Filter Plate
Appendix J (Normative) Placement Principle of Location Mark
Appendix K (Informative) Measurement Method for Thiosulfate Ion Concentration on Film
Appendix L (Normative) Type and Specification of Reference Block
