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 1: Visual Testing;
- Part 8: Leak Testing;
- Part 9: 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 4 of NB/T 47013: Magnetic Particle Testing.
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1 Scope
1.1 This Part of NB/T 47013 specifies the magnetic particle testing method and quality grading requirements of weld and raw materials as well as machining components of pressure equipment.
1.2 This Part is applicable to the testing of surface and near surface flaws of plates, composite plates, pipes and pipe fittings as well as butt joints, T-shaped welded joints and fillet joints manufactured from ferromagnetic materials but is not applicable to the testing of non-ferromagnetic materials.
1.3 For the support members and structural members related to pressure equipments, magnetic particle testing may also be carried out by reference to this Part.
2 Normative References
The following documents for the application of this document are essential. Any dated reference, just dated edition applies to this document. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 5097 Non-destructive Testing - Penetrant Testing and Magnetic Particle Testing - Viewing Conditions
GB 11533 Standard for Logarithmic Visual Acuity Charts
GB/T 12604.5 Non-destructive Testing - Terminology - Terms Used in Magnetic Particle Testing
GB/T 23906 Non-destructive Testing - Rings for Magnetic Particle Testing
GB/T 23907 Non-destructive Testing - Shims for Magnetic Particle Testing
JB/T 6063 Non-destructive Testing - Materials for Magnetic Particle Testing
JB/T 8290 Non-destructive Testing Instruments - Magnetic Particle Flaw Detectors
NB/T 47013.1 Nondestructive Testing of Pressure Equipments - Part 1: General Requirements
3 Terminologies and Definitions
For purpose of this part, the terminologies and definitions specified in GB/T 12604.5 and NB/T 47013.1 as well as the followings apply.
3.1 Relevant indication
The magnetic particle indication formed due to the adsorption of magnetic particles by leakage magnetic field generated by flaw during magnetic particle testing. Generally, it's also known as flaw indication.
3.2 Non-relevant indication
The magnetic particle indication formed due to the adsorption of magnetic particles by leakage magnetic field generated by section variation or magnetic permeability change of material during magnetic particle testing.
Foreword I
1 Scope
2 Normative References
3 Terminologies and Definitions
4 General Requirements
5 Testing Methods
6 Classification, Observation and Recording of Magnetic Particle Indication
7 Retesting
8 Demagnetization
9 Quality Grading
10 Magnetic Particle Testing of Pressure Equipment In-service
11 Testing Record and Report
Appendix A (Informative) Various Waveforms of Magnetizing Current, Ammeter Indication and Conversion Relation
Appendix B (Informative) Typical Magnetization Method of Various Welded Joints
