1 Scope
This standard specifies the personnel, equipment and apparatus requirements, methods and weld quality classification, etc. of ship steel weld ultrasonic testing.
This standard is applicable to Type A pulse reflection manual contact ultrasonic testing for full penetration weld of ferritic steel whose base metal thickness is 8 mm ~ 150 mm.
The thin plate whose base metal thickness is 6 mm~<8 mm may be tested by reference to this standard.
This standard is not applicable to cast steel and austenitic stainless steel welds, drum longitudinal weld whose outside diameter is less than 250 mm and whose inside and outside diameter ratio is less than 0.7, drum girth weld whose outside diameter is less than 200 mm and curved intersecting welds of various dimensions.
2 Normative References
The following documents for the application of this document are essential. For dated reference, just dated edition applies to this document. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 12604.1 Terminology for Nondestructive Testing - Ultrasonic
GB/T 19799.1-2005 Non-destructive Testing-Ultrasonic Testing-Calibration Block No.1
JB/T 9214 Practice for Evaluating Performance Characteristics of A Scope Ultrasonic Pulse - Echo Testing Systems
JB/T 10061 Commonly Used Specification for A-mode Ultrasonic Flaw Detector Using Pulse Echo Technique
JB/T 10062 Testing Methods for Performance of Probes Used in Ultrasonic Flaw Detection
China Classification Society "Non-destructive Testing - Qualification and Certification of Personnel" (2008)
3 Terminologies and Definitions
For the purposes of this standard, the terminologies and definitions defined in GB/T 12604.1 apply.
Foreword I
1 Scope
2 Normative References
3 Terminologies and Definitions
4 Personnel Requirements
5 Equipment and Apparatus Requirements
6 Test Block and Couplant
7 Technical Class of Testing
8 Testing Technology Documents
9 Pre-testing Preparation
10 Selection of Detection Frequency and Angle Probe Refraction Angle
11 Drum Longitudinal Weld Testing
12 Base Metal Testing
13 Baseline Adjustment
14 Distance - amplitude Curve (DAC Curve)
15 Compensation
16 Probe Scanning Mode
17 Testing
18 Calibration and Reinspection
19 Weld Quality Classification
20 Repair and Reinspection of Unqualified Weld
21 Report and Record
Appendix A (Normative) Reference Block
Appendix B (Normative) Drum Longitudinal Weld Testing
Appendix C (Normative) DAC Curve Plotting
Appendix D (Normative) Normal Probe Testing for T-shaped Fillet Weld
Appendix E (Normative) Determination of Transmission Compensation
