NB/T 47013.9-2012 (NB/T47013.9-2012)

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NB/T 47013.9-2012: PDF in English (NBT 47013.9-2012)

ICS 77.040.20
H 26
INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
NB/T 47013.9-2012 (JB/T 4730.9)
Nondestructive Testing of Pressure Equipment
- Part 9. Acoustic Emission Testing
ISSUED ON. JANUARY 04, 2012
IMPLEMENTED ON. MARCH 01, 2012
Issued by. National Energy Administration
NB
Contents
Foreword ... I 
Introduction ...II 
1 Scope ... 1 
2 Normative References ... 1 
3 Terms and Definitions ... 2 
4 General Requirements ... 2 
5 Testing Methods ... 3 
6 Result Evaluation and Classification... 8 
7 Verification of Acoustic Emission Location Source... 10 
8 Records and Reports... 10 
Appendix A (Normative) Performance Requirements on Acoustic Emission System ... 12 
Appendix B (Informative) Schematic Diagram of Sensor Layout ... 14 
Foreword
This Part is Part 9 (Acoustic Emission Testing) of "Nondestructive Testing of Pressure
Equipment" (NB/T 47013).
In this Part, Appendix A is normative while Appendix B informative.
This Part was proposed and is under the jurisdiction of National Technical Committee on
Boilers and Pressure Vessels of Standardization Administration of China (SAC/TC 262).
Drafting organizations of this Part. China Special Equipment Inspection & Research
Institute, Northeast Petroleum University, Hefei General Machinery Research Institute,
Wuhan Boiler Pressure Vessel Inspection Institute, Shanghai Research Institute of Materials,
Beijing Soundwel Technology Co., Ltd., Beijing Crahesion Science & Trade Co., Ltd.,
Machinery Research Institute of Sinopec Tianjin Company, Aerospace Material Process
Property Testing and Failure Analysis Center, Nanjing Boiler and Pressure Vessel Inspection
Institute, Hebei Supervision and Inspection Institute of Boiler and Pressure Vessel, Pressure
Vessel Inspection and Research Institute of Boiler and Pressure Vessel of Jiangxi Province,
Anhui Huaxia High-tech Development Co., Ltd. and Hebei Jinduo Testing Technology Co.,
Ltd.
Drafting staffs of this Part. Shen Gongtian, Li Bangxian, Dai Guang, Guan Weihe, Huo
Zhen, Jin Yufei, Li Guanghai, Wu Zhanwen, Liu Shifeng, Duan Qingru, Jiang Shiliang,
Liu Zhejun, Jiang Jun, Geng HuiPo, Wang Xiaomei, Liu Weicheng, Li Huan, Yuan Haijiang.
The National Technical Committee on Boilers and Pressure Vessels of Standardization
Administration of China (SAC/TC 262) is in the charge of the interpretation of this Part.
Introduction
Since 1986, China Special Equipment Inspection & Research Institute has been
dedicated to the application of acoustic emission, a new nondestructive testing technique, to
the safety inspection of special equipment. The research team has organized more than 10
organizations to undertake the national science and technology as well as relevant support
programs as well as a series of subjects sponsored by the former Ministry of Labor and the
General Administration of Quality Supervision (AQSIQ), so as to research acoustic emission
testing and assessment techniques for special equipment (such as pressure vessel and pressure
piping) and develop relevant equipment. So far, 7 research achievements have been made,
with wholly technological breakthrough in the acoustic emission testing of pressure
equipment.
(1) From 1986 to 1989, "Research on the Application of Acoustic Emission to the
Inspection of Pressure Vessels in Use", a subject of the former Ministry of Labor;
(2) From 1992 to 1995, "Acoustic Emission Testing and Monitoring Assessment
Technique for Hazardous Defects of Pressure Vessels in Service as Well as Relevant
Equipment Development", a national major science and technology subject during the "Eighth
Five-year Plan";
(3) From 1996 to 2001, "Research on Key Techniques for the Defect Testing and
Monitoring of Pressure Piping", a national major science and technology subject during the
"Ninth Five-year Plan";
(4) From 2000 to 2002, "Development of Safety Testing Instrument for Boiler Piping" -
"Research on Multi-channel Digitalized Acoustic Emission Testing and Analysis System", a
national major science and technology subject during the "Ninth Five-year Plan";
(5) From 2001 to 2006, "Research on Key Techniques for the Online Inspection and
Monitoring of Pressure Vessels", a national major science and technology subject in the
"Eleventh Five-Year Plan";
(6) From 2006 to 2009, "Research on New Methods and Key Techniques for the Leakage
Testing of Fluid Pipe Network", a major project sponsored by national natural science fund;
(7) From 2006 to 2009, "Research on the Leakage Point Location and Testing of
Embedded Gas Piping and Relevant Equipment Development", a subject of national science
and technology support program during the "Eleventh Five-Year".
Some key technical parameters in this Part mainly refer to research achievements of the
above-mentioned projects, on-site acoustic emission testing experience of several special
pressure equipment as well as testing data analysis and acoustic emission location source
re-inspection results.
Nondestructive Testing of Pressure Equipment -
Part 9. Acoustic Emission Testing
1 Scope
This Part specifies the classification and evaluation of acoustic emission testing methods
and results for metal pressure equipment.
This Part is applicable to the acoustic emission testing and monitoring of active defects
for metal pressure equipment in use.
This Part is not applicable to the acoustic emission testing and monitoring of leakage.
2 Normative References
The following documents are indispensable for the application of this document. For
dated references, only the dated edition is applicable to this document. For undated references,
the latest edition (including all the amendments) applies.
GB/T 12604.4 Non-destructive Testing - Terminology - Terms Used in Acoustic
Emission Testing
GB/T 19800 Non-destructive Testing - Acoustic Emission Inspection - Primary
Calibration of Transducers
GB/T 19801 Non-destructive Testing - Acoustic Emission Inspection - Secondary
Calibration of Acoustic Emission Sensors
GB/T 20737 Non-destructive Testing - General Terms and Definitions
JB/T 4730.1 Nondestructive Testing of Pressure Equipment - Part 1. General
Requirements
JB/T 4730.2 Nondestructive Testing of Pressure Equipment - Part 2. Radiographic
Testing
JB/T 4730.3 Nondestructive Testing of Pressure Equipment - Part 3. Ultrasonic Testing
JB/T 4730.4 Nondestructive Testing of Pressure Equipment - Part 4. Magnetic Particle
Testing
JB/T 4730.5 Nondestructive Testing of Pressure Equipment - Part 5. Penetrant Testing
JB/T 4730.6 Nondestructive Testing of Pressure Equipment - Part 6. Eddy Current
Testing
NB/T 47013.7 Nondestructive Test of Pressure Equipment - Part 7. Visual
Examination
NB/T 47013.8 Nondestructive Test of Pressure Equipment - Part 8. Leak Testing
NB/T 47013.10 Nondestructive Testing of Pressure Equipment - Part 10. Ultrasonic
Time of Flight Diffraction Technique
3 Terms and Definitions
For the purpose of this Part, the following terms and definitions as well as those given in
GB/T 12604.4, GB/T 20737 and JB/T 4730.1 apply.
3.1
Acoustic emission source
A physical source point or position where transient elastic wave is generated due to quick
energy release from material.
3.2
Acoustic emission location source
An acoustic emission source location on the tested piece, determined through analyzing
the acoustic emission data.
Note. a few common source location methods include zone location, calculation location and continuous signal location.
3.3
Activity
A degree where the quantity of acoustic emission source events varies with loading or
time.
3.4
Intensity
An average elastic energy released from acoustic emission source events.
3.5
Active defect
A defect released from transient elastic wave which is generated due to loading.
4 General Requirements
4.1 General
The general requirements of acoustic emission testing shall not only comply with JB/T
4730.1, but also meet the requirements of Sections 4.1~4.6.
4.2 Acoustic emission testing system
The acoustic emission testing system shall consist of sensor, pre-amplifier, host machine
as well as display and storage units. The performance of the testing system shall meet the
requirements of Appendix A.
4.3 Pressure indicating device
During testing, the tested piece shall be provided with pressure indicating device. Within
the calibration validity, the maximum range of the pressure indicating device shall be between
1.5 times and 3 times the highest test pressure.
4.4 System calibration
The sensor, pre-amplifier and host machine of the acoustic emission testing system shall
be calibrated at least once a year. The acoustic...
......
 
(Above excerpt was released on 2017-06-08, modified on 2021-06-07, translated/reviewed by: Wayne Zheng et al.)
Source: https://www.chinesestandard.net/PDF.aspx/NBT47013.9-2012