GB/T 34370.5-2017 English PDF (GBT34370.5-2017)

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GB/T 34370.5-2017: Nondestructive testing of amusement equipment -- Part 5: Ultrasonic testing
GB/T 34370.5-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 97.200.40
Y 57
Nondestructive testing of amusement equipment -
Part 5. Ultrasonic testing
ISSUED ON. SEPTEMBER 29, 2017
IMPLEMENTED ON. APRIL 01, 2018
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 4 
1 Scope ... 5 
2 Normative references ... 5 
3 Terms and definitions ... 6 
4 Summary of method ... 9 
5 Safety requirements ... 10 
6 Personnel requirements ... 10 
7 Testing equipment ... 10 
8 Testing procedure ... 16 
9 Preparation before testing ... 18 
10 Ultrasonic testing and quality grading of raw materials and components .. 20 
11 Ultrasonic testing of welded joint of amusement equipment ... 41 
12 Ultrasonic testing of in-use amusement equipment ... 69 
13 Ultrasonic thickness measurement of pulse reflection type ... 76 
14 Ultrasonic test report ... 77 
Appendix A (Normative) Performance requirements of double-crystal straight
probe ... 78 
Appendix B (Normative) Lateral-wave testing of steel plates for amusement
equipment ... 80 
Appendix C (Normative) Lateral-wave testing of steel forgings for amusement
equipment ... 83 
Appendix D (Informative) Method for adjusting the bottom-wave of workpiece
... 85 
Appendix E (Normative) Ultrasonic angle beam probe testing of steel forgings
for amusement equipment ... 87 
Appendix F (Normative) Axial lateral-wave testing of seamless steel tubes for
amusement equipment ... 90 
Appendix G (Normative) Ultrasonic testing method and quality grading of cast
iron parts ... 92 
Appendix H (Normative) Ultrasonic testing of austenitic stainless-steel butt-
welded joint ... 100 
Appendix I (Normative) Determination of the difference in acoustic energy
transmission loss ... 105 
Appendix J (Informative) Dynamic waveform of echo ... 108 
Appendix K (Normative) Phased array ultrasonic testing method ... 112 
Appendix L (Normative) Determination of flaw height by -6 dB method ... 125 
Appendix M (Normative) Typical calibration block for measurement ... 128 
Nondestructive testing of amusement equipment -
Part 5. Ultrasonic testing
1 Scope
This part of GB/T 34370 specifies the requirements for ultrasonic testing
methods, quality grading, ultrasonic thickness measurement methods for
amusement equipment.
This part applies to ultrasonic testing of metal raw materials, parts, welded joints
for amusement equipment, as well as ultrasonic testing of metal parts and
welded joints for use in amusement equipment.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
GB/T 7233.1 Steel castings - Ultrasonic examination - Part 1. Steel castings
for general purposes
GB/T 11344 Non-destructive testing - Practice for measuring thickness by
ultrasonic pulse-echo contact method
GB/T 12604.1 Non-destructive testing - Terminology - Terms used in
ultrasonic testing
GB/T 20306 Amusement devices terminology
GB/T 20737 Non-destructive testing - General terms and definitions
GB/T 27664.1 Non-destructive testing - Characterization and verification of
ultrasonic test equipment - Part 1. Instruments
GB/T 27664.2 Non-destructive testing - Characterization and verification of
ultrasonic test equipment - Part 2. Probes
GB/T 29302 Non-destructive testing instruments - Characterization and
verification of phased array ultrasonic examination systems
GB/T 34370.1 Nondestructive testing of amusement equipment - Part 1.
General requirement
JB/T 8428 Non-destructive testing - General specification for ultrasonic
blocks
JB/T 9214 Non-destructive testing - Test methods for evaluating
performance characteristics of A-scan pulse-echo ultrasonic testing systems
JB/T 10062 Testing methods for performance of probes used in ultrasonic
flaw testing
JB/T 11604 Non-destructive testing instruments - Ultrasonic thickness gauge
JB/T 11731 Non-destructive testing - General specification for ultrasonic
phased array probe
JB/T 11779 Non-destructive testing instrument - Specifications for phased
array ultrasonic detectors
3 Terms and definitions
The terms and definitions as defined in GB/T 12604.1, GB/T 20306, GB/T
20737, GB/T 34370.1 as well as the following terms and definitions apply to this
document.
3.1
Loss of back reflection caused by flaws BG/BF (dB)
The ratio of the first bottom-wave amplitude BG in a flaw-free region which
is close to the flaw to the first bottom-wave amplitude BF in the flaw region,
expressed by the value of sound pressure level (dB).
3.2
Basic and scanning sensitivities
The basic sensitivity generally refers to the recording sensitivity, which is
usually used for the quantitation of flaws and the classification of flaws. The
scanning sensitivity mainly refers to the actual testing sensitivity. In order not
to miss recording flaws or certain specific flaws, to ensure the safety of the
amusement equipment, the actual testing is usually carried out by a high
testing sensitivity for scanning. In principle, the scanning sensitivity shall not
be lower than the basic sensitivity.
probes.
7.1.2 Ultrasonic testing equipment shall have a certificate of product quality or
a certificate of conformity.
7.2 Testing equipment
7.2.1 Basic requirements for type-A pulse reflection ultrasonic tester.
a) For the type-A pulse reflection ultrasonic detector, the error of the
measured value of the transmitted pulse’s repetition frequency as
compared with the nominal value is not more than 10%; the error of the
measured value of the transmitted pulse’s voltage as compared with the
nominal value is not more than 20%; the error of the measured value of
the transmitted pulse’s width as compared with the nominal value is not
more than 10%; the rising time of the transmitted pulse is not more than
25 ns;
b) For the type-A pulse reflection ultrasonic detector, the measurement of the
working frequency based on -3 dB shall include at least the range of 0.5
MHz ~ 10 MHz. The error between the measured value and the nominal
value of the upper and lower limits of each band is not more than 20%;
c) The Type-A pulse reflection ultrasonic detector shall have a continuously
adjustable attenuation or gain of more than 80 dB. The minimum stepping
stage shall be not more than 2 dB per step. The accuracy is that the
cumulative error in any continuous 20 dB is not more than 1.7 dB, the
cumulative error in any continuous 60 dB is not more than 3 dB;
d) The performance indicators are tested according to the requirements of
GB/T 27664.1.
7.2.2 Basic requirements for ultrasonic thickness gauges.
a) When the ultrasonic thickness gauge is used for thickness measurement
of wall thickness less than 10 mm, the maximum allowable indication error
is ±0.1 mm; when it is used for thickness measurement of wall thickness
greater than 10 mm, the maximum allowable indication error is ± (0.1+H/
100) mm, where H is the nominal value of the standard-thickness block;
b) The indication stability of the ultrasonic thickness gauge is not more than
0.2 mm;
c) The performance in...