This part of GB/T 34370 specifies the ultrasonic testing method for amusement equipment as well as quality grading and ultrasonic thickness measurement requirements.
It is applicable to the ultrasonic testing of metal raw materials, parts and components as well as welded joints of both amusement equipment and in-use amusement equipment.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
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 equipments - 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 detection
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 testing instruments
3 Terms and definitions
For the purpose of this standard, the terms and definition specified in GB/T 12604.1, GB/T 20306, GB/T 20737 and GB/T 34370.1 and the following apply.
3.1
loss of back reflection caused by flaws BG/BF(dB)
the ratio of the first bottom echo amplitude BG in the flaw-free area near the flaw area to the first bottom echo amplitude BF in the flaw area, it is expressed by dB
3.2
basic and scanning sensitivities
f
basic sensitivity is generally referred to as record sensitivity, it is usually used for sizing and grading of flaws, while scanning sensitivity mainly refers to the actual test sensitivity. for fear of missing the record flaws or certain specific flaws, and in order to ensure the safety of amusement equipment, the higher scanning sensitivity shall be adopted in actual testing. In principle, the scanning sensitivity shall not be lower than the basic sensitivity
3.3
focusing angle beam probe
ultrasonic angle probe converging the ultrasonic beam with a focusing method of lenticular, emissive, and a curved crystal form to improve the test sensitivity
GB/T 34370.5-2017 The following standards are cited：
GB/T 34370.5-2017 Cited by the following standards：
