1. Scope
This part of JB/T 4730 specifies the ultrasonic testing methods and quality classification requirements of pressure equipments through adopting A-type ultrasonic flaw detector to inspect the flaws of the workpiece.
This part is applicable to the ultrasonic testing of the raw material, spare parts and welded joints used by the metal-made pressure equipments, and it's also applicable to the ultrasonic testing of the in-service metal-made pressure equipments.
The ultrasonic testing of the support members and the structural members related to the pressure equipments also can refer to the provisions of this part for application.
2. Normative References
The following standards contain provisions which, through reference in this text, constitute the provisions of JB/T 4730.3. For dated reference, subsequent amendments (excluding amending error in the text) to, or revisions of, any of these publications do not be applied. However, the parties whose enter into agreement according to these specifications are encouraged to research whether the latest editions of these references are applied or not. For undated references, the latest edition of the normative document is applicable to this Part.
JB/T 4730.3-2005 The following standards are cited：
