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.
Contents
Foreword II
1. Scope
2. Normative References
3. General Requirements
4. Ultrasonic testing and quality classification of raw materials and spares for the pressure equipment
5. The ultrasonic testing and quality classification of butt welding joint for the pressure equipment
6. Ultrasonic testing and quality classification of circumferential butt welding joint for pipes and pressure pipeline of the pressure equipment
7. The ultrasonic detection of press equipment in-service
8. Ultrasonic detection reports
Annex C (Normative) Ultrasonic Crossing Testing on Pressure Equipments with Steel Forgings
Annex D (Normative) Axial-direction Crossing Testing on Full-fusion Welding of Pressure Equipments with Steel High-pressure Seamless Pipe
Annex E (Normative) Angle probe Testing on Pressure Equipments with Austenitic Steel Forging
Annex F (Normative) Measurement for Loss Allowance in Sound Energy Transmission
Annex G (Normative) Ultrasonic Testing and Quality Gradation for the Butt Welding Joints of 6mm~8mm Steel Pressure Equipments
Annex H (Normative) Dynamic Waveform of Echo
Annex J (Normative) Height Measurement of Flaws (2) Height Measurement of Flaws with Ultrasonic Terminal Maximal Echo Method
Annex K (Normative) Height Measurement of Flaws (3) Height Measurement of Flaws with 6dB Method
Annex L (Normative) Type Identification and Property Judgment of Flaws
Annex M (Informative) Ultrasonic Testing and Quality Gradation for the Butt Welding Joints of Titanium Pressure Equipments
Annex N (Informative) Ultrasonic Detection and Quality Gradation of Austenitic Stainless Steel Butt-welding Joints
