Standard No.:	JB/T 4009-2020
English Name:	Non-destructive testing-test method for ultrasonic testing and evaluation of discontinuities by contact pulse-echo longitudeinal waves
Chinese Name:	无损检测 接触式超声纵波脉冲回波检测和评定不连续方法
Professional Classification:	JB    Professional Standard - Machinery
Issued by:	MIIT
Issued on:	2020-04-16
Implemented on:	2021-1-1
Status:	valid
Superseding:	JB/T 4009-1999 Recommended practice for ultrasonic pulse-echo straight-beam testing by the contact method
Language:	English
File Format:	PDF
Word Count:	6500 words
Price(USD):	195.0
Delivery:	via email in 1~3 business day

本标准规定了使用直射探头与被检材料（原材料或零部件）直接接触，以脉冲纵波反射方式进行超声检测时应遵循的一般要求和检测程序，同时对设备、参考试块、评定规程以及检测报告等作了详细要求。
本标准可作为供需双方确定技术协议时的参考资料，也可用于编制检测工艺规程。