ASTM Standard Organization has 145 writing committees from Groups A01 .. E07 .. X99.
The is for Nondestructive Testing with the methods
E07.01 on the Radiology (X and Gamma) Method
E07.02 on Reference Radiological Images
E07.03 on the Liquid Penetrant and Magnetic Particle Methods
E07.04 on the Acoustic Emission Method
E07.05 on the Radiology (Neutron) Method
E07.06 on the Ultrasonic Method
E07.07 on the Electromagnetic Method
E07.08 on the Leak Testing Method
E07.09 on Nondestructive Testing Agencies
E07.10 on Emerging NDT Methods
E07.11 on DICONDE

Annual Book of ASTM Standards consists of 82 Volumes, divided among 16 Sections.
Section E03: Metals Test Methods and Analytical Procedures
Volume E03.03: Nondestructive Testing (since 2017 two volumes, #1 from E94 to E2373, #2 from E2374 and up)

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Best Regards
Klaus