This standard specifies the classification, technical requirements and inspection methods of probes for ultrasonic testing (ultrasonic probes). This standard applies to straight probes and angle probes with nominal frequencies from 0.5 MHz to 15 MHz, including contact probes, liquid immersion probes, focused probes, and non-focused probes. It is also applicable to type inspection and factory inspection of ultrasonic probes. This standard also applies to It can be used as the basis for acceptance of user orders. This standard does not apply to surface wave probes and phased array probes.