Posted on November 5, 2017 by webeLast updatedNovember 5, 2017 ISO 9712 Certification by NDTSS If you would like to convert your ASNT Level 3 to ISO 9712 Level 3 Approach the society to get the leads. If you would like to convert Certification from other recognized CB, you could also contact us Ms. Cheryl KHOO Certification@ndtss.org.sg