ISO 3452-1 and ISO 17628 are international standards related to non-destructive testing (NDT), specifically focused on the use of liquid penetrant testing (PT) and magnetic particle testing (MT) respectively. Here's a brief overview of each:
### ISO 3452-1: Non-destructive testing — Penetrant testing — Part 1: General principles
1. **Purpose**: This standard outlines the general principles for liquid penetrant testing, which is a widely used