Final answer:
The examination of piping welds in normal fluid service through random radiography typically must comply with industry standards such as ASME B31.3, which recommends examination of at least 5% of all welds.
Step-by-step explanation:
For normal fluid service, the requirement for the examination of piping welds through random radiography depends on the standards set by the industry and project specifications.
According to the ASME B31.3 process piping code, which is commonly used in many industrial applications, at least 5% of all welds should be examined if the piping is categorized under normal fluid service. However, the exact percentage might vary depending on the pressure, temperature, and the fluid being conveyed, as well as any additional client or legal requirements.