Final answer:
Pressure piping data reports must be retained on file by the owner for at least 10 years.
Step-by-step explanation:
The subject of this question is Engineering and the grade is College.
Pressure piping data reports need to be retained on file by the owner for at least 10 years.
This is important because the documentation serves several purposes, such as providing data to review designs when problems occur and data to prove hours worked.