Please give it a rest ed, and let us know how the proof testing goes for you.

A minimum pressure test would be 1 and 1/2 times the pressure of your intended load.

Entropy Engineering Corporation
http://www.entropyec.com/services.html

NTS Chesapeake (Belcamp, MD) | Ballistic & Materials Testing Lab
https://nts.com/services/testing/

Dayton T. Brown
https://www.dtb.com