With OSHA’s recent revision of their definition of “retail”, there are literally thousands of ammonia facilities that have entered into the world of PSM and have gone from RMP 2 to RMP 3. So this posting is just to offer some insight and/or an alternative to API 510 inspection practices and to help those facilities new to the Mechanical Integrity Inspection requirements understand what a MI inspection should look like for their pressure vessels and RVs.
What an Ammonia Vessel inspection and their RVs should look like
