This inspection code applies to all refining and chemical process vessels that have been placed in service unless specifically excluded This includes:

• Vessels constructed in accordance with an applicable construction code
• Vessels constructed without a construction code (non-code)-A vessel not fabricated to a recognized construction code and meeting no known recognized standard
• Vessels constructed and approved as jurisdictional special based upon jurisdiction acceptance of particular design, fabrication, inspection, testing, and installation
• Non-standard vessels-A vessel fabricated to a recognized construction code but has lost it’s nameplate or stamping.