| Part | Title | Content Summary | |------|-------------------------------|---------------------------------------------------| | 1 | Scope | Vessel types, pressure limits, exclusions | | 2 | Materials | Toughness, impact testing, material traceability | | 3 | Design Based on Rules | DBR methods for shells, heads, nozzles, flanges | | 4 | Design Based on Analysis | DBA – elastic and inelastic stress analysis (e.g., FEA) | | 5 | Fabrication | Welding, forming tolerances, heat treatment | | 6 | Inspection & Testing | NDE methods, hydrostatic/pneumatic tests | | 7 | Pressure Relieving Devices | Overpressure protection requirements | | 8 | Certification | Data reports, stamping (U2, UV, etc.) | | 9 | Annexes | Normative and non-mandatory appendices |

The Division 2 standard is organized into the following major parts:

This is often referred to as Instead of simply checking if a wall thickness is sufficient based on a formula, the engineer must analyze how stresses distribute through the vessel wall, particularly around discontinuities like nozzles, heads, and supports.

The code is structured to prioritize efficiency through advanced engineering methods. Notable aspects include: