However, the compendium is not a static relic. As technology advances, the ASME standards evolve. The introduction of new materials, such as high-strength composites, and new inspection technologies, like "smart pigging" (pipeline inspection gauges), requires the code to be updated regularly. This is achieved through a rigorous consensus process involving industry experts, manufacturers, and regulators. This dynamic nature ensures that the compendium remains relevant, balancing traditional safety factors with the efficiencies offered by modern innovation.

| Parameter | B31.4 (Liquid) | B31.8 (Gas) | B31.12 (H2) | | :--- | :--- | :--- | :--- | | Design factor (Class 1) | 0.72 | 0.72 | 0.5 (Tier 1) | | Hydrostatic test factor | 1.25 x MAOP | 1.25 x MAOP (Class 1) | 1.25 x MAOP | | Min. valve spacing | 15 miles | 7.5 miles (Class 1) | 10 miles | | Material impact test temp | -30°F | -20°F (typical) | -50°F |

Provides a technical methodology for evaluating fitness-for-service in pipelines affected by corrosion. ASME B31Q: Pipeline Personnel Qualification