Asme Pipeline Standards Compendium Today

While ASME B31.4 covers dense-phase CO2, the industry is pushing for a standalone B31.4X or an appendix in B31.12 for CO2 purity requirements (e.g., water content limits to avoid carbonic acid corrosion).

| If you need to… | Start with… | Then refer to… | |----------------|--------------|----------------| | Design a liquid pipeline | B31.4 | B16.9 (fittings), B36.10M (pipe) | | Design a gas pipeline | B31.8 | B31.8S (integrity), B31G (corrosion) | | Design a hydrogen pipeline | B31.12 | B31.8 (backing for low-pressure) | | Qualify a welder | BPVC Sec. IX | B31.4 or B31.8 (owner requirements) | | Repair an in-service dent/corrosion | PCC-2 | B31.8S (integrity check) | | Run an ILI tool on gas line | B31.8V | B31.8S (threat assessment) | | Pressure test without shutting down | B31.8T | Owner’s O&M manual | asme pipeline standards compendium

Gone are the days of three-ring binders. Modern compendiums are digital knowledge bases. While ASME B31

In the United States, PHMSA (Pipeline and Hazardous Materials Safety Administration) regulations often exceed ASME minimums. For example, 49 CFR 192 subpart O mandates inline inspection frequencies that B31.8S suggests as optional. Your compendium must note where the regulation is stricter. Gone are the days of three-ring binders