Before diving into specific codes, it is critical to understand why a single document or standard is rarely enough. A typical onshore gas pipeline project might reference:
Without a compendium approach, engineers risk missing a critical reference. A proper compendium categorizes standards by lifecycle phase: Design, Materials, Construction, Testing, Operations & Maintenance, and Integrity Management. asme pipeline standards compendium
The compendium is built around three primary ASME codes, each covering a distinct phase of a pipeline's lifecycle: Before diving into specific codes, it is critical
| Standard | Title | Notes | |----------|-------|-------| | ASME BPVC Section IX | Welding and Brazing Qualifications | Welder & procedure qualification (referenced by B31.4/B31.8) | | ASME B31.3 | Process Piping | Often used for pipeline station piping & auxiliaries | Without a compendium approach, engineers risk missing a
| Pitfall | Consequence | Compendium Fix | | :--- | :--- | :--- | | Using B31.8 for a liquid CO2 pipeline | CO2 is a dense fluid; B31.4 is required for liquid-phase CO2. | Include fluid phase diagrams in your compendium’s scope section. | | Ignoring B31.8S for old pipelines | Failing to reassess legacy lines for HCAs leads to regulatory fines. | Mandate a “legacy integrity review” workflow using B31.8S. | | Confusing B31.12 Tier 1 vs Tier 2 | Using Tier 1 rules for a high-pressure hydrogen line risks embrittlement failure. | Create a decision tree: If pressure > 5,000 psi → Tier 2 requirements. | | Overlooking B31Q for welders | Unqualified welders produce code-violating joints that fail unexpectedly. | Link B31Q qualification records to each weld traceable number (WTN). |