PHMSA Pipeline Safety Regulations — 49 CFR Part 192 (Gas) and Part 195 (Hazardous Liquids)

PHMSA Pipeline Safety Regulations — 49 CFR Part 192 (Gas) and Part 195 (Hazardous Liquids)

Record: petroleum-reg-019 (Petroleum, flagship regulation). Issuing body: U.S. Pipeline and Hazardous Materials Safety Administration (PHMSA), Department of Transportation.

1. What it is, who issues and enforces it

Parts 192 and 195 are the federal minimum safety standards for pipeline transportation: Part 192 covers transportation of natural gas and other gas by pipeline; Part 195 covers hazardous liquids (crude oil, refined products, NGLs, anhydrous ammonia, and — by 2024 rule — carbon dioxide in supercritical/dense phase). Issuer: PHMSA. Enforcer: PHMSA's Office of Pipeline Safety plus state partners — interstate pipelines are federally inspected; intrastate pipelines are largely inspected by state agencies under certification agreements applying the same federal standards. Enforcement tools: warning letters, notices of probable violation, compliance orders, corrective action orders, and civil penalties.

2. Scope, triggers, thresholds

• Part 192 — gas transmission, distribution, and regulated gathering pipelines (including Type A, B, and C gathering with tiered requirements since the 2021 gas gathering rule), LNG facilities (Part 193), and underground natural gas storage (Part 192 Subpart N / 2016–2017 interim rules made final).
• Part 195 — hazardous liquid pipeline facilities, with integrity management for segments that could affect a High Consequence Area (HCA) — populated areas, drinking-water sources, ecologically sensitive areas.
• Both parts impose: design and construction standards, materials qualification, welding, corrosion control (cathodic protection, coating), operations and maintenance procedures, operator qualification (OQ, Subpart N / §195.501), damage prevention, public awareness, control-room management, and integrity management programs (IMP) — Subpart O (gas transmission) and §195.452 (hazardous liquids) — requiring baseline and periodic reassessments (ILI, pressure testing, direct assessment, or ECA) on 10-year-maximum cycles with risk-ranked scheduling.

3. Key compliance obligations

1. Integrity management. Written IMP identifying HCAs, baseline assessment, continual reassessment (≤10 years for gas transmission; §195.452 similar for liquids), preventive and mitigative measures, and performance metrics.
2. Corrosion control. External corrosion: cathodic protection meeting §192.463/§195.571 criteria with periodic monitoring; internal corrosion programs where corrosive gas/liquids are transported; atmospheric corrosion inspection.
3. Damage prevention and public awareness. One-call participation, pipeline markers, public-awareness programs per API RP 1162.
4. Operator qualification. Covered tasks performed by qualified individuals; re-evaluation intervals.
5. Leak detection (liquids). Computational pipeline monitoring and effective leak-detection capability, extended by recent rulemakings beyond HCAs to non-HCA single-phase onshore lines (compliance phased over years from the final rule's publication).
6. Valve and rupture-mitigation. The 2022 gas transmission valve rule requires rupture-mitigation valves (RMV) or alternative equivalent technology on new/replaced transmission lines ≥6-inch diameter, with shut-off time and spacing requirements.
7. Reporting. Incident/accident reports (telephonic + written), annual reports, safety-related condition reports, MAOP reconfirmation records (gas transmission, post-2019 rule: records-based reconfirmation of maximum allowable operating pressure by 2028/2035 milestones depending on method).

4. Penalties and consequences

49 U.S.C. §60122 civil penalties (inflation-adjusted; commonly cited ~$260,000+ per violation per day, ~$2.6M+ series maximum — verify current figures):

• Civil penalties per violation per day, with statutory caps per related series of violations.
• Compliance and corrective action orders — PHMSA can order pressure restrictions or shutdowns, which cost operators far more than the fines.
• Criminal referral for knowing and willful violations causing death or injury.
• Post-incident enforcement routinely pairs penalties with consent orders mandating years of enhanced inspection and third-party audits.

5. Version and live changes (checked 2026-09-30)

Recent rulemaking activity relevant to practitioners:

• Repair-criteria modernization (proposed 2026): PHMSA proposed a unified three-tiered anomaly response schedule (immediate / near-term / other) replacing the separate gas-transmission and hazardous-liquid response regimes, including a revised immediate criterion for cracks (FPR ≤ 1.1) responding to the D.C. Circuit's INGAA remand. Proposed, not final as of September 2026.
• Leak Detection and Repair NPRM (2023): proposed methane-focused LDAR, venting minimization, and pressure-relief-device requirements for Part 192 operators. Proposed, not final.
• Standards-update direct final rules (2025): PHMSA issued DFRs incorporating updated industry standards (e.g., API Std 620); at least one DFR was withdrawn effective October 2, 2025 after adverse comment — a reminder to verify the current incorporation-by-reference list in §192.7/§195.3 rather than assuming the DFR took effect.
• Gas gathering rule (effective 2022) brought large-diameter, high-pressure rural gathering lines under Part 192 — operators of previously unregulated gathering should confirm their Type A/B/C classification.
• Flag: PHMSA rulemaking has been stop-start; always check the current CFR and the Federal Register for the provision at issue.

6. Related certifications

• API 510/570/653 (Petroleum flagships) — vessel/piping/tank inspection credentials whose damage-mechanism and inspection-planning knowledge directly supports IMP execution (though pipeline IMP assessment has its own practitioner community).
• AMPP CP1–CP4 (Materials flagship) — cathodic-protection competence behind the corrosion-control obligations.
• PE (Petroleum) — MAOP reconfirmation analyses, ECA work, and IMP engineering are licensed work.
• OPITO BOSIET / IWCF / IADC WellCAP — offshore/drilling safety credentials; complementary but distinct from pipeline safety.

7. Honest flags

• Penalty figures are inflation-adjusted; verify current numbers.
• The 2026 repair-criteria proposal and 2023 LDAR proposal are not final rules — do not plan compliance around them, but do track them.
• Intrastate enforcement practice varies by state agency; the federal minimums are the floor, and some states add requirements.

Record: petroleum-reg-019.

Original ETS reference writing, verified against public sources on 2026-09-30. Thin sourcing is flagged inline. Not legal advice — confirm current editions with the issuing body.