PHMSA Finalizes New Rule on Gas Pipeline Class Location Changes

• By: LGA
• On: 01/21/2026 15:25:20
• In: LGA

Dear LGA Members,

The Pipeline and Hazardous Materials Safety Administration (PHMSA) has finalized a significant new rule impacting how gas transmission pipelines must respond to class location changes driven by population growth. This rule becomes effective March 16, 2026 and has important implications for many Louisiana systems.

Attached to this message, you will find:

• PHMSA Final Rule – Class Location Change Requirements Summary

• Federal Register Final Rule (Docket No. PHMSA–2017–0151)

Why This Matters

Historically, class location changes often required operators to reduce operating pressure, conduct hydrostatic testing, or replace pipe. Under the new rule, PHMSA has codified an Integrity Management (IM) alternative, allowing eligible Class 3 transmission segments to maintain or restore MAOP through enhanced integrity management—eliminating the need for special permits.

For Louisiana operators, this rule may:

• Reduce forced capital replacement caused solely by development-driven class changes

• Improve system reliability by avoiding MAOP reductions

• Increase documentation, record verification, and integrity management expectations

• Shift compliance focus toward proactive, data-driven system planning

While the rule applies specifically to gas transmission lines, many Louisiana Local Distribution Companies own or operate transmission-pressure facilities such as city gate feeds and high-pressure feeders within municipal limits.

What Operators Should Do Now

• Review eligibility criteria carefully, particularly regarding material records, operating stress limits, and pipe characteristics

• Evaluate existing records for traceability, verification, and completeness

• Begin planning for integrity assessments, valve upgrades, and other new obligations where applicable