PHMSA Plastic Pipe Final Rule

[Docket No. PHMSA-2014-0098: Amdt. No. 192-124]

PHMSA is amending the Federal Pipeline Safety Regulations that govern the use of plastic piping systems in the transportation of natural and other gas. These amendments are necessary to enhance pipeline safety, adopt innovative technologies and best practices, and respond to petitions from stakeholders. The changes include increasing the design factor of polyethylene pipe; increasing the maximum pressure and diameter for Polyamide-11 pipe and components; allowing the use of Polyamide-12 pipe and components; new standards for risers; more stringent standards for plastic fittings and joints; stronger mechanical fitting requirements; the incorporation by reference of certain new or updated consensus standards for pipe, fittings, and other components; the qualification of procedures and personnel for joining plastic pipe; the installation of plastic pipe; and a number of general provisions.

The Final Rule will only apply to new, repaired, and replaced pipelines. Regulatory updates include an increased design factor for polyethylene pipe; updated standards governing the use, maximum pressure limits, and diameters for pipelines made of polyamide 11 and 12 thermoplastics; new and expanded standards for the installation of plastic pipe to help mitigate contact with other underground utilities and structures; and several other installation and operational related provisions for plastic pipe and plastic pipe components.

As a result of the Final Rule’s updated design factor, the cost of materials to produce new pipe is estimated to be reduced by 10 percent, resulting in an annual material cost savings of approximately $32 million for transmission, gathering, and distribution operators.

This final rule is effective 60 days after the date of publication in the Federal Register. For a copy of the Plastic Pipe Final Rule, contact Jessica Foley.

PHMSA Pipeline Safety: Guidance on the Extension of the 7-year Integrity Management Reassessment Interval by 6 Months

[Docket No. PHMSA-2018-0073]

On November 15, 2018, PHMSA published a document titled “Pipeline Safety: Guidance on the Extension of the 7-year Integrity Management Reassessment Interval by 6 Months.” PHMSA is requesting comments on the FAQs developed for the aforementioned subject.

Under the amended section 5 of the Pipeline Safety, Regulatory Certainty, and Job Creation Act of 2011, an operator may request an extension of 6 months beyond the required 7-year reassessment interval of high-consequence areas (HCA). The guidance consists of one revised and two new FAQs on the eligibility for this type of extension. The main points of the FAQs are summarized below.

  • In order to request an extension of no more than 6 months, an operator must notify PHMSA 180 days prior to the end of the 7-year assessment date (49 CFR 192.949).
  • The operator must include documentation (49 CFR 192.943) which:
    • Explains why the deadline could not be met and how it will not compromise safety
    • Identifies any additional actions to ensure public safety during the extension period.
  • Section 192.939(a)(1) specifies two options for establishing reassessment intervals: (i) considering identified threats, assessment results, data integration, and risk analysis, or (ii) using Table 3 of ASME/ANSI B31.8S. Operators choosing option (i) may establish intervals longer than those in Table 3 but must not exceed the maximum intervals listed in the table in 192.939.
  • For operators conducting assessments by pressure testing:
    • Higher pressure tests are required to justify reassessment intervals which extend beyond the 7 years (192.937(c)(2), 192.937(a), and 192.939(a) and (b)).
    • If using test pressures meeting Subpart J requirements, the operator may establish a 7-year reassessment interval regardless of the result from Table 3, unless their analysis under 192.939(a)(i) indicates a need for a shorter interval.
    • If using test pressures and reassessment intervals from Table 3, the operator may establish a reassessment interval up to the maximums listed in the table in 192.939, unless their analysis under 192.939 indicates a need for a short interval. In order to establish intervals longer than 7 years, the operator must conduct a confirmatory direct assessment within the 7-year period. This assessment may be substituted with a low-stress reassessment per 192.941 for pipe segments operating under 30% specified maximum yield strength (SMYS).

Comments can be submitted on the e-gov website on or before December 17, 2018. Reference Docket No. PHMSA-2018-0073 when submitting comments. For a copy of the Notice from the Federal Register, contact Jessica Foley.

Senate Committee Hearing on Pipeline Safety in the Merrimack Valley: Incident Prevention and Response

[Docket No. PHMSA-2018-0073]

The US Senate on Commerce, Science and Transportation held a hearing on November 26th to hear testimony regarding the over-pressurization incident that occurred in Merrimack Valley Massachusetts on September 13, 2018. Representatives from the federal, state and local government, emergency responders, NiSource and affected public provided testimony, including what actions are being taken to understand the causes of the incident and what steps are being taken to prevent a similar incident from occurring in the future.

To read and/or download copies of testimonies, click here.

NTSB Emergency Recommendation in response to the Merrimack Valley Incident

[Docket No. PHMSA-2018-0073]

On September 13, 2018, a series of explosions and fires occurred after high-pressure natural gas was released into a low-pressure gas distribution system in the northeast region of the Merrimack Valley, Massachusetts. The distribution system was owned and operated by Columbia Gas of Massachusetts, a subsidiary of NiSource. The National Transportation Safety Board (NTSB) has issued five urgent safety recommendations as investigation of this incident continues:

To the Commonwealth of Massachusetts:

Eliminate the professional engineer licensure exemption for public utility work and require a professional engineer’s seal on public utility engineering drawings. (P-18-005)

To NiSource:
  1. Revise the engineering plan and constructability review process across all of your subsidiaries to ensure that all applicable departments review construction documents for accuracy, completeness, and correctness, and that the documents or plans be sealed by a professional engineer prior to commencing work. (P-18-006) (Urgent)
  2. Review and ensure that all records and documentation of your natural gas systems are traceable, reliable, and complete. (P-18-007) (Urgent)
  3. Apply management of change process to all changes to adequately identify system threats that could result in a common mode failure. (P-18-008) (Urgent)
  4. Develop and implement control procedures during modifications to gas mains to mitigate the risks identified during management of change operations. Gas main pressures should be continually monitored during these modifications and assets should be placed at critical locations to immediately shut down the system if abnormal operations are detected. (P-18-009) (Urgent)

The preliminary report and related recommendations can be found on the NTSB Investigations webpage.

AGA: Leading Practices to Reduce the Possibility of a Natural Gas Over-Pressurization Event

The American Gas Association (AGA) has published a 43-page document intended to provide guidance to natural gas utilities on leading practices that may supplement current practices to reduce the possibility of an over-pressurization event, especially in a utilization pressure system. The document contains practices above and beyond minimum federal regulations, recognizing that not all practices will be applicable given the size, configuration, pressures, and other features of a particular system. The document addresses the following as related to preventing over-pressurization of gas distribution systems:

  • Design of Distribution Systems and Regulator Stations
  • Operating Procedures and Practices
  • Human Factors
  • Managing the Risk of an Over-pressurization Event

AGA has posted this document on their website.

Introduction to the Unified Agenda of Federal Regulatory and Deregulatory Actions – Fall 2018

The Unified Agenda has appeared in the Federal Register twice each year since 1983 and has been available online since 1995. The complete Fall 2018 Unified Agenda contains the Regulatory Plans of 28 Federal agencies and 66 Federal agency regulatory agendas providing information about regulations that the Government is considering or reviewing.

The Fall Edition of the Unified Agenda include the agency regulatory plans required by Executive Order 12866, “Regulatory Planning and Review,” which identify regulatory priorities and provide additional detail about the most important significant regulatory actions that agencies expect to take in the coming year. All federal regulatory agencies have chosen to publish their regulatory agendas as part of this publication.

The complete Unified Agenda and Regulatory Plan can be found online. The online Unified Agenda offers flexible search tools and access to the historic Unified Agenda database to 1995. A reduced print version can be found in the Federal Register. Information regarding obtaining printed copies can also be found on the Reginfo.gov website.

Meeting of the Voluntary Information-Sharing System Working Group

JANUARY 8-10, 2019

The Voluntary Information-sharing System (VIS) Working Group is meeting to discuss proposed recommendations to establish a voluntary information-sharing system. The public meeting will be held on December 18th from 9:00 a.m. to 5:00 p.m. ET and December 19th from 8:30 a.m. to 5:00 p.m. ET. Members of the public who wish to attend in person should register no later than December 11. The meeting will be held at the U.S. Department of Transportation, 1200 New Jersey Ave. SE, Washington, DC 20590. The meeting agenda and additional information can be found on the VIS Working Group registration webpage.   

DOT Pipeline Compliance Workshop

JANUARY 8-10, 2019

Join us January 8-10, 2019 in Houston at our corporate office and dedicated training facility for an informative, lively, and interactive workshop on DOT Pipeline Compliance topics. The workshop provides an overview of the DOT pipeline regulations in 49 CFR 191, 192, 194, 195, 196, and 199. It also describes pipeline operations and engineering concepts. It is appropriate for people who are new to pipeline regulations, who could use a refresher, or anyone who needs to know the latest developments in these areas. This workshop will be a combined format, addressing both gas and liquid pipeline topics in parallel. This will eliminate some redundancy of materials, and will allow more time for in-depth discussions for each topic.

Topics to be addressed in the workshop include:

  • An overview of DOT/OPS pipeline compliance requirements
  • State and Federal agency roles for pipeline safety
  • PHMSA Jurisdiction
  • PHMSA Inspections and Enforcement Processes
  • Engineering Concepts and Stress/Strain Relationships; %SMYS
  • Design Requirements
  • Construction Requirements
  • Corrosion Control Concepts and Requirements
  • Operations and Maintenance Requirements
  • Emergency Response Requirements (including spill response planning requirements for liquid pipelines)
  • Damage Prevention Programs
  • Operator Qualification Programs
  • Drug and Alcohol Programs
  • Public Awareness Programs
  • Integrity Management (gas and liquid) Programs
  • Control Room Management Programs

We will also discuss the PIPES Act of 2016; recent Advisory Bulletins from PHMSA; and new, pending and proposed rulemakings.

Each attendee will receive the presentation as well as applicable handouts in a hardcopy notebook, and electronic copies of the applicable regulations and voluminous reference materials including rulemakings, letters of interpretation, and other guidance documents. The workshop will adjourn at 2 p.m. on the third day, for those who need to fly out Thursday evening.

To register for our workshop, click here.

Free Training on Pipeline Safety for Non-Pipeline Personnel

May 8-10, 2019; Houston, TX

The Pipeline Safety Trust (PST) received a grant in 2017 and again in 2018 to send 20-30 people from local and tribal government, and non-profit organizations to an in-depth training on pipeline safety. Their goal with this training is to provide attendees with the information they need to better understand pipelines and pipeline regulations. With this information, participants will be better able to understand the daily operations and potential risks from pipelines, and hopefully develop programs and engage in regulatory processes that address these risks more effectively. This training focuses on the safety of existing (or soon to be existing) pipelines, and will not get into other important related issues such as the impacts of oil and gas production methods, the impacts from the use of the fuels pipelines transport, or the regulatory system for the siting of new pipelines.

The training will be held May 8-10, 2019 and take place in downtown Houston, Texas. Over the course of this three-day training, attendees will learn how pipelines are constructed, operated, maintained, inspected and regulated, as well as a review of the different types of pipelines and the major failure causes and what is done to try to prevent those failures. The PST seeks to fund people who will continue to be involved in pipeline safety issues in years to come. This training will be provided by RCP at our headquarters in downtown Houston. All travel costs for the selected attendees will be paid by the Pipeline Safety Trust.

Application for the 2019 training is now open. To apply go fill out the short nine question application here. If you know of other people who might be interested in this training please forward them this notice.

For any questions send an email to carl@pstrust.org or call at (360) 543-5686.

Editor’s Note: Those of you who work in the for-profit world should plan to attend RCP’s regular 3-day DOT training course on the following week, May 14-16. Please forward this notice to those people in the non-profit world who have a legitimate need and desire to understand pipelines and pipeline safety.

Ongoing Resources

These articles are maintained and updated as new information becomes available.

Last Updated: October 2026

Regulatory Watch: Key Dates & Deadlines

Welcome to Regulatory Watch! In this monthly update, we’ll keep you informed on proposed rule comment periods, effective dates, and upcoming deadlines for various compliance requirements.

Proposed Rule Stage

2137-AF37Proposed Rule Stage

Oil Spill Response Plans, Accident Notifications, Inspections and Investigations and other Miscellaneous Pipeline Safety Changes

2137-AF52Proposed Rule Stage

Pipeline Operational Status

2137-AF60Proposed Rule Stage

Safety of Carbon Dioxide and Hazardous Liquid Pipelines

Final Rule Stage

2137-AF53Final Rule Stage

Safety of Gas Distribution Pipelines and Other Pipeline Safety Initiatives

Sprint I & II Update

To further the Administration’s deregulatory policies, PHMSA has published in today’s Federal Register twenty-eight (28) separate rulemaking actions affecting the pipeline safety regulations (PSR; Parts 190-199). Click here to access the documents.

Rulemaking Description Stage Code
Pipeline Safety: Rationalize Special Permit Conditions PHMSA proposes to amend its special permit procedures to ensure permit conditions are directly tied to the specific pipeline safety regulations being waived. NPRM 49 CFR Part 190
Pipeline Safety: Rationalize Calculation of Regulatory Filing and Compliance Deadlines PHMSA will clarify that regulatory filing and compliance deadlines falling on weekends or Federal holidays automatically move to the next business day. DFR 49 CFR Part 190
Pipeline Safety: Adjust Annual Report Filing Timelines PHMSA will amend annual reporting requirements to move the gas pipeline annual report submission deadline from March to June. DFR 49 CFR Part 191
Pipeline Safety: Property Damage Definition for Incident Reporting PHMSA will clarify incident reporting property damage calculations for gas pipelines and update hazardous liquid accident reporting thresholds using inflation-adjusted criteria. DFR 49 CFR Parts 191 & 195
Pipeline Safety: Exception for In-Plant Piping Systems PHMSA proposes to clarify that in-plant piping systems are not subject to federal pipeline safety regulations. NPRM 49 CFR Part 192
Pipeline Safety: Codify Enforcement Discretion on Incidental Gathering Lines PHMSA proposes to codify enforcement discretion clarifying that restrictions on the historical incidental gathering line exemption apply only to newly constructed lines. NPRM 49 CFR Part 192
Pipeline Safety: Eliminate Burdensome Coating Assessment Deadlines PHMSA proposes to replace prescriptive deadlines for coating damage assessments and remediation with a requirement that activities be completed before the pipeline is placed in service. NPRM 49 CFR Part 192
Pipeline Safety: Atmospheric Corrosion Reassessment for Pipeline Replacements PHMSA proposes to remove the 3-year reassessment interval following replacement of atmospheric corrosion defects and allow use of the standard 5-year reassessment interval. NPRM 49 CFR Part 192
Pipeline Safety: Harmonize Class Change Pressure Test Requirements PHMSA proposes to reduce the minimum pressure test duration following certain class location changes from 8 hours to 4 hours, aligning with existing Subpart J requirements. NPRM 49 CFR Part 192
Pipeline Safety: Clarify MAOP Reconfirmation Testing Records PHMSA will issue a technical correction clarifying that operators may use pre-1970s pressure test records when reconfirming MAOP under §192.624. Final Rule 49 CFR Part 192
Pipeline Safety: Remote Sensing Technologies for ROW Patrols PHMSA will explicitly allow right-of-way patrols to be conducted using unmanned aircraft systems, satellites, and other remote sensing technologies. DFR 49 CFR Parts 192 & 195
Pipeline Safety: Technical Standards Updates and Amendments PHMSA will update incorporated standards and make technical amendments in response to an industry petition for reconsideration. Final Rule 49 CFR Part 192
Pipeline Safety Program: Update of Standards Incorporated by Reference PHMSA issued multiple direct final rules updating incorporated industry consensus standards used throughout Parts 192 and 195, replacing outdated editions with current versions. Multiple DFRs 49 CFR Parts 192 & 195

The following is a summary of the 40 rulemakings that PHMSA published in the Federal Register on April 24, 2026. If any adverse comment is received to a DFR PHMSA must rescind the rule and repropose. Click here to access the documents.

Rulemaking Description Stage Code
Pipeline Safety and Hazardous Materials Safety: Amendments to PHMSA Procedural Regulations PHMSA proposed miscellaneous amendments to procedural regulations governing informal rulemaking for both pipeline safety and hazardous materials programs. NPRM 49 CFR Part 190
Pipeline Safety: Interpretation Request Procedures PHMSA amended interpretation procedures to require publication of interpretation requests on its website and provide an opportunity for public comment. Final Rule 49 CFR Part 190
Pipeline Safety: Declaratory Order Procedures PHMSA established formal procedures for issuing declaratory orders through a new section in Part 190. Final Rule 49 CFR Part 190
Pipeline Safety: Consent Orders PHMSA clarified that consent agreements may be used to resolve enforcement actions, including cases involving civil penalties. Final Rule 49 CFR Part 190
Pipeline Safety: Adjustment to OPID Notifications for Construction PHMSA proposed adjusting the inflation-based threshold that triggers OPID notifications for certain construction and facility modification activities. NPRM 49 CFR Part 191
Pipeline Safety: Eliminating Limitations on Welders and Welding Operators PHMSA proposed allowing welders qualified through non-destructive testing methods to perform compressor station welding activities currently subject to additional restrictions. NPRM 49 CFR Part 192
Pipeline Safety: Material Properties Verification During MAOP Reconfirmation PHMSA proposed clarifying that material testing at pressure test manifold sites is not required when traceable, verifiable, and complete material records already exist. NPRM 49 CFR Part 192
Pipeline Safety: Electronic Retention of Part 194 Response Plans PHMSA amended regulations to allow operators to maintain electronic copies of response plans instead of paper copies. DFR 49 CFR Part 194
Pipeline Safety: Remote Monitoring of Rectifiers PHMSA proposed allowing remote monitoring technologies for rectifiers used in external corrosion control programs. NPRM 49 CFR Part 195
Pipeline Safety: Clarifying Hazardous Liquid High-Consequence Area Designations PHMSA amended HCA guidance to clarify spill considerations in agricultural fields and reorganize threat identification guidance. DFR 49 CFR Part 195
Pipeline Safety: Timeframe to Make Rupture-Mitigation Valves Operational PHMSA proposed extending the deadline for placing rupture-mitigation valves into operation from 14 days to 90 days after a pipeline enters service. NPRM 49 CFR Part 192
Pipeline Safety: Hazardous Liquid Valve Maintenance Schedule PHMSA proposed allowing operators to implement risk-based valve maintenance schedules, subject to a maximum inspection interval of one year. NPRM 49 CFR Part 195
Pipeline Safety: Property Damage Definition for Incident Reporting PHMSA proposes revising property damage thresholds for reportable gas and hazardous liquid pipeline incidents and clarifying applicability to telephonic notifications. NPRM 49 CFR Parts 192 & 195
Pipeline Safety: Remote Sensing Technologies for ROW Patrols PHMSA proposes clarifying that unmanned aerial systems, satellites, and other remote-sensing technologies may be used to satisfy right-of-way patrol requirements. NPRM 49 CFR Parts 192 & 195
Pipeline Safety: Adjust Annual Report and NPMS Filing Timelines PHMSA proposes extending annual report and NPMS submission deadlines for gas pipeline and storage operators to June 15 each year. NPRM 49 CFR Part 191
Pipeline Safety: Editorial Corrections and Clarifications PHMSA issued multiple final rules correcting editorial errors, updating references, removing obsolete submission methods, and improving regulatory clarity. Final Rules Various
Pipeline Safety: Update of Standards Incorporated by Reference PHMSA issued multiple direct final rules updating incorporated industry consensus standards, including NFPA, ASTM, MSS, NACE, and ASME standards. Multiple DFRs 49 CFR Parts 192 & 195

Have questions about an upcoming deadline? Please reach out to Jessica Foley for assistance!

Last Updated: October 2026

Conference News

Jan252027

Pipeline Pigging and Integrity Management Conference

▦ January 25, 2027 – January 28, 2027⌖ George R. Brown Convention Center, Houston, TX

The 39th International Pipeline Pigging & Integrity Management Conference (PPIM) will take place at the George R. Brown Convention Center in Houston. The event brings together pipeline operators, engineers, and industry professionals to explore advancements in pipeline inspection, integrity management, risk assessment, and emerging technologies.…

ExhibitingBooth 524
RCP Team Attending
Heather RoarkHeather RoarkSales & Marketing Coordinator
Jessica FoleyJessica FoleyVice President
Featured Presentations
Chris McLaren
Chris McLarenExecutive Consultant
October 27, 2026 at 7:30 AM
Event Details

Last Updated: October 2026

PSI Training Schedule

Date Training Course Price Registration
Nov 17 – Nov 19, 2026 DOT Pipeline Compliance Workshop $2,150 SOLD OUT
Feb 16 – Feb 18, 2027 Pipeline Safety Audit Training $2,150 Register →
Feb 23 – Feb 25, 2027 Advanced Pipeline Risk Assessment Workshop $2,150 Register →
Mar 23 – Mar 25, 2027 DOT Pipeline Compliance Workshop $2,150 Register →

WEBINAR RECORDING!
Unpacking the Key Updates in API RP 1170 & 1171, 2nd Edition

RCP and the Pipeline Safety Institute offered a free webinar exploring the 2nd Editions of API RP 1170, Design and Operation of Solution-mined Salt Caverns Used for Natural Gas Storage and API RP 1171, Functional Integrity of Natural Gas Storage in Depleted Hydrocarbon Reservoirs and Aquifer Reservoirs. Thank you to everyone who attended and participated in this informative webinar. The session recording is posted to our YouTube channel. Please watch, like, and subscribe to our channel!

WEBINAR RECORDING
Pipeline Safety: Unpacking the Class Location Change Requirements

Thank you to everyone who attended and participated in this informative webinar. The session recording is posted to our YouTube channel. Please watch, like, and subscribe to our channel!

You asked and we listened!

Advanced DOT Pipeline Compliance Workshop is on the calendar!

This intensive and interactive 3-day, in-person workshop is designed for those who have previously completed our DOT Pipeline Compliance Workshop and are ready to take their knowledge to the next level.

New Workshop Alert!

Prepare Your Team for Pipeline Safety Audits with Confidence!

Our 3-day Pipeline Safety Audit Workshop is tailored for professionals responsible for the safe operation of hazardous liquid and natural gas pipelines. Designed for groups of 10-15 participants, this interactive training…

On-Site Training Request

We have conducted on-site training for oil and gas companies for over 25 years and can provide customized workshops for companies with groups of five or more.

Season’s Greetings from RCP!
RCP would like to thank our valued clients for a wonderful year. We appreciate the opportunities you have given us to serve as your Professional Engineers, Regulatory Experts, and Trusted Partners. We look forward to working with you on even more projects in the years ahead. Best wishes for the holiday season and the New Year, from your friends at RCP.

Sincerely,

W. R. (Bill) Byrd, PE
President
RCP Inc.