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Below are the available interpretations and guidance for the given section. To return to the list of parts, use the Parts link above. If you do not see any guidance or interpretation information below, that means there is none available for the given part/section. Return to the search page to browse additional regulations sections.

PHMSA has published several Frequently Asked Questions (FAQ) documents on regulatory topics. Please review our FAQ documents below:

Additionally PHMSA has Hazardous Materials FAQs based on letters of interpretation on the following topics:

This section of the website provides the ability to find regulations information including regulations parts, content of sections, and interpretations for regulations sections. Below is a list of parts, identified by the part number and subject. To browse sections by part, click on the subject link below. You will be taken to the eCFR website to view sections for a part.

A written regulatory interpretation, response to a question, or an opinion concerning a pipeline safety issue may be obtained by submitting a written request to the Office of Pipeline Safety (PHP–30), PHMSA, U.S. Department of Transportation, 1200 New Jersey Avenue SE., Washington, DC 20590–0001 or at the email address: In addition to email address, the requestor must include his or her return address and should also include a daytime telephone number. Requests should be submitted at least 120 days before the time the requestor needs a response.

Note: electronic submission is provided as alternative to the 49 CFR Part 190.11(b) mail-in requirement.

The regulations text of the section can be found on the eCFR website. To view the regulations text, use the link below. For assistance, please send an email to

View part 192 on the ECFR website

Interpretation Responses

Ref ID Date Company Name Individual Name Response Document
PI-17-0007 The Dow Chemical Company Ms. Jennifer Ashcraft View
PI-17-0001 G2 Partners Mr. John A. Jacobi View

Regulation Sections

Section Subject
192.1 What is the scope of this part?
192.3 Definitions
192.5 Class locations
192.7 What documents are incorporated by reference partly or wholly in this part?
192.8 How are onshore gathering lines and regulated onshore gathering lines determined?
192.9 What requirements apply to gathering lines?
192.10 Outer continental shelf pipelines
192.11 Petroleum gas systems
192.12 Underground natural gas storage facilities
192.13 What general requirements apply to pipelines regulated under this part?
192.14 Conversion to service subject to this part
192.15 Rules of regulatory construction
192.16 Customer notification
192.51 Scope
192.53 General
192.55 Steel pipe
192.59 Plastic pipe
192.63 Marking of materials
192.65 Transportation of pipe
192.101 Scope
192.103 General
192.105 Design formula for steel pipe
192.107 Yield strength (S) for steel pipe
192.109 Nominal wall thickness (t) for steel pipe
192.111 Design factor (F) for steel pipe
192.112 Additional design requirements for steel pipe using alternative maximum allowable operating pressure
192.113 Longitudinal joint factor (E) for steel pipe
192.115 Temperature derating factor (T) for steel pipe
192.121 Design of plastic pipe
192.123 Design limitations for plastic pipe
192.125 Design of copper pipe
192.141 Scope
192.143 General requirements
192.144 Qualifying metallic components
192.145 Valves
192.147 Flanges and flange accessories
192.149 Standard fittings
192.150 Passage of internal inspection devices
192.151 Tapping
192.153 Components fabricated by welding
192.155 Welded branch connections
192.157 Extruded outlets
192.159 Flexibility
192.161 Supports and anchors
192.163 Compressor stations: Design and construction
192.165 Compressor stations: Liquid removal
192.167 Compressor stations: Emergency shutdown
192.169 Compressor stations: Pressure limiting devices
192.171 Compressor stations: Additional safety equipment
192.173 Compressor stations: Ventilation
192.175 Pipe-type and bottle-type holders
192.177 Additional provisions for bottle-type holders
192.179 Transmission line valves
192.181 Distribution line valves
192.183 Vaults: Structural design requirements
192.185 Vaults: Accessibility
192.187 Vaults: Sealing, venting, and ventilation
192.189 Vaults: Drainage and waterproofing
192.191 Design pressure of plastic fittings
192.193 Valve installation in plastic pipe
192.195 Protection against accidental overpressuring
192.197 Control of the pressure of gas delivered from high-pressure distribution systems
192.199 Requirements for design of pressure relief and limiting devices
192.201 Required capacity of pressure relieving and limiting stations
192.203 Instrument, control, and sampling pipe and components
192.221 Scope
192.225 Welding procedures
192.227 Qualification of welders and welding operators
192.229 Limitations on welders and welding operators
192.231 Protection from weather
192.233 Miter joints
192.235 Preparation for welding
192.241 Inspection and test of welds
192.243 Nondestructive testing
192.245 Repair or removal of defects
192.271 Scope
192.273 General
192.275 Cast iron pipe
192.277 Ductile iron pipe
192.279 Copper pipe
192.281 Plastic pipe
192.283 Plastic pipe: Qualifying joining procedures
192.285 Plastic pipe: Qualifying persons to make joints.
192.287 Plastic pipe: Inspection of joints
192.301 Scope
192.303 Compliance with specifications or standards
192.305 Inspection: General
192.307 Inspection of materials
192.309 Repair of steel pipe
192.311 Repair of plastic pipe
192.313 Bends and elbows
192.315 Wrinkle bends in steel pipe
192.317 Protection from hazards
192.319 Installation of pipe in a ditch
192.321 Installation of plastic pipe
192.323 Casing
192.325 Underground clearance
192.327 Cover
192.329 Additional construction requirements for steel pipe using alternative maximum allowable operating pressure
192.351 Scope
192.353 Customer meters and regulators: Location
192.355 Customer meters and regulators: Protection from damage
192.357 Customer meters and regulators: Installation
192.359 Customer meter installations: Operating pressure
192.361 Service lines: Installation
192.363 Service lines: Valve requirements
192.365 Service lines: Location of valves
192.367 Service lines: General requirements for connections to main piping
192.369 Service lines: Connections to cast iron or ductile iron mains
192.371 Service lines: Steel
192.373 Service lines: Cast iron and ductile iron
192.375 Service lines: Plastic
192.377 Service lines: Copper
192.379 New service lines not in use
192.381 Service lines: Excess flow valve performance standards
192.383 Excess flow valve installation
192.385 Manual service line shut-off valve installation
192.451 Scope
192.452 How does this subpart apply to converted pipelines and regulated onshore gathering lines?
192.453 General
192.455 External corrosion control: Buried or submerged pipelines installed after July 31, 1971
192.457 External corrosion control: Buried or submerged pipelines installed before August 1, 1971
192.459 External corrosion control: Examination of buried pipeline when exposed
192.461 External corrosion control: Protective coating
192.463 External corrosion control: Cathodic protection
192.465 External corrosion control: Monitoring
192.467 External corrosion control: Electrical isolation
192.469 External corrosion control: Test stations
192.471 External corrosion control: Test leads
192.473 External corrosion control: Interference currents
192.475 Internal corrosion control: General
192.476 Internal corrosion control: Design and construction of transmission line
192.477 Internal corrosion control: Monitoring.
192.479 Atmospheric corrosion control: General
192.481 Atmospheric corrosion control: Monitoring
192.483 Remedial measures: General
192.485 Remedial measures: Transmission lines
192.487 Remedial measures: Distribution lines other than cast iron or ductile iron lines
192.489 Remedial measures: Cast iron and ductile iron pipelines
192.490 Direct assessment
192.491 Corrosion control records
192.501 Scope
192.503 General requirements
192.505 Strength test requirements for steel pipeline to operate at a hoop stress of 30 percent or more of SMYS
192.507 Test requirements for pipelines to operate at a hoop stress less than 30 percent of SMYS and at or above 100 p.s.i. (689 kPa) gage
192.509 Test requirements for pipelines to operate below 100 p.s.i. (689 kPa) gage
192.511 Test requirements for service lines
192.513 Test requirements for plastic pipelines
192.515 Environmental protection and safety requirements
192.517 Records
192.551 Scope
192.553 General requirements
192.555 Uprating to a pressure that will produce a hoop stress of 30 percent or more of SMYS in steel pipelines
192.557 Uprating: Steel pipelines to a pressure that will produce a hoop stress less than 30 percent of SMYS: plastic, cast iron, and ductile iron pipelines
192.601 Scope
192.603 General provisions
192.605 Procedural manual for operations, maintenance, and emergencies
192.609 Change in class location: Required study
192.611 Change in class location: Confirmation or revision of maximum allowable operating pressure
192.612 Underwater inspection and reburial of pipelines in the Gulf of Mexico and its inlets
192.613 Continuing surveillance
192.614 Damage prevention program
192.615 Emergency plans
192.616 Public awareness
192.617 Investigation of failures
192.619 Maximum allowable operating pressure: Steel or plastic pipelines
192.620 Alternative maximum allowable operating pressure for certain steel pipelines
192.621 Maximum allowable operating pressure: High-pressure distribution systems
192.623 Maximum and minimum allowable operating pressure; Low-pressure distribution systems
192.625 Odorization of gas
192.627 Tapping pipelines under pressure
192.629 Purging of pipelines
192.631 Control room management
192.701 Scope
192.703 General
192.705 Transmission lines: Patrolling
192.706 Transmission lines: Leakage surveys
192.707 Line markers for mains and transmission lines
192.709 Transmission lines: Record keeping
192.711 Transmission lines: General requirements for repair procedures
192.713 Transmission lines: Permanent field repair of imperfections and damages
192.715 Transmission lines: Permanent field repair of welds
192.717 Transmission lines: Permanent field repair of leaks
192.719 Transmission lines: Testing of repairs
192.721 Distribution systems: Patrolling
192.723 Distribution systems: Leakage surveys
192.725 Test requirements for reinstating service lines
192.727 Abandonment or deactivation of facilities
192.731 Compressor stations: Inspection and testing of relief devices
192.735 Compressor stations: Storage of combustible materials
192.736 Compressor stations: Gas detection
192.739 Pressure limiting and regulating stations: Inspection and testing
192.740 Pressure regulating, limiting, and overpressure protection-Individual service lines directly connected to production, gathering, or transmission pipelines
192.741 Pressure limiting and regulating stations: Telemetering or recording gauges
192.743 Pressure limiting and regulating stations: Capacity of relief devices
192.745 Valve maintenance: Transmission lines
192.747 Valve maintenance: Distribution systems
192.749 Vault maintenance
192.751 Prevention of accidental ignition
192.753 Caulked bell and spigot joints
192.755 Protecting cast-iron pipelines
192.801 Scope
192.803 Definitions
192.805 Qualification program
192.807 Recordkeeping
192.809 General
192.901 What do the regulations in this subpart cover?
192.903 What definitions apply to this subpart?
192.905 How does an operator identify a high consequence area?
192.907 What must an operator do to implement this subpart?
192.909 How can an operator change its integrity management program?
192.911 What are the elements of an integrity management program?
192.913 When may an operator deviate its program from certain requirements of this subpart?
192.915 What knowledge and training must personnel have to carry out an integrity management program?
192.917 How does an operator identify potential threats to pipeline integrity and use the threat identification in its integrity program?
192.919 What must be in the baseline assessment plan?
192.921 How is the baseline assessment to be conducted?
192.923 How is direct assessment used and for what threats?
192.925 What are the requirements for using External Corrosion Direct Assessment (ECDA)?
192.927 What are the requirements for using Internal Corrosion Direct Assessment (ICDA)?
192.929 What are the requirements for using Direct Assessment for Stress Corrosion Cracking (SCCDA)?
192.931 How may Confirmatory Direct Assessment (CDA) be used?
192.933 What actions must be taken to address integrity issues?
192.935 What additional preventive and mitigative measures must an operator take?
192.937 What is a continual process of evaluation and assessment to maintain a pipeline's integrity?
192.939 What are the required reassessment intervals?
192.941 What is a low stress reassessment?
192.943 When can an operator deviate from these reassessment intervals?
192.945 What methods must an operator use to measure program effectiveness?
192.947 What records must an operator keep?
192.949 How does an operator notify PHMSA?
192.951 Where does an operator file a report?
192.1001 What definitions apply to this subpart?
192.1003 What do the regulations in this subpart cover?
192.1005 What must a gas distribution operator (other than a master meter or small LPG operator) do to implement this subpart?
192.1007 What are the required elements of an integrity management plan?
192.1009 What must an operator report when a mechanical fitting fails?
192.1011 What records must an operator keep?
192.1013 When may an operator deviate from required periodic inspections under this part?
192.1015 What must a master meter or small liquefied petroleum gas (LPG) operator do to implement this subpart?