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Section §193.2001: Scope of part

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 section 193.2001 on the ECFR website

Interpretation Responses

Ref ID Date Company Name Individual Name Response Document
PI-22-0018 XTO Energy, Inc. Mr. Jameson Gowin View
PI-21-0002 High Roller E&C, LLC Mr. Rob Harman View
PI-16-0010 Linde Engineering North America Mr. Georg H. Breuer View
PI-16-0011 Counsel to North Dakota LNG, LLC Mr. Greg H. Williams View
PI-84-0102 View
PI-95-008 Northern Eclipse, Inc. Raymond R. Latchem View
PI-02-0102 Common Wealth of Virginia View
PI-93-001 Memo: External Various View
PI-93-005 The Commonwealth of Massachusetts Department of Public Utilities Chris Bourne View
PI-98-002 James S. Stites View
PI-98-005 Williams Field Services Chris Mason View
PI-97-0100 Mr. Chuck Hudson Arizona Corporation Commission View
PI-77-027 Memo: Internal View