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Section §192.111: Design factor (F) for steel pipe

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 192.111 on the ECFR website

Interpretation Responses

Ref ID Date Company Name Individual Name Response Document
PI-92-003 Gas del Estado Jose Hugo Muraco View
PI-72-0108 Minister of Roads & Communications Mr. Hassan Shalchian View
PI-75-059 Williams Brothers Engineering Company J. L. Williams View
PI-70-0108 Public Service Commission Mr. F. M. Hoppe View
PI-72-0101 Iowa State Highway Commission Mr. William P. Davis View
PI-70-005 Public Service Commission F. M. Hoppe View
PI-76-082 OPSO Advisory Bulletin View
PI-73-030 James H. Collins View
PI-73-026 Panhandle Eastern Pipe Line Company Chas. H. Kent View
PI-72-0107 Flordia Gas Company Mr. J. E. Hansford View
PI-75-024 Oklahoma Natural Gas Company J. H. Glamser View
PI-80-017 Venart Industries Limited J. K. Campbell View
PI-77-013 Department of Transportation, Frankfort, KY N. W. Coomes View