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Section §173.154: Exceptions for Class 8 (corrosive materials)

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 173.154 on the ECFR website

Interpretation Responses

Ref ID Date Company Name Individual Name Response Document
21-0110 Matson, Inc. Cliff Bartley View
18-0140 Thatcher Company Brent Olsen View
14-0018 URS Corporation Mr. Andy N. Romach View
03-0110 Laboratory Corporation of American Mr. Donald E. Horton, Jr. View
03-0085 Core Foam Mr. Richard Porter View
01-0145 ShipMate, Inc. Mr. Steven Hunt View
04-0150 The CapAnalysis Group, LLC Mr. George Kerchner View
10-0252 The Dow Chemical Company Ms. Cherry Burke View
08-0054 Paxton Company Mr. George Plum View
09-0296 Mansfield Consultants HK Ltd. Mr. Jeffrey Mansfield View
04-0084 Reagent Chemical & Research, Inc. Mr. Robert Dritschel View
06-0228 Northern Air Cargo, Inc. Mr. Mark Smith View
09-0204 Applied Cleaning Technologies, Inc. Mr. Paul A. Ackermann View
10-0139 FedEx Freight Ms. Sandra Richesin View
04-0044 Reagent Chemical & Research, Inc. Mr. Robert Dritschel View
08-0294 The Law Offices of Michael A. Capuzzi Mr. Michael A. Capuzzi, Esq. View