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Section §173.25: Authorized packagings and overpacks

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 173.25 on the ECFR website

Interpretation Responses

Ref ID Date Company Name Individual Name Response Document
24-0010 AMETEK AMERON Patrick Schoenhoff View
23-0055 Amazon Inc. Mr. Josh Galvarino View
22-0107 Roadrunner Transportation System LLC Mr. Karl Kronau View
22-0046 Entegris Inc. Jim McManus View
21-0094 Scopelitis, Garvin, Light, Hanson & Feary, P.C. Timothy W. Wiseman View
21-0052 Amazon Marianna Patterson View
20-0076 Packgen Keith Russ View
20-0065 Leslie’s Poolmart, Inc. Mike Jennings View
20-0009 Veolia North America Ms. Jennifer Fletcher View
20-0048 SorbTech, Inc. Joanna Kilburn View
19-0089 Uniweld Products, Inc. Janet Beets View
19-0013 Hunter Fan Company Tony Bacon View
18-0027 Veolia North America Ms. Jennifer Eberle View
12-0116 The Valspar Corporation Mr. Eric Barcaskey View
03-0278 URS Corporation Mr. Andrew N. Romach View
13-0171 Aerospace Mr. Jeff Christafore View
01-0149 Epichem Incorporated Mr. Brian McCarthy View
12-0249 Praxair Distribution, Inc. Mr. David B. Sonnermann View
98-0515 Autoliv ASP, Inc. Mr. Terry Zost View
13-0163 Green Bay Packaging Inc. – Fremont Divisio Mr. Lance Lycourt View
00-0248 H&G Inspection Company, Inc. Mr. Craig Konieczny View
12-0172 Detector Electronics Corporation Mr. Lee R. Zwiefelhofer View
98-0330 Mainstream Engineering Corp. Mr. Lawrence R. Grzyll View
00-0333 California Loss Control Mr. Michael V. Nicholas View
13-0171 Aerospace Mr. Jeff Christafore View
07-0138 HAZ-MAT Transportation Services Mr. Jack Peters View
15-0056 Regulatory Resources, Inc. Mr. W.A. Winters View
08-0221 URS Corporation Ms. Erin N. Jarman View
14-0204 Lockheed Martin Space Systems Compnay, SWFLANT Ms. Amanda B. Foskey View
16-0039 GEO Dynamics Inc. Mr. Brett Lehman View
13-0241 S.C. Johnson & Son, Inc. Ms. Georgia Barr View
11-0212 View
06-0173 Schlumberger, Ltd. Mr. Paul Lezak View
05-0052 Duratek Training Services Ms. Kathryn Pacha View
10-0144 MAR COR PURIFICATION Mr. Rollie Weberg View
10-0149 Minnesota Department of Transportation Mr. Mike Ritchie View
98-0414 Hazmateam, Inc. Mr. Leo Traverse View
14-0195 The Clorox Company Mr. Maurice C. Carson View
07-0162 Reckitt Benckiser, Inc. Mr. Richard Hessen View
16-0160 URS Corporation Mr. Andrew Romach View
15-0171 AECOM Mr. Andrew Romach View
04-0128 Valspar Mr. Eric Barcaskey View