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Section §173.315: Compressed gases in cargo tanks and portable tanks

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 173.315 on the ECFR website

Interpretation Responses

Ref ID Date Company Name Individual Name Response Document
22-0078 Crestwood Transportation Mr. Jared Sharp View
21-0051 Railsback Hazmat Safety Professionals, LLC Rex Railsback View
21-0038 Momentive Performance Materials Ms. Kirsten Pink View
21-0015 Iowa Dept. of Transportation Robert Johnson View
20-0040 Silverback Consulting Group LLC Michael Di Giorgio View
20-0013 Railsback Hazmat Safety Professionals LLC Mr. Rex Railsback View
19-0095 Hazmat Resources, Inc Daniel Shelton View
19-0047 Mr. Donald Brittingham View
18-0157 Landstar Transportation Logistics, Inc. Wes Pace View
05-0008 Mr. Ward Hildreth View
10-0120 Minnesota Department of Transportation Office of Freight and Commercial Vehicle Operations Mr. Michael Ritchie View
02-0079 BASE Engineering, Inc. William A. Quade View
07-0034 Georgia Department of Public Safety Captain Bruce Bugg View
12-0100 Hilti North America Mr. Brandon Kapple View
07-0032 Safety Division, Railroad Commission of Texas Mr. James. T. Osterhaus View
07-0219 Innovative Safety Solutions, Inc. Mr. Albert Calkin View
13-0140 Linden’s Propane Mr. Ray Anielski View
99-0260 Oklahoma LP Gas Administration Mr. Gary McDonald View
15-0080 Chemours Company FC, LLC Mr. Randolph Martin View
08-0215 Flash DOT Compliance Services Mr. Jaime Herrera View
00-0334 Railroad Commission of Texas Mr. Cleveland O'Brien View
10-0198 Smart-Hose Technologies Ms. Andrea Guevara View
08-0205 Mr. Andrew Abrams View
99-0248 Arizona Department of Public Safety Mr. Steve Herman View
14-0209 BASF Corporation Mr. Gregory R. Knauf View
02-0236 Browning Bushman P.C Loren G. Helmreich View
03-0284 Oklahoma Liquefied Petroleum Gas Administration Mr. W.A. Glass View
10-0189 Oak Point Service Mr. Jim Poulsen View
00-0036 Idaho State Police Trooper William I. Reese View
98-0596 Fort Edward Express Co., Inc. Mr. Douglas J. Varney View
16-0120 OneCIS Insurance Company Mr. Frank Hamtak View
12-0018 United Parcel Service (UPS) Mr. Bob Cogen View
11-0015 Mr. Richard Olson View
17-0026 Mr. John Hardridge View
12-0005 Global Passive Safety System Ltd. Mr. Andy Abrams View
11-0116 Land O"Lakes Purina Feed, LLC Mr. Paul A. Luther, P.E. View
99-0228 Texas Farm Bureau Mr. Ned Meister View
09-0123 HazMat Resoureces, Inc. Mr. Daniel G. Shelton View
10-0139 FedEx Freight Ms. Sandra Richesin View
12-0160 Donovan Marine, Inc. Mr. Keith Mauer View
16-0090 Texas Trailer Corporation Mr. Ray Williams View
16-0060 Ms. Tory Foster View
09-0245 Mr. Andrew Abrams View
11-0244 Arch Chemicals, Inc. Ms. Jennifer M. Daugherty View
08-0153 HazMat Resources, Inc. Mr. Daniel G. Shelton View
06-0172 Texas Railroad Commission View
08-0306 White River Distributors Mr. David Fulbright View
12-0203 Minnesota Department of Agriculture Mr. Ed Kaiser View
02-0005 Keehn Service Corporation Richard C. Willard View
02-0006 Railroad Commission of Texas Gas Services Division Richard L. Gilbert View
02-0029 Hazardous Materials Division, Federal Motor Carrier Safety Administration William Quade View
08-0273 Mr. Andrew Abrams View
11-0051 Reckitt Benckiser, Inc. Mr. Richard Hessen View