USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation


Section §180.209: Requirements for requalification of specification cylinders

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 180.209 on the ECFR website

Interpretation Responses

Ref ID Date Company Name Individual Name Response Document
22-0067 Kidde Aerospace and Defense Mark Fazzio View
07-0166R CTC Certified Training Co. Darrel K. Garton View
21-0101 Hydro-Test Products, Inc. Carlos Graca View
21-0100 Hydro-Test Products, Inc. Carlos Graca View
21-0076 American Cylinder and Safety Myles L. TenBroeck View
21-0084 Koorsen Fire & Security Brick Keltner View
20-0086 Cylinder Sales and Testing, LLC d/b/a Coastal Hydrotesting Jeffery Strong View
20-0088 National Presto Safety J.R. Nerat View
19-0136 National Propane Gas Association Sarah Reboli View
19-0079 Entegris, Inc James McManus View
17-0094 Entegris Inc. Mr. James McManus View
14-0054 MAET Vacuum Lab-Honeywell International Mr. Kenneth Lillemo View
06-0276 Thunderbird Cylinder, Inc. Mr. Fred A. Nachman View
15-0042 Transport Canada, TDG Ms. Nida Chaudhary View
05-0218 City Carbonic Sales & Service Ms. Amy Morgan Bruecks View
13-0137 Western Sales and Testing, Inc. Mr. Mark Griffin View
14-0053 Department of the Air Force Mr. Brett Schlueter View
15-0184 The Chemours Company Mr. Randolph Martin View
05-0239 CTC Certified Training Co Mr. Darrell K. Garton View
07-0082 City Carbonic Sales & Service, Inc. Ms. Amy Morgan Bruecks View
06-0133 Global Fire and Safety, Inc. Mr. Bill McDonald  View
09-0177 Worthington Cylinder Corporation Mr. Steven T. Gentry View
12-0244 Airgas SAFECOR Mr. John Anderson View
13-0004 Airgas SAFECOR Mr. John Anderson View
08-0135 Safety & Compliance Associates, Inc. Mike Lopez, JD View
09-0236 Department of State INL/A Mr. James A. Sherman View
13-0092 Linde Gas North America LLC Mr. Guy Dalton View
12-0087 Hydro-Test Products, Inc. Mr. Tom Sauta View
13-0164 Mr. Cesar Enrico View
16-0147 Qantas Mr. Neil Smith View
11-0220 Foster Fuels, Inc. Mr. John George View
07-0117 City Carbonic Sales & Service, Inc. Ms. Amy Morgan Bruecks View
13-0032 Complete Cylinder Service, Inc. Mr. Paul Kleier, Jr. View
14-0067 Transport Canada, TDG Ms. Nida Chaudhary View
10-0019R Mr. John Cox View
10-0077 Thunderbird Cylinder Mr. Fred A. Nachman View