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

Interpretation Response #07-0154 ([American Cap Company] [Mr. Kerry Hricsina])

Below is the interpretation response detail and a list of regulations sections applicable to this response.

Interpretation Response Details

Response Publish Date:

Company Name: American Cap Company

Individual Name: Mr. Kerry Hricsina

Location State: PA Country: US

View the Interpretation Document

Response text:

Nov 5, 2007

Mr. Kerry Hricsina                                Ref. No. 07-0154

American Cap Company

15 Church Street

Wheatland, PA  16161

Dear Mr. Hricsina:

This is in response to your e-mail asking whether the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180) require the testing of cylinder valve caps.  Specifically, you ask whether the HMR require testing in accordance with the Compressed Gas Association publication, CGA V-9, "Standard for Compressed Gas Cylinder Valves."

Currently, the HMR do not incorporate by reference CGA V-9 or otherwise require the testing of cylinder valve caps.  However, § 173.40(c) requires that each plug or valve must be capable of passing the test pressure of the cylinder without damage or leaking.

In a notice of proposed rulemaking (HM-218E, 72 FR 18446; April 12, 2007), we proposed to incorporate by reference CGA V-9 into §§ 173.40 and 173.301.  We are reviewing the comments received in response to the notice, which also are available for public review at our website at under the Rules and Regulations icon. We expect to publish a final rule during the first quarter of 2008.

I hope this information is helpful.  If you have additional questions, please do not hesitate to contact this office.


Hattie L. Mitchell

Chief, Regulatory Review and Reinvention

Office of Hazardous Materials Standards

173.40, 173.301

Regulation Sections

Section Subject
173.301 General requirements for shipment of compressed gases and other hazardous materials in cylinders, UN pressure receptacles and spherical pressure vessels
173.40 General packaging requirements for toxic materials packaged in cylinders