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Interpretation Response #06-0064 ([Catalina Cylinders] [Mr. E.A. Ward Dekker, Jr])

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

Interpretation Response Details

Response Publish Date:

Company Name: Catalina Cylinders

Individual Name: Mr. E.A. Ward Dekker, Jr

Location State: CA Country: US

View the Interpretation Document

Response text:

May 23, 2006

 

Mr. E.A. Ward Dekker, Jr.                Reference No. 06-0064
QA Manager
Catalina Cylinders
12452 Monarch Street
Garden Grove, California 92841

Dear Mr. Dekker:

This responds to your inquiry (facsimile) regarding the manufacture of a DOT 3AL cylinder for oxygen enriched air, air with oxygen content greater than 22-23%, under the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180).

Your questions are paraphrased and answered as follows:

Q1. Do aluminum cylinders for oxygen enriched air have to conform to § 173.302(b)?

Al. Gas mixtures with oxygen concentrations greater than 23.5% should be considered to cause or contribute to combustion of other material to a greater extent than air. These gas mixtures must be described as “Compressed gas, oxidizing, n.o.s.” and must be classified and labeled with a Division 2.2 (nonflammable gas) primary hazard and a Division 5.1 (oxidizer) subsidiary hazard. If the oxygen concentration is greater than 23.5%, then the conditions specified in § 173.302(b) must be met.

Q2. Must a residual hydrocarbon test be performed?

A2. Yes. The cylinders must conform to the cleanliness standards in Federal Specification RR-C 901C, paragraph 4.4.2.2.

Q3. Must the cylinder be designed to a maximum service pressure of 3000 psi?

A3. No, the cylinder may have a higher marked service pressure. The pressure in each cylinder may not exceed 3000 psi at a temperature of 21°C (70°F). Also, see
§ 173.301(a)(8).

I hope this satisfies your inquiry. If we can be of further assistance, please contact us.

Sincerely,

 

John A. Gale
Chief, Standards Development
Office of Hazardous Materials Standards

173.302(b)

Regulation Sections