# CP Industries — Hazardous Materials Safety Interpretation

**Citation:** 06-0104  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2006-05-12

06-0104 response to CP Industries concerning 178.35.

## Document text

<<<PAGE 1>>>

of Transportation
U.S. Department
Washington, D.C. 20590
400 Seventh Street, S.W.
Pipeline and
Hazardous Materials Safety
Administration
AY 1 2 200
CP Industries
1r. G. A. Hayden, P
Ref. No. 06-0104
2214 Walnut Street
McKeesport, PA 15132-7098
Dear Mr. Hayden:
This is in response to your April 21, 2006 letter requesting clarification regarding the
applicability of the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180) to
the marking of cylinders. Specifically, you ask if a DOT specification cylinder may
contain additional Chinese markings as displayed in your attached cylinder drawing.
cylinders provided they are made in low stress areas other than the sidewall, not of a size
The answer is yes. Section 178.35(f)(6) authorizes additional markings on specification
and depth that will create harmful stress concentrations, and do not conflict with any DOT
I hope this information is helpful.
Sincerely,
Hattie L. Mitchell, Chief
Office of Hazardous Materials Standards
Regulatory Review and Reinvention
178.35-
060104

<<<PAGE 2>>>

/ INDUSTRIES
2214 Walnut Street
A Division of Reunion Industries, Inc.
McKeesport, PA 15132-7098
Tel: 412-664-6604
satlerthwaite
April 21, 2006
9178.35
Ms. Hattie L. Mitchell
Markings
Chief, Regulatory Review and Reinvention
06-0104
Office of Hazardous Materials Standards
U.S. Department of Transportation
Research and Special Programs Administration
400 Seventh St., SW
Washington, DC 20590
Dear Ms. Mitchell,
CP Industries manufactures DOT ЗAA, 3AAX, and 3T containers in accordance with 49
CFR Parts 178.35, 178.36, and 178.45.
on the left end of the cylinder.
markings? (Particularly 178.35 (f)(1) (i), (ii), and (iv), and also 178.35 (f)(6))?
Does such a request violate any provisions of 49CFR Part 178.35 (f), which pertains to
Note that we would propose to locate the requested Chinese markings always on the
opposite end of the cylinder from the DOT required markings.
Your interpretation of the acceptability of the requested marking would be very much
appreciated.
Yours very truly,
CP INDUSTRIES
stander
/A. Hayden. F
Chief Metallurgist/ Director QA
The leader in pressure vessel technology since 1897

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2006/060104.pdf>
- Source ID: `phmsa`
- SHA-256: `7fd7bc7970de124d9d5eefd754b77b44924cf5923f0bf366fa90955294743c4c`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-24T03:42:45.214Z
- Document slug: `phmsa-interpretation-06-0104`

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