# Baker Hughes — Hazardous Materials Safety Interpretation

**Citation:** 03-0039  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2003-03-19

03-0039 response to Baker Hughes concerning 173.22.

## Document text

<<<PAGE 1>>>

Washington, D.G. 20590
400 Seventh St., S.W.
WAR 19 2008
Mr. John W. Miggins
Product Safety/Transportation Specialist
Reference No.: 03-0039
Baker Hughes
12645 West Airport Boulevard
Sugar Land, Texas 77478-5050
Dear Mr. Miggins:
This is in response to your letter requesting clarification of the packaging requirements in
§ 173.226(b) under the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180).
Division 6.1, Packing Group I, Hazard Zone A material. You state that the DOT 4BW cylinder
Specifically, you ask if a 54 gallon DOT 4BW cylinder may be used as an inner packaging for a
meets or exceeds the performance standards of a 1A1 steel drum which is an authorized inner
packaging.
The answer is no. Section 173.226(b) does not authorize a DOT 4BW cylinder as an inner
packaging. The drums authorized as inner packagings in § 173.226(b), as well as the outer
at the Packing Group I performance level. A DOT 4BW cylinder is manufactured to a specific
drums, must conform to the performance test requirements of subpart M of part 178 of the HMR
design specification instead of a performance standard. Therefore, use of a DOT 4BW cylinder
as the inner packaging of a UN 1A1 drum for a Hazard Zone A material must be authorized
I trust this satisfies your inquiry.
Sincerely,
Hotte z. mithall
Hattie L. Mitchell
Chief, Regulatory Review and Reinvention
Office of Hazardous Material Standards
030039
113722
35202

<<<PAGE 2>>>

1-12-03
02:17pm
From-Baker Patrolite
281 275 7209
T-311 P.002/002 F-950
Corbin
3173,226 (b)
Packuging Specs
BAKER
HUGHES
Baker Petrolite
03-0039
P. O. Box 5050
February 12, 2003
Tel 281-276-5400
Sugar Land, Texas 77478-5050
Mr. Edward T. Mazzullo
Fax 281-275-7385
Director, Office of Hazardous Materials Standards
400 7th Street S.W.
U.S. DOT/RSPA (DHM-10)
Washington, D.G. 20590-0001
Mr. Mazzullo:
great deal of debate among my colleagues regarding the use of a 54 gallon 4BW
I am requesting a letter of interpretation regarding 173.226(b). There has been a
Cylinder as an inner drum to be over packed with a customized drum
regulation that will explain whether or not we can utilize a welded cylinder that
manufactured to 1A2 specifications. We are seeking interpretation of the above
may meet or exceed the safety requirements of a 1A1 drum as an inner drum to
be over packed in a 1A2 drum; thus would be exempt from the requirements in
173.226(a).
Please fax me (281-275-7385) or email me (john.miggins@bakerpetrolite.com)
your letter of interpretation.
Thank You,
John W. Miggins
Product Safety/Transportation Specialist

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2003/030039.pdf>
- Source ID: `phmsa`
- SHA-256: `dc081606722813cf0252d54523bdd58e8d8047090705e7c39a51356b5d8d8e66`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-22T11:44:24.636Z
- Document slug: `phmsa-interpretation-03-0039`

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