# Mr. Bob Thompson — Hazardous Materials Safety Interpretation

**Citation:** 05-0012  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2005-02-17

05-0012 response to Mr. Bob Thompson concerning 172.328, 172.334, 172.519.

## Document text

<<<PAGE 1>>>

of Transportation
J.S. Department
400 Seventh St., S.W.
Washington, D.C. 20590
Research and
Admint fratioams
FEB 17 2005
Mr. Bob Thompson
4200 Cairo Road |
United Propane Gas Companies, Inc.
Ref No.: 05-0012
Paducah, Kentucky 42002-2450
Dear Mr. Thompson:
This responds to your January 18, 2005 letter and subsequent telephone conversation with a
member of my staff requesting clarification of the Hazardous Materials Regulations (HMR;
49 CFR Parts 171-180). Specifically, you ask if the proper shipping name must be marked
on the outside of a cargo tank in addition to the required placards and identification number
markings for ammonia anhydrous and propane.
The answer is yes. A cargo tank containing a Class 2 material must be marked in
accordance with Part 172, Subpart D and placarded in accordance with Part 172, Subpart F.
A cargo tank containing a Class 2 material must be marked with the proper shipping name
specified in the Hazardous Materials Table (HMT; § 172.101), or an appropriate common
name for the material (e.g., "Refrigerant Gas") in accordance with § 172.328. However,
§ 172.328 provides an exception from the requirement to mark the proper shipping name or
common name on certain nurse tanks that are marked in accordance with § 173.315(m).
I hope this information is helpful. Please contact us if you require additional assistance.
Sincerely,
/ Chief, Standards Development
Office of Hazardous Materials Standards
172.328
172.334
172.519
050012

<<<PAGE 2>>>

kicheblaub
$172,334
$172.519
Placarding
05-0012
QUESTiONS ABOUT PLACARDiNA FOR PROPANE AND ANHydROUS AmMONIA
FOR PROPANE iS iT ALRiGHT To hAVE jusT N.N. 1075+ FLAMMABLE
GAs oN ALL 4sidES
4.N.1075)
FLAMMABLE
GAS
FoA ANHyOROuS AmmOniA iS iT ALAigHT To HAVE jUST N.N.
1005. NON-FLAMMABLE GAS ALL HSiDES AND INHALATION
HAZARA ON BOTH SIDES.
/u.N.1005)
NON-FLAMMABLE GAS
INHALATION HAZARD
FRom: BoB Thompson
PHonE: 270-442-5557 EXT 25
FAx: 270-444-6380

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2005/050012.pdf>
- Source ID: `phmsa`
- SHA-256: `24bb4eff8678611a26ff61bdc37e5d31013679491a9b4fe3d17f247637acc508`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-25T12:40:44.540Z
- Document slug: `phmsa-interpretation-05-0012`

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