# CNDT, Inc. — Hazardous Materials Safety Interpretation

**Citation:** 02-0316  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2003-01-23

02-0316 response to CNDT, Inc. concerning 173.21.

## Document text

<<<PAGE 1>>>

U.S. Department
Research and
of Transportation
400 Seventh St., S.W.
Washington, D.C. 20590
›pecial Program:
ldministratior
JAN 2 3 2003
President
Mr. Ron Petty
Ref. No. 02-0316
801 Front Street
CNDT, Inc.
Arriba, co
80804
Dear Mr. Petty:
This is in response to your letter dated December. 9, 2002
regarding magnetized material shipped by air under the Hazardous
Material Regulations (HMR; 49 CFR Parts 171-180). Specifically,
less than, the level specified in $ 173:21 (d) is subject to
you asked whether a material with a magnetic field equal to, or
labeling or shipping paper requirements when shipped as air
cargo.
which has a magnetic field of more than 0.00525 gauss measured at
Section 173.21|d) forbids the carriage by aircraft of any package
magnetic or magnetized material does not meet the definition of
4.5 meters (15 feet) from any surface of the package.
threshold in S 173.21 (d), it is not subject to the HMR and may be
any hazard class and is packaged so it does not exceed the
shipped aboard any aircraft.
transportation by air the shipper may need to comply with the
If the material is offered for
International Civil Aviation Organization (ICAO) Technical
Instructions for the transportation of dangerous goods by
aircraft.
Sincerely,
.!..
Office of Hazardous Materials Standards
Transportation Regulations Specialist
173.21
020316

<<<PAGE 2>>>

2002.09:52 FAX 7197686100
0ffice Fax
4001
CERTIFIED NDT, INC.
BAH
801 FRONT STREET
8173. 214)
ARRIBA, COLORADO 80804
719-768-3464 719-768-6100 FAX
Pac casamy
wwww.certjfiedndt.com
02-
9 December 2002
Edward T. Mazzullo, Director
US DOT / RSPA (DHM-10)
Office of Hazardous Materials Standards
Washington D.C. 20550-0001
400 Seventh Street SW
Dear Mr. Mazzullo:
Earlier this morning, during a telephone conversation with one of your staff, he suggested that I request
an official reply from you concerning the matter described as follows:
We are a company providing nondestructive testing services to the mining, skiing, and petrochemical
limitations as stated in 49 CFR 173.21.d.
industries. Some of our components contain magnetized material. However, none of them exceed the
The staff representative who responded to my email inquiry affirmed that these components should not
be considered hazardous materials, and no special labeling or other documentation is required in order
for us:to transport these materials by air cargo means.
I am requesting a written response from you with the aforementioned pertinent points expressed.
Thank you very much for your assistance in this matter.
Sincerely,
President
Ron Petty.
CNDT Inc.

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2002/020316.pdf>
- Source ID: `phmsa`
- SHA-256: `243cc7600462940df29e572c3052314798ceaab9afb3168b95e2099da60bc4ba`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-22T22:28:07.686Z
- Document slug: `phmsa-interpretation-02-0316`

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