Steel
Gauge Tolerances For Steel Drum QC Evaluation
| ORNL Steel Gauge Tolerances For Steel Drum QC Evaluation |
| Issued: February 24, 1995 |
Revised: June 15, 1999 |
Page 1 of 1 |
Standard
For QC Inspections Of Gauge Thickness For Purchased
Steel Drums
The below table
of metal gauge thickness dimensions, and tolerances is
to be used when evaluating steel drums for compliance to
the specified steel thickness (gauge) set forth in the
ORNL Packaging Specifications for the purchase of steel
drums at ORNL facilities.This table is furnished, in that,
the US DOT Hazardous Material Regulations (49 CFR) under
the new UN Performance Packaging concept no longer specifies
gauge thickness and tolerances for steel drums - only test
criteria.
Oak
Ridge National Laboratory, however, in the ORNL UN Hazardous
Material Packaging Specifications, specifies specific steel
thickness (gauges) for the UN steel drums to be purchased,
as well as the required UN performance criteria. In addition,
the past DOT gauge table is incorporated directly into
the DOE "White Book" for the DOT 7A, Type A packaging.
| GAUGE
NUMBER
|
NOMINAL
THICKNESS
(Inches) |
NOMINAL
THICKNESS
(Millimeters) |
MINIMUM
THICKNESS
(Inches ) |
MINIMUM
THICKNESS
(Millimeters) |
| 12 |
0.1046 |
2.6568 |
0.0946 |
2.4028 |
| 14 |
0.0747 |
1.8974 |
0.0677 |
1.7196 |
| 16 |
0.0598 |
1.5189 |
0.0533 |
1.3538 |
| 18 |
0.0478 |
1.2141 |
0.0428 |
1.0871 |
| 19 |
0.0418 |
1.0617 |
0.0378 |
0.9601 |
| 20 |
0.0359 |
0.9119 |
0.0324 |
0.8230 |
| 22 |
0.0299 |
0.7595 |
0.0269 |
0.6833 |
| 24 |
0.0239 |
0.6071 |
0.0209 |
0.5309 |
| 26 |
0.0179 |
0.4547 |
0.0159 |
0.4039 |
| 28 |
0.0149 |
0.3785 |
0.0129 |
0.3277 |
NOTES:
The
above table of gauge values (in inches) were extracted
from the past DOT specifications; 49 CFR, & 173.24(a)(2)
(pre-HM 181) for steel sheets; for the gauges as specified
for DOT 17C, l7E, 17H, 37A, etc. steel drums.
Conversion
to millimeters is: inches multiplied by 25.4000 mm/in =
millimeters. [current 49 CFR, & 171.10
(c)(2)]
Minimum Thickness
for Reuse (reconditioning) is 1.1 millimeters (therefore,
above 19 gauge steel).
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