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What do the UN codes mean?
Article Title: What do the UN codes mean?
Article Summary: General information on understanding UN codes.
Article Date: 11/15/2007
Article ID: 743
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Many of our products such as our drums and carboys meet UN specifications. Here is some information on how these codes work.
Example code: UN 1H1/Y/1.9/100/07 USA M-4152 for a Plastic Closed Head Drum
UN 1H1 Y 1.9 100 07 USA M-4152
United Nations Symbol Packaging Code Performance Level Specific gravity Hydrostatic Test Pressure Year of Manufacture Country of Authorization Manufacturers Symbol & Identification Number
Example code: UN 1H2/Y250/S/07 USA M-4152 for a Plastic Open Head Drum
UN 1H2 Y 250 S 07 USA M-4152
United Nations Symbol Packaging Code Performance Level Gross Mass Solids (KGS) Year of Manufacture Country of Authorization Manufacturers Symbol & Identification Number
United Nations Symbol: A lower case "u" over a lower case "n" in a circle or upper case "UN" signifies that a container is UN performance packaging.
Packaging Code: the first number designates the type of packaging, the letter designates the material of construction, and the second number designates whether it is open top or closed top.
Packaging Codes
1 – Drum A - Steel 1 – Tight Head (non removable head)
2 – Wooden Barrel B – Aluminum 2 – Open head (removable head)
3 – Jerrican C – Natural Wood
4 – Box D - Plywood
5 – Bag F – Reconstituted Wood
6 – Composite Packaging G – Fiberboard
7 – Pressure Receptacle H – Plastic Material
L – Textile
M – Paper, Multi-wall
N – Metal ( other than steel or aluminum)
P – Glass, Porcelain, Stoneware
Performance Level: Identifies the performance standard of the package. X – For packages meeting Packing Group I tests – highest hazard; may also be used for P.G. II and P.G. III Y – For packages meeting Packing Group II tests – medium hazard; may also be used for P.G. III Z – For packages meeting Packing Group III tests – lowest hazard.
Specific Gravity: Maximum specific gravity that the container can hold. When the specific gravity designation is not marked, the maximum permitted specific gravity is 1.2.
Gross Mass: Maximum gross mass in kilograms.
Hydrostatic Pressure: Test pressure in kilopascals.
Solids: Solid or combination packing designation.
Year of Manufacture: Last two digits in the year of manufacture. Plastic Drums and Jerricans/Pail (1H and 3H) must also be marked with the month of manufacture.
State Authorizing Allocation Mark: Designation code for country where container is manufactured and/or marked or reconditioned for re-use.
Name of Manufacturer and Registration Number: Authorized symbol of packaging manufacturer or reconditioner, as assigned by the U.S. Department of Transportation (DOT).
Minimum Wall Thickness: Expressed in millimeters. Minimum for plastic re-usable drums is 2.2 mm for a 120-220 liter container; minimum for steel re-usable drums is 1.0 mm.


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