UN HAZARD CLASSIFICATION CODES (HCC)

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UN HAZARD CLASSIFICATION CODES (HCC)
C4 Slide 1
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Introduction

Hazard Division
Compatibility Groups
Hazard Classification Codes
Denotes the type of hazard to be expected
Denotes what can be stored together to minimise
risk
Facilitates safer storage and transportation
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Introduction to Hazard Divisions (HD)
The Hazard Division here is 1.1 It is also
shown with Compatibility Group, here it is
D Note that ammunition and its containers
generally has many other types of markings as
well.

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Class 1 Hazard Divisions (HD)

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Hazard Division 1.1

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Hazard Division 1.2

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Hazard Division 1.3

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Hazard Division 1.4

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Hazard Division 1.5

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Hazard Division 1.6

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Fire Divisions

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Compatibility Groups (CG)

• Identify commonalities between ammunition stores
• More importantly identify incompatible stores
• The CG is added to the HD to form the complete
• HAZARD CLASSIFICAITON CODE (HCC)
• The practical use of these is when applying the
  Mixing Rules

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CG Worked Example

• Compatibility Group B
• Articles containing a primary explosive substance
  and not containing two or more effective
  protective features
• Example Detonators

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CG B Detonators
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CG Worked Example

• Compatibility Group H
• Article containing both explosive substance and
  white phosphorus
• Example Incendiary Grenades.

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CG H Incendiary Grenades
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CG Worked Example

• Compatibility Group S
• Substance or article so packed or designed that
  any hazardous effects arising from accidental
  functioning are confined within the package
• Example Small Arms Ammunition
• (Ball)

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CG S Small Arms Ammunition
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CG Worked Example

• Compatibility Groups E and F
• Question - What is the difference?

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What are the Mixing Rules

• Compatibility Groups identify types of stock
• Theoretical ideal store each type individually
• Practically this is not likely to be viable
• Need to compromise mix suitable groups
• Aim to reduce the risk / to improve safety
• Mixing Rules state what can be stored with what

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Mixing Rules Table

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Mixing Rules for Field Storage

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Mixing Rules Table Field Storage

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Questions?
C4 Slide 24