HSE-LS-12_Compressed_Gas_Safety.pdf

8/9/2019 HSE-LS-12_Compressed_Gas_Safety.pdf

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Classification of Hazardous MaterialsTheDOThas broadauthority toregulate hazardousmaterials thatarein transport, includingthediscretion todetermine whichmaterialsshallbe classified as"hazardous". These materials areplacedin oneof ninecategories,

based ontheir chemicaland physicalproperties. Based onthe classification of thematerial, theDOTis alsoresponsiblefor determiningtheappropriate packagingmaterialsfor shippingor transport. Finally, alsobased onthe

materialclassification, strictguidelines are furnishedfor proper labeling/marking of packages of hazardous materialsoffer ed for transport, and for placarding of transport vehicles.

Class 1: Explosives

Division 1.1 Explosives with a mass explosion hazard

Division 1.2 Explosives with a projection hazard

Division 1.3 Explosives with predominantly a fire hazard

Division 1.4 Explosives with no significant blast hazard

Division 1.5 Very insensitive explosives

Division 1.6 Extremely insensitive explosive articles

Class 2: Gases

Division 2.1 Flammable gases

Division 2.2 Nonflammable gases

Division 2.3 Poison gas

Division 2.4 Corrosive gases

Class 3: Flammable liquids.

Division 3.1 Flashpoint below -18oC (0oF)

Division 3.2 Flashpoint -18oC and above, but less than 23 oC (73oF)

Division 3.3 Flashpoint 23oC and up to 61oC (141oF)

Class 4: Flammable solids; spontaneously combustible materials; and materials that are dangerous when wet

Division 4.1 Flammable solids

Division 4.2 Spontaneously combustible materials

Division 4.3 Materials that are dangerous when wet

Class 5: Oxidizers and organic peroxides

Division 5.1 Oxidizers

Division 5.2 Organic peroxides

Class 6: Poisons and etiologic materials

Division 6.1 Poisonous materials

Division 6.2 Etiologic (infectious) materials

Class 7: Radioactive materials

Any material, or combination of materials, that spontaneously gives off ionizing radiation. It has a specific activity greater than 0.002

microcuries per gram.

Class 8: Corrosives

A material, liquid or solid, that causes visible dest ruction or irreversible alteration to human skin or a liquid that has a severe corrosion

rate on steel or aluminum.

Class 9: Miscellaneous

A material which presents a hazard during transport, but which is not included in any other hazard class (such as a hazardous

substance or a hazardous waste).

ORM-D: Other regulated material

A material which, although otherwise subjected to regulations, presents a limited hazard during transportation due to its form, quantit y


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HSE-LS-12_Compressed_Gas_Safety.pdf