All class 1 products have been assigned to a compatibility group, to make sure that certain types of explosives are never transported together. The compatibility group is shown by a capital letter. The asterisk is just a placeholder – it isn’t shown on a label or placard. Instead, the compatibility group letter appears.
The truth of the fact is this, if you actually handle, ship or transport certain types of explosives, you’ll need additional training. If time permits, one of the things we planned to cover over the next few series is how to load explosives of different compatibility groups.
Gases in class 2, like the propane are usually transported under pressure and can be extremely dangerous if the cylinder is damaged or punctured. Division 1 gases are flammable, and the vapours can ignite easily. Propane and butane can both be shipped under their own names and UN numbers, or as Liquefied petroleum gas, UN 1075. In actual fact, 2.2 gases are not flammable or toxic, but they’re still hazardous because they’re under pressure. All welders handling gases and propane need to have a very good understanding of transporting and handling of gases.
There’s a special label and placard for oxygen and other similar gases. The primary risk is Class 2.2 non-flammable and non-toxic. Did you know that Oxidization gases have a subsidiary risk of 5.1.? That is very correct. Flammable liquids in Class 3 are dangerous because their vapours can ignite and cause an explosion or intense fire. A product like gasoline can spread quickly over a large area. Flammable liquids are separated into packing groups to show the degree of danger. The packing group is determined by a combination of the flash point and the initial boiling point.
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