06-02-2012, 11:08 PM
With regard to Compressed Gas cylinders, they all come under the Hazardous Materials Regulations and all gases and liquids have a United Nations Registered Number which is listed in the Hazmat daimond with the prefix U.N. No.
Even if a gas is inert, the fact that it is under such high compression inside the cyclinder means that it still presents a hazard during transport, handling and storage and as such still needs to be treated with respect.
The quantity and type of gases being transported determines which placards to display and also can have a major influence on the transport route. The reason they are prohibited from the tunnels is due to the added risks of fire and explosion that they pose should the vehicle become involved in an accident either directly or subsequently.
For example the road tunnels on the two tollways here in Melbourne have several signs of both the fixed and electronic type which display notices reminding drivers that placarded loads are not allowed in the tunnels and indicating which exits drivers of such loads should use to avoid entering the tunnels. Drivers who ignore the signs and drive placarded loads into the tunnels will be caught on surveilance cameras and then prosecuted by the police and Vic Roads.
Mark
Even if a gas is inert, the fact that it is under such high compression inside the cyclinder means that it still presents a hazard during transport, handling and storage and as such still needs to be treated with respect.
The quantity and type of gases being transported determines which placards to display and also can have a major influence on the transport route. The reason they are prohibited from the tunnels is due to the added risks of fire and explosion that they pose should the vehicle become involved in an accident either directly or subsequently.
For example the road tunnels on the two tollways here in Melbourne have several signs of both the fixed and electronic type which display notices reminding drivers that placarded loads are not allowed in the tunnels and indicating which exits drivers of such loads should use to avoid entering the tunnels. Drivers who ignore the signs and drive placarded loads into the tunnels will be caught on surveilance cameras and then prosecuted by the police and Vic Roads.
Mark
Fake It till you Make It, then Fake It some More