Legislation specific to SEVESO sites, including the amended order of 10 May 2000
Legislation on Pressure Equipment
Chlorine: ministerial order of 23/07/1977 (storage of over 18 tons) and its revised Circular of 29 October 2004
LFG: order of 9 November 1972 relative to the layout and operation of liquefied hydrocarbon depots, order of 9 November 1989 relative to the distancing conditions to which the permit authorisation for new liquefied flammable gas tanks is subject, order of 10 May 1993 relative to the storage of liquefied flammable gases under pressure etc.
Gas depots can be found at all levels of our day-to-day life, for example:
Depending on the nature of the gases stored, the facility can be subject to the legislation on classified installations in order to protect the interests referred to in article L 511-1 of the Environmental code.
This type of storage, notably the largest ones as in refineries, involves nearly all kinds of risks or nuisances (accidental risks, toxic and health risks etc.) for which the Inspectorate demands a response in proportion with the issues at stake.
Depending on their nature, these gases stored in liquid or gaseous form can have:
These gases can also be simply inert (nitrogen, argon, helium etc.), which does not exclude risks (risk of anoxia, excess pressure effects due to a container bursting, projection effect etc.).
Finally, when stored in cryogenic form, i.e. at very low temperatures (methane, nitrogen, hydrogen etc.), gases can pose burn risks.
2Special case of liquefied flammable gases (LFG)2
LFGs probably constitute the most frequently observed cases.
In order to prevent risks and improve existing situations, the first priority is to reduce the risk at source for which the Inspectorate of classified installations exerts constant pressure on the operators.
Several actions can be mentioned: