| 摘要 |
The invention relates to an improved safety device, for oil and gas installations, which installations comprise one or more conduits for the transport of oil and/or gas, and one or more valves, wherein the safety system comprises a freezing device, which can be provided substantially around a conduit and/or a valve, wherein the freezing device cools the conduit and/or valve in such a way, preferably by using liquid nitrogen of freon, that the medium in the conduit and/or the valve freezes. |
