| 摘要 |
An improved safety device, for oil and gas installations, includes one or more conduits for the transport of oil and/or gas, and one or more valves, where the safety system includes a freezing device, which can be provided substantially around a conduit and/or a valve, where 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. |
