| Cyril
W Bishop Engineering
Services Ltd
Heat flux monitoring for pipefreezing safety |
Heat-flux monitoring
gives ultimate safety and assurance in critical applications:
|
| "Is it ready yet
?"
When attempting to freeze small pipes, this question can usually be answered by our technicians, based on their experience, and various observable physical signs. With larger pipes, it becomes a little more difficult to answer. Quite often, the physical signs may be indicative of a complete ice plug, but another means of testing is required. In many cases, a physical test point is either present, or can be introduced into the system. Heat-flux measurement gives us a non-invasive means of monitoring the development of an ice-plug during a pipefeezing operation, tells us when a complete plug has been formed, and allows us to monitor the condition of the complete plug during any subsequent pipework intervention. On large scale pipefreezing jobs, it is also possible to detect any flow in the system, and determine its direction. Heat-flux monitoring is carried out by attaching heat-flux gauges to the outer pipe surface within the cooling region. These gauges measure the amount of heat being drawn out of the pipe by the liquid nitrogen in the jacket. The amount of heat that can leave the pipe is related to the pipe contents, and the amount of ice that has been formed within the pipe, and from these measurements we can deduce the state of the plug and detect the presence of flow. We believe that Cyril
W Bishop Engineering
is the only company in the world that can offer the
full benefits of heat-flux measurement technology.
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