The primary steam reformer often ranks highly in plant risk assessments, due to complex damage mechanisms and large consequences of failure. However, the risk associated with the primary reformer is highly dependent on its operation. A balance exists between reliability and production, and in some cases it is necessary to operate close to limits. This may be either intentional (i.e. in order to maximise production), or simply a consequence of a separate issue (i.e. catalyst deactivation). In order to do
Source: NDT