Chapter 17. Operating Methods

[P]eople place their faith in systems either because they're new (so they simply must be good) or because they're old and have worked a long time.—Wendy Grossman, Daily Telegraph (London), July 29, 1997

This chapter describes some accidents that occurred because operating procedures were poor. It does not include accidents that occurred because of defects in procedures for preparing equipment for maintenance or vessels for entry. These are discussed in Chapters 1, 11, 23, and 24.

17.1. Trapped Pressure

Trapped pressure is a familiar hazard in maintenance operations and is discussed in Section 1.3.6. Here we discuss accidents that have occurred as a result of process operation.

Every day, in every plant, equipment ...

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