Page 77 - Improving Machinery Reliability

Requirements Specijkntion 49

Figure 1-35.Oil-mist lubrication summary.

installation Completeness Checklists

Rotating equipment has to be thoroughly checked out before it is ready for startup.
These completeness checks, customarily called “but-listing,” will ensure that the
actual installation complies with all applicable equipment specifications. For
instance, on a motor-driven centrifugal pump, completeness checks would incEude
installation-related items such as coupling alignment, baseplate grouting, seal flush
piping, and lubrication, and exclude design-related items such as impeller diameters
or seal material.
An installation completeness checklist must be reviewed and finally signed off by
the engineer, technician, or field inspector responsible for a given checkout task.
This list should take the place of more superficial hit-and-miss review efforts that
have traditionally resulted from verbal instructions and “checkout from memory.”
The development of written installation completeness checklists should be handled
by the engineering contractor or the owner’s project engineer. This task should not
prove difficult because virtually every checklist item can be picked off the detailed
job specifications used for a given project. Essentially, the task requires that these
job specifications be reviewed item by item and that requirements dealing with field
instulfufion of rotating machinery be transferred to the checklist in tabular format.
An example will serve to illustrate how installation completeness checklists were
developed for a major grassroots petrochemical project. Without these checklists, it
would not have been possible to entrust completeness reviews to contract mill-
wrights unfamiliar with the owner’s general practices and installation requirements.