Page 66 - Improving Machinery Reliability

38 Improving Machinery Reliability

Table 1-2
Cost Analysis for Compression Systems
Motor-Driven Three Gas-Engine
Centrifugal Driven Reciprocating Compressors

Horsepower input 9200 7400 (2 machines running)
Piping system k5760 k$ I384
Foundation 404 1390
3-year cost of power 14904 11888
Barrel compressor 2464 -
Reciprocating compressor - 4440
Driver and gear I582 Included/NA
Switchgear 400 -
Fuel-supply facilities 400
Total k520.5 14 k$19,502
Maintenance: See Table 1-3 or use plant data
New Total

to the plant's technical staff in advance of plant startup. Machinery data and docu-
mentation packages often arrive too late to contribute to a successful plant startup.
Machinery then has to be commissioned, maintained, or repaired without proper
guidance and with inadequate planning.
Startup planning also involves installation completeness reviews." These reviews
are critically important in the chain of pre-commissioning events leading to success-
ful startup. They must be executed by following a checklist-type outline which
allows the reviewer to ascertain that all installation-related items defined in the job
specification have been furnished or executed. Unless the reviewer is following a
written checklist, the installation completeness review may be hit-and-miss, and
startup delays or costly failures could result.
Finally, there is documentation which is, indeed, needed only after the plant is on
stream. However, this documentation, too, should be obtained before the equipment
vendor is paid his final retention payment. Attempts to gather up the data sometime
later have often proven to be expensive, frustrating, or unsuccessful. Based on actual
experience, it is concluded that project teams should be given the responsibility of
obtaining these data. Representing the owner of the plant, the project team may elect
to have the design contractor put equipment vendors under contractual obligation to
provide important data on time and in usable format.

What Each Machinery Data File Should Contain

Efficient and accurate repair and troubleshooting of machinery requires good docu-
mentation. Also, it is important that plant maintenance and technical service person-
nel are given ready access to this documentation, be it in paper or electronic format.

*For coiiiprehensive information on this topic, see Bloch and Geitner, hfrodtctiori fo Mrrchirtery
Relinhilify Assessnienf, 2nd ed. Houston: Gulf Publishing Company.