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Baker Hughes
© 2020 Baker Hughes Company. All rights reserved.
A. Service Parts Inventory
Planning
The basic objectives in formulating a service parts inventory
philosophy is to provide prompt valve service capability, thus
preventing maintenance outage time extensions. To accomplish
this, it is necessary to have immediate availability of the proper
inventory of service parts for optimum valve quantities. This
can be achieved at a minimum of cost by defining the inventory
on a frequency of need basis.
To assist towards this objective, Baker Hughes recommends
that the following guidelines be utilized to establish meaningful
inventory levels.
1. Identify the total number of valves in service by size, type
number, temperature class, and serial number.
2. Identify the frequency of replacement tendency of specific
parts.
Class I - parts most frequently replaced
Class II - parts less frequently replaced, but critical in the
event of an emergency requirement.
Class III - parts seldom replaced
Class IV - hardware (e.g. nuts, bolts, pins, cap
components, etc.)
Class V - parts practically never requiring replacement
3. "Need probability coverage" is defined as the probable
percent of total, uninterrupted operational time which can
be expected by stocking predetermined valve component
classifications. Determine “need probability coverage”
which is compatible with a specific company’s operational
objectives and service parts inventory investment
philosophy. Then relate “need probability coverage” to
parts classifications which will satisfy that need. Guidelines
are as listed in Table
17.
Table
17: Parts Classification
Parts
Classification
Need Probability Coverage
Class I
70 percent
Class II
85 percent
Class III
95 percent
Class IV
99 percent
4. Consult recommended spare parts list by valve type to
determine quantity of parts for valves to be covered by the
inventory plan.
5. Select parts and specify quantities.
B. Ordering Essentials
When ordering replacement parts, the order should state:
1. Part name
2. Part number (if known)
3. Quantity
4. Valve size
5. Valve type number
6. Valve serial number
7. When ordering spring assemblies, also state valve set
pressure and temperature.
Example of valve identification:
Type number: 3” (76.20 mm) 1910-30K/P1
Serial number: TD 07961
The correct part names can be obtained from Figure
1 thru
8. Other information may be obtained from the name plate
(see Figure
30 31 and 32). If the nameplate has been lost or
defaced, the serial number and valve type number can be
found stamped into the edge of the outlet flange.
XX. Replacement Parts Planning
