Flowserve IJ, Installation Operation & Maintenance

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IJ PUMP OPERATION AND MAINTENANCE MANUAL
xvii BO2660-01
TORQUE PROCEDURE
SINGLE ROW HEAD-TO-CASE BOLTING
METAL-TO-METAL GASKETED JOINTS
1. Clean and inspect each stud or bolt, nut, washer, and the facing on the flanges against which
the nuts will rotate. Look for severe galling, pitting, etc. If any of the above mentioned items
are damaged beyond repair, replace that item.
2. Lubricate all thread contact areas and nut facings. There are many suitable lubricants
available on the market today (i.e. Fel-Pro N-5000, Never-Seize) that can be selected to
provide the necessary low friction for installation and adequate anti-seize properties for high
temperature applications.
3. Before torquing the studs or bolts, number each stud or bolt by following the circumferential
numbering order for the appropriate bolt pattern shown in the following chart.
4. Torque the studs or bolts to 30 percent of the final torque required listed in the following
tables, following the sequence printed on the studs or bolts. If this sequence is not followed,
the flanges can be cocked, resulting in joint leakage and possible component damage.
5. Repeat step 4, increasing torque to approximately 60 percent of the final torque required.
6. Repeat step 4, increasing torque to 100 percent of final torque required.
7. Continue torquing the studs or bolts to 100 percent of final torque required, in the sequence
printed on the studs or bolts, until no further rotation of the nuts can be achieved. This may
require several retorquings since as one stud is torqued it will relieve the stress on the
adjacent stud until an equilibrium has been achieved.
8. On high-pressure, high-temperature applications, it is recommended that the flange be
retorqued to 100 percent of torque required after 24 hours at operating temperature and
pressure to compensate for any relaxation that may have occurred.
TORQUE PROCEDURE
PUMP FOOT HOLDDOWN BOLTS
1. Clean and inspect each stud or bolt, nut, washer, and the facing on the flanges against which
the nuts will rotate. Look for severe galling, pitting, etc. If any of the above mentioned items
are damaged beyond repair, replace that item.
2. Lubricate all thread contact areas and nut facings. There are many suitable lubricants
available on the market today (i.e. Fel-Pro N-5000, Never-Seize) that can be selected to
provide the necessary low friction for installation and adequate anti-seize properties for high
temperature applications.
3. Determine which end of the pump is fixed to its foundation with an alignment dowel and
which end has an expansion dowel which allows thermal expansion of the case. (This
information may be obtained from the OUTLINE drawing in the back of this manual or from
your plant data file.)
4. Evenly torque the pump foot holddown bolts on the end of the pump which is fixed to the
foundation to the 100% final torque value listed below.
5. Tighten the other pump foot holddown bolts until the spring washers on the bolts are flat, and
no further.