ANSI HI 2.6:2000 pdf download.Vertical Pump Tests.
ANSI HI 2.6 is limited to the testing of vertical diffuser type centrifugal pumps with clear water. The tests conducted under these standards shall be made and reported by qualified personnel.
ANSI HI 2.6 applies to tests of the pump only, unless stated otherwise.
The type of test(s) performed, and the auxiliary equipment to be used, should be agreed upon by the purchaser and manufacturer prior to the test.
It is not the intent of this standard to limit or restrict tests to only those described herein. Variations in test procedures may exist without violating the intent of this standard. Exceptions may be taken if agreed upon by the parties involved without sacrificing the validity of the applicable parts of this standard.
2.6.1.1 ObjectIve
This standard is intended to provide uniform procedures for hydrostatic, hydraulic, and mechanical performance testing of vertical pumps and recording of the test results. This standard is intended to define test procedures which may be invoked by contractual agreement between a purchaser and manufacturer. It is not intended to define a manufacturer’s standard practice.
2.6.2 Types of tests
This standard describes the toilowing tests:
a) Performance test to demonstrate hydraulic and mechanical integrity;
Optional tests as follows when specified:
b) Hydrostatic test of pressure-containing components;
C) Net positive suction head required test (NPSHR test);
d) Mechanical test.
For airborne sound testing see HI 9.1—9.6-2000,
Pumps — General Guidelines.
2.6.2.1 Test conditions
Unless otherwise specified, the rate of flow, head, eff Iciency, NPSHR and priming time are based on shop tests using water corrected to 20°C (68°F). If the facility cannot test at rated speed because of limitations in power, electrical frequency, or available speed changers, the pump may be tested at between 50% and 200% of rated speed.
2.6.3 Terminology
The following terms are used to designate test parameters or are used in connection with pump testings.
2.6.3.1 Symbols
See Table 2.11.
2.6.3.2 Subscripts
See Table 2.12.
2.6.3.3 Specified condition point
Specified condition point is synonymous with rated condition point.
2.6.3.4 Rated condition point
Rated condition point applies to the rate of flow, head, speed, NPSH and power of the pump as specified by the purchase order.
2.6.3.5 Normal condition point
Normal condition point applies to the rate of flow, head, speed, NPSH and power at which the pump will normally operate. It may be the same as the rated condition point.
2.6.3.6 Best efficiency point (BEP)
The rate of flow and head at which the pump efficiency (i,) is a maximum.
2.6.3.7 Shut off (SO)
The condition of zero flow where no liquid is flowing through the pump.
2.6.3.8 Volume
The unit of volume shall be one of the following.ANSI HI 2.6 pdf download.