REP-3

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This document was adopted from API

3.1 General

3.1.1 Performance and NPSH testscentrifugal pumps) or HI 2.6 (for ve

not rating. Performance tolerances

3.1.2 If specified, at least 6 weeks

purchaser, for his review and com

optionaltests (3.4), including accep

3.1.3 Mechanical seals shall not be

or performance tests.

3.2 Hydrostatic test

3.2.1 All pressure-casing compone

times the maximum allowable wor

a) Double-casing pumps, horizontal

5.3.6), andother special design pu

b) Cooling passages and componen

coolers, shall be tested at a minim

c) Steam, cooling-water and lubric

maximum operating gauge pressur

d) The test liquid shall be at a temp

material being tested.

e) Gaskets used during hydrostatic

the same design as those to be sup

f) Hydrotesting is permitted withou

gland plate or seal chamber is usedrequirements as the pressure casin

,

UMP TEST PROCEDURE)

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shall be conducted using the methods of ISO 9rtical pumps), except that efficiency shall be fo

shall be in accordance with Table 14.

efore the first scheduled running test, the ven

ent, detailed procedures for all running tests

tance criteria for all monitored parameters.

used during the hydrostatic test but shall be us

ts shall be hydrostatically tested with liquid at

ing pressure, with the special provisions speci

multistage pumps, integral-gear pumps (as de

ps as approved by the purchaser may be segm

ts, including jackets for bearings, seal chamber

m gauge pressure of 1 000 kPa (10 bar) (150 p

ting-oil piping, if fabricated by welding, shall b

e or 1 000 kPa (10 bar) (150 psi), whichever is g

erature higher than the nil-ductility transition t

testing of an assembled pressure casing, less s

plied with the pump.

t the seal gland plate or seal chamber installed

, it shall be separately hydrotested to the sameg.

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06 grade 1, HI 1.6 (for information only and

or shall submit to the

nd all specified

ed during all running

a minimum of 1,5

ied below.

scribed inAPI-610 para

entally tested.

, oil coolers and seal

i).

tested at 1,5 times

reater.

emperature of the

al glands, shall be of

. If a cast material

pressure

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T

3.2.2 If the part tested is to operat

strength of that material at the tes

a factor obtained by dividing the althat at the rated operating temper

API 610 para5.3.4. For piping, the s

then be the minimum pressure at

list actual hydrostatic test pressure

NOTE For the purpose of this provi

3.2.3 The chloride content of liquid

mg/kg. To prevent deposition of ch

removed from tested parts at the c

NOTE Chloride content is limited in

3.2.4 Tests shall be maintained for

under pressure. The hydrostatic te

the pressure-containing parts are o

may require a longer testing period

Condition

Rated differential head:

0 m to 150 m (0 ft to 500 ft)

151 m to 300 m (501 ft to 1 0

> 300 m (1 000 ft)

Rated power

Rated NPSH

NOTE Efficiency is not a rating v

a If a rising head flow curve is speci

if the test curve still shows a rising c

b Under any combination of the abo

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UMP TEST PROCEDURE)

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ble 14 Performance tolerances

at a temperature at which the strength of a m

ing temperature, the hydrostatic test pressure

lowable working stress for the material at the tture. The stress values used shall be determin

tress shall conform to ISO 15649. The pressure

hich the hydrostatic test shall be performed.

s.

ion, ASME B31.3 is equivalent to ISO 15649.

s used to test austenitic stainless steel material

lorides as a result of evaporative drying, all resi

onclusion of the test.

order to prevent stress-corrosion cracking.

a sufficient period of time to permit complete

t shall be considered satisfactory if neither lea

bserved for at least 30 min. Large, heavy press

to be agreed upon by the purchaser and the v

Rated point

%

2

+ 5

00 ft) 2

+ 3

2

+ 2

+ 4

0

lue.

fied (see 5.1.13), the negative tolerance specified here sh

haracteristic.

ve (cumulative tolerances are not acceptable)

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aterial is below the

shall be multiplied by

sting temperature by d in accordance with

thus obtained shall

he data sheets shall

s shall not exceed 50

dual liquid shall be

xamination of parts

s nor seepage through

re-containing parts

ndor. Seepage past

Shutoff

%

+ 10

10a

+ 8

8a

+ 5

5a

all be allowed only

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internal closures required for testi

pressure are acceptable. Piping sys

ISO 15649. Gaskets used during hy

supplied with the casing.


3.2.5 The hydrostatic test liquid sh

the following conditions exists.

a) The liquid pumped has a relative

temperature.

b) The pumping temperature is hig

c) The casing is cast from a new or

d) The materials are known to hav

3.2.6 Austenitic or duplex stainless

an additional amount of material o

required. The additional amount o

minimum allowable wall thickness,

Any areas which are machined afte

NOTE Because of the residual stres

proportional limits inherent in thes

critical dimensions during hydrosta

critical areas during hydrostatic tes

dimensions after hydrotest is avoid

3.3 Performance test

3.3.1 Unless otherwise specified, e

be performed using water at a tem

3.3.2 The requirements of a) throu

stand and before the performance

a) The contract seals and bearings

,

UMP TEST PROCEDURE)

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g of segmented cases and operation of a test p

tems fabricated by welding shall be hydroteste

rotest of an assembled casing shall be of the s

ion, ASME B31.3 is equivalent to ISO 15649.

ll include a wetting agent to reduce surface te

density (specific gravity) of less than 0,7 at the

er than 260 C (500 F).

ltered pattern.

poor castability.

steel pressure-casing components may be hyd

n areas where machining to critical dimensions

material shall not exceed 1 mm (0,040 in) mat

whichever is less.

r hydrostatic testing shall be identified on the

ses resulting from final liquid quenching and re

e materials, small amounts of permanent defo

tic testing. By allowing a small amount of mate

ting, the need to add material by welding to re

ed.

ch pump shall be given a performance test. Pe

perature less than 65 C (150 F).

h h) below shall be met while the pump is ope

test is performed.

hall be used in the pump for the performance

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ump to maintain

in accordance with

me design as those

sion if one or more of

pumping

ostatically tested with

and tolerances is

rial stock or 5 % of

ydrotest report.

atively low

mation can occur at

rial to remain at these

tore close-toleranced

rformance tests shall

rating on the test

est.

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b) If approved by the purchaser, su

prevent damage to the contract se

c) The seal (or seals) shall not have

is in excess of that specified in ISO

unacceptable leakage during the p

If the seal is disassembled or remo

criteria defined in 3.3.5 d).

When the pump is on the test stan

water shall exhibit no visible signs

confirm that a zero-visible-leakage


d) If specified, seal leakage during t

demonstrate satisfactory seal perf

e) All lubricating oil pressures, visc

recommended in the vendors ope

f) Bearings specified to be normall

performance testing using a suitabl

g) All joints and connections shall b

h) All warning, protective and cont

required.

3.3.3 Unless otherwise specified, t

below.

a) The vendor shall take test data, i

and vibration at a minimum of five

1) shutoff (no vibration data requir

2) minimum continuous stable flo

3) midway between minimum and

4) rated flow, and

,

UMP TEST PROCEDURE)

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bstitute seals may be used during the perform

ls or if the contract seals are not compatible w

a leakage rate during any phase of the pump p

1049 or as otherwise agreed by the vendor an

mp performance test requires a disassembly a

ed, the seal shall be retested with an air test o

and water is used as the test fluid, liquid seal

f leakage. ISO 21049:2004, Annex A.1.3, shoul

criterion is appropriate for the seals being test

ion, API 682 is equivalent to ISO 21049.

est shall require the assembled pump and seal

rmance.

sities and temperatures shall be within the ran

ating instructions for the specified unit being t

lubricated from a pure oil-mist system shall b

e hydrocarbon oil.

e checked for tightness, and any leaks shall be

ol devices used during the test shall be checke

e performance test shall be conducted as spec

ncluding head, flowrate, power, appropriate b

points. These points will normally be

ed),

,

rated flow,

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nce test if needed to

ith the test fluid.

rformance test that

d purchaser. Any

nd repair to the seal.

the pump using the

suitable for testing on

be reviewed to

d.

to be rerun to

ge of operating values

sted.

prelubricated prior to

orrected.

and adjusted as

ified in a) through d)

aring temperature(s)

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5) maximum allowable flow (as a

b) The test point for rated flow sha

In the case of high-energy pumps (

not be feasible to test at shutoff. S

c) Unless otherwise agreed, the tes

data sheet (see example in Annex

speed.

d) The vendor shall maintain a com

number of copies, certified for corr

performance data compared to gu

M).

e) If specified, in addition to formal

curves and test data (corrected for

after completion of performance t

shipment.

3.3.4 During the performance test,

a) Vibration values shall be recorde

values shall not exceed those given

b) Pumps shall operate within bear

not display signs of unfavourable o

c) When operated at rated speed,

d) If specified, true peak bearing-h

3.3.5 The requirements of a) throu

a) If it is necessary to dismantle a p

impellers to meet the tolerances fo

diameter exceeds 5 % of the origin

well as the final diameter of the im

operating characteristics after the

,

UMP TEST PROCEDURE)

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inimum, 120 % of Best Efficiency Point).

ll be within a tolerance band of 5 % of rated fl

eeAPI 610 Para 5.1.18), integral-gear and mult

me low specific-speed pumps cannot achieve

t speed shall be within 3 % of the rated speed

). Test results shall be converted to anticipate

plete, detailed log of all final tests and shall pre

ectness. Data shall include test curves and a su

rantee points (see API 610 Para 9.2.4, 9.3.2.2

submittal of final data in accordance with API

speed, specific gravity and viscosity) shall be s

sting for purchaser's engineering review and a

the requirements of a) through d) below shall

d during the test in accordance withAPI 610 P

in 5.9.3.6.

ing temperature limits as defined in API 610 PA

peration, such as noise caused by cavitation.

umps shall perform within the tolerances give

using velocities shall also be recorded for infor

h d) below shall be met after the performance

ump after the performance test for the sole pu

r differential head, no retest is required unless

l diameter. The diameter of the impeller at th

peller, shall be recorded on a certified shop tes

iameter of the impeller has been reduced.

abzevariR023

ow.

istage pumps, it may

20 % BEP flow.

hown on the pump

results at the rated

pare the required

mary of test

nd example in Annex

10 PARA 9.3.2.2,

bmitted within 24 h

ceptance prior to

e met.

RA 5.9.3.2. Vibration

RA 5.10.2.4 and shall

in Table 14.

mation only.

test is completed.

rpose of machining

the reduction in

time of shop test, as

t curve that shows the

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b) If specified, disassembly of multi

diameter change) after test, shall b

c) If it is necessary to dismantle a p

ormechanical operation, the initial

run after the correction is made.

d) If it is necessary to disturb the m

seal faces are replaced with the job

1) pressurize each sealing section i

bar) (25 psi);

2) isolate the test set-up from the

or 5 min per 30 l (1 ft3) of test volu

3) the maximum allowable pressur

3.4 Optional tests

3.4.1 General

If specified, the shop tests describe

agreed upon by the purchaser and

3.4.2 NPSHR test

3.4.2.1 If specified, NPSHR shall be

3.4.2.2 A 3 % drop in head (first sta

performance impairment. The first

using a separate connection to the

first stage onlyshould be considere

3.4.2.3 NPSHR at the rated point sh

NPSHR requires a retest (see 3.3.5

3.4.3 Complete unit test

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UMP TEST PROCEDURE)

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stage pumps for any head adjustment (includin

e cause for retest.

ump for any other correction, such as improve

test shall not be acceptable, and the final perfo

echanical seal assembly following the perform

seal faces, the final seal assembly shall be air-

dependently with clean air to a test gauge pre

ressurizing source and maintain the pressure f

me, whichever is greater;

drop during the test shall be 15 kPa (0,15 bar)

d in 3.4.2 through 3.4.6 shall be performed. Te

the vendor.

determined at each test point [3.3.3 a)] except

ge head on multistage pumps) shall be interpre

stage head of pumps with two or more stages

first stage discharge if possible. If this is not fe

d.

all not exceed the quoted value (see Table 14).

nd 4.3.1).

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g less than 5 %

ent of power, NPSH

rmance test shall be

nce test, or if the test

ested as follows:

ssure of 175 kPa (1,75

r a minimum of 5 min,

(2 psi).

t details shall be

shut-off.

ted as indicating

hall be measured

sible, testing of the

Dismantling tocorrect

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If specified, the pump and driver tr

together. If specified, torsional vibr

The complete-unit test shall be per

components specified by the purch

3.4.4 Sound level test

If specified, sound level tests shall

NOTE ISO 3740, ISO 3744, and ISO

3.4.5 Auxiliary equipment test

If specified, auxiliary equipment su

vendorsshop. Details of the auxilia

the vendor.

3.4.6 Bearing housing resonance te

If a resonance test is specified, the

withthe pump unpiped, and the na

separation marginshall exist betwe

frequencies:

a) multiples of running speed (r/mi

b) multiples of vane passing freque

Test acceptance criteria shall be ag

3.4.7 Mechanical run test

3.4.7.1 If specified, the pump shall

PARA 5.10.2.4)has been achieved.

3.4.7.2 If specified, the pump shall

run shall be performed at rated flo

3.4.7.3 If specified, the beginning o

havestabilized.

,

UMP TEST PROCEDURE)

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ain, complete with all auxiliaries that make up t

ation measurements shall be made to verify th

formed in place of or in addition to separate te

aser.

e performed as agreed between the purchase

746 may be consulted for guidance.

h as oil systems, gears and control systems sh

ry equipment test(s) shall be developed jointly

st

bearing housing(s) shall be excited by impact o

tural frequency(ies) shall be determined from t

en the natural frequency(ies) and the following

n): 1,0; 2,0; 3,0;

ncy: 1,0; 2,0.

reed upon between the purchaser and the ven

be run on the test stand until oil temperature s

be mechanically run for 4 h. Unless otherwise s

.

f the mechanical run test shall not occur until o

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he unit, shall be tested

e vendors analysis.

sts of individual

and the vendor.

ll be tested in the

by the purchaser and

other suitable means

he response. A

excitation

or.

tabilization (API 610

pecified or agreed, this

il temperatures

REP-3

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