Pipe Work - salmson NEX Manuel D'installation Et Mise En Service

exp ansion at operat ting temperature
liqu uid temperatures, , alignment shou
tem mperature is reac hed (pump and p
che cked just after m machine shut dow
Pump and dr
iver must be iso
operations are e performed.
Pump and mo otor were aligned
use very thic k shims to adju
mea ans that the base eplate is twisted.
Che ecking the couplin ng alignment :
Che eck distance betw ween the two half
Che eck radial and axia al deviation.
Several types of flexible coupl
operating in nstructions to
mis alignment limits. .
Sev eral methods ca n be used to ma
met thod will depend d on the type of
ope erating methods are briefly descr
bas ic metrology equ uipments are avai
Usin ng a straight‐edg e and a caliper :
Usin ng a dial gauge :
When checkin ng parallel align
shown is twice e the value of the
plane first, then
Alig gn in the vertical
Life time of ball bea aring and couplin
nois se level will depe end on the alignm
Cou upling alignment is not necessary
use d. Both motor an nd pumps shaft a
7.2 2 PIPE WO ORK
Pum mp connection fla anges are plugge
tran nsport and storag ge. Protective cov
inst talling the pump p in the piping.
cov ers from pump p flanges. Espec
tho roughly piping be efore connecting
 Re
emove protective e covers
 Ad
dd flange gaskets s
 Fa
asten suction pipe e
 Fa
asten discharge p pipe
No stress mus st be applied to t
excessive, th ose forces and
ove erheating of beari ings, coupling we
exp losion of pump c casing.
After replacem ment of a pump
pump flanges, , never use pump
the pipe works.
The e axial displacem ment of expansio
limi ited. Use tie rods s as recommende
e. In pump install ation involving h
ld be checked ag gain when operat
piping). Alignmen nt quality should
wn.
olated electrically y before alignm
before dispatch
. If it is necessary
ust coupling alig nment on site t
Leveling has to b be modified.
f couplings.
lings can be used d. Refer to coupl
know adjustm ment values a
ake coupling alig gnment. Choice o
f equipments ava ailable on site. T
ribed hereafter. T They can be used
ilable :
ment, the total indicator read‐o
e actual shaft disp placement.
n horizontally by moving the mot
ng flexible part a as well as pump
ment quality.
y when a IEC ad daptation lantern
re aligned by con nstruction.
d to avoid any co ontamination dur
vers should be re emoved only befo
Remove dust be efore removing t
cially for new p pipe work : cle
it to the pump.
the pump casing by the pipe work
d moments ca use misalignme
ear, vibrations an d possible failure
p or during conn nection of pipes
p flanges as a sup pport to pull or pu
on coupling (if in nstalled) should
ed by the manufa cturer.
high
ting Tw wo designs are po
d be su ction lift operatio
ent
y to
Po ositive suction he
this
No ominal diameter
su ction flange. Une
ec ccentric transitio
be efore the pump i
dim mension). The s
to ward the pump.
ling
and
of a
Two
d if
Su uction lift operatio
Th he suction pipe in
th e liquid and a st
Th he strainer should
su ction head loss.
an nd avoid any air p
Su uction lift line sho
str raight pipe (lengt
m ust be added in f
lea ast equal to the p
lim mit flow speed to
Th he size of the su
m inimum pressure
no ominal flow.
Check that p
available NPS
Di scharge pipe :
No ominal diameter
flo ow speed of 3m/s
Fil ter :
out
If required a filter
pr roper working of
sh ould be 3 time th
tor.
Clogging leve
pset
n is
Va alves :
It is advised to ins
m aintenance purpo
co ould be locked in
ring
Iso olating valve on s
fore
su ction flange.
the
ean
No on‐return valve :
A check valve can
fro om back flow eff
pu ump is stopped.
Au uxiliary pipings:
Fo or most of applic
k. If
m ust be equipped
ent,
lea akages and that d
e or
Sh haft sealings :
s to
ush
Gl and packing :
If the pump is in
pr ressure is small (l
avoid air intake
be
to
13
EN
ossible for the su uction line : posit
on.
ad operation :
of the pipeline is often larger d
equal nominal dia ameter should be
n part. It is reco ommended to in
inlet (size L shou uld be 2 to 3 tim
suction line shou uld be laid with
on :
ntake should be located below t
rainer with non return foot valve
d be set far enoug gh from pit botto
Ensure that the ere is no air inta
pockets creation.
ould be laid with h a rising slope t
th should be 8 to o 10 time the pip
front of pump. N Nominal diamete
pump inlet size. P Pipe diameter sh
2m/s.
uction strainer/fo oot valve will be
e losses in strain ner and full open
pump required N NPSH (NPSH
R
SH (NPSH ).
A
of discharge pip pe should be cho
s.
can be installed d before the pum
pump the equiva alent exchange s
he pipe sectional area.
el of filter should be checked regu
tall isolating valv ves on suction an
ose. Those valves s should be of la
position.
suction side shou uld not be connec
be installed on discharge side t
fects such as pre essure surges or
ations a single m mechanical seal i
d with auxiliary e equipments chec
direction of flow is respected.
stalled for sucti on lift operation
ess than 10mwc) ), it will be neces
trough the packin ng rings.
NGLISH
tive suction head d and
diameter than p pump
e compensated b by an
nstall a straight pipe
mes the pipe nom minal
h a downward s slope
he minimum lev el of
e should be insta alled.
om to avoid exces ssive
ke along suction n line
towards the pum mp. A
pe nominal diame eter)
r of the pipeline is at
ould be calculate ed to
e selected to en nsure
ning of NRV at p pump
) is s lower than sys stem
osen to ensure a max
mp intake. To en nsure
urface of the stra ainer
ularly.
nd discharge side e for
rge passage type e and
cted directly to p pump
to protect the p pump
back flow when n the
s used. If the se aling
ck that there are e no
n and the disch harge
ssary to add a que ench