8/14/2019 Proper Pump Piping Procedure 10 steps

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Article #26: Proper Pump Piping Procedure 10 steps

ByDr. Lev Nelik, P.E., APICSPumping Machinery, LLC

www.PumpingMachinery.com

I !houl" #e reali$e" ha piping i!!ue! "irecly a%%ec he pump&! li%e an" i! per%ormance.Bringing he pump o he pipe in one operaion an" e'pecing a goo" pump %lange or ve!!el %i i!a very "i%%icul, i% no impo!!i#le, a!k. (hen #ringing he pipe o he pump he la! !pool)!ucion !i"e an" "i!charge !i"e, each* !houl" alway! #e le% unil he pump ha! #een levele" inplace" an" rough aligne". +he %inal alignmen will #e a %ree #ol con"iion-, an", a! may !oun"like a !urpri!e o !ome, no comealong!- woul" #e nee"e". A! an ulimae inve!emen incommon !en!e an" proper aenion o "eail!, your pump! will la! longer, wih %ewer %ailure!o% !eal!, !ha%!, #earing! an" coupling!. More e/uipmen upime, an" le!! lo! pro"ucion, willre!ul in !igni%ican !aving! in "ollar!, an" %ewer hea"ache!.

Step 1 (only for cases where there is ! thermal growth otherwise see Step 2discussion"

A hi! poin he pipe !houl" #e !ecurely anchore" 0u! #e%ore he la! !pool, o preven %uuregrowh owar"! he pump! %lange!.

igure 1 !ccasional usage of $anchors% (only if there is ! thermal growth (which ispractice &ery rare" for the pump piping e'ample would e a &ery short run of suctionpipe connecting it to a cold water tan)* which )eeps the pipe at essentially constant (e+g+amient" temperature* same as water in the tan)+ ,n most cases* howe&er* anchorsshould not e used (see Step 2 discussion"

+he %inal piping lay ou !houl" no #e %inali$e" unil ceri%ie" elevaion "rawing! are receive"%rom he engineering group or %rom he pump ven"or. 1nce he %inal ceri%ie" prin! are receive"he %inal i!omeric! can #e complee" an" he piping akeo%% can #e "one.

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+he "elivery o% he e/uipmen can eiher #e early or i can #e lae in arriving a he !ie. (henhe e/uipmen i! lae i i! criical o have ceri%ie" elevaion prin! o% he e/uipmen. +he ceri%ie"prin! ha he i!omeric! re/uire" %or he piping akeo%%! can #e ma"e wihou impacing hecon!rucion !che"ule. I% he e/uipmen i! early, i will arrive a he !ie prior o he con!rucioneam nee"ing i %or in!allaion. In !uch ca!e!, early preparaion! mu! #e ma"e %or long erm

!orage. I i! cu!omary o u!e oil mi! lu#ricaion o keep he e/uipmen in a!!hippe"con"iion! "uring he !orage. +he pre!!uri$aion o% he #earing hou!ing an" he ca!ing wih0u! 23 o 43 541 pre!!ure preven! moi!ure an" conaminan! %rom enering he !eale" area!an" "amaging he componen!. +he early "elivery o% e/uipmen o he !ie ha! he a"vanageo% allowing %or veri%icaion o% he acual mea!uremen!.Step 21nce he locaion o% he e/uipmen i! !e, he #a!eplae can #e pu in place, levele" an" roughaligne", wih he e/uipmen moune". 6ough alignmen o% he e/uipmen !houl" #e "one prioro #uil"ing he grou %orm!. +o avoi" !re!!e! cau!e" #y hermal e'pan!ion o% pipe!, e'pan!ionloop! !houl" #e in!alle" in !ucion an" "i!charge line!. +he !li"ing- pipe !uppor! near pump!ucion an" "i!charge are re/uire" o eliminae weigh loa"! o% piping on hem pipe, which cancau!e e'ce!!ive loa"! an" mi!alignmen, lea"ing o !eal %ailure!, #earing!, coupling!, ec.

5owever, anchor!- )hree "imen!ional re!rain!* !houl" no #e u!e", a! he!e coul" cau!e!igni%ican !re!!e! an" ca!ing "i!orion! "ue o hermal e'pan!ion. Con!i"er, an e'ample )7ig.4C* o% incorrecly place" anchor- )re!raining growh in ALL "irecion!, i.e. no !imply a verical!li"ing- !uppor*, even 4 %ee away %rom he pump !ucion, an" he ca!e where he pipee'pan"! #y only 83 "egree! 7 )morning o a%ernoon*9

7or he pipe you u!e, he area o% conac #eween he pump an" pipe %lange! "epen"! on he!i$e o% he pipe. A!!ume, %or e'ample, a 43 in4conac area )or u!e your pipe:%lange num#er*.+he re!ulan %orce on he pump will #e97 ;

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A. Correc9 !li"ing !uppor "oe! no rerain he piping o !li"e up:away B. Piping re!raine")can no !li"e up:away*, high hermal e'pan!ion loa"! C. Anchor- will )pro#lem>* allowpipe o e'pan" owar"!:ino he pump,

cau!ing hi

igure 2 -ough alignment phase (note that the motor and the pump are not coupled yetand the aseplate is still sitting free* not grouted

Step .1nce you are !ai!%ie" wih he rough alignmen, remove all he e/uipmen )pump, moorgear#o', ec* %rom he #a!eplae. Level he #a!eplae o ma'imum ou o% level o% 3.34?@ )3.3