Piping Layout Presentation.ppt

8/20/2019 Piping Layout Presentation.ppt

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Piping Layout Engineering -

Basic Concepts


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Piping Layout Considerations:

OperationMaintenance

Constuctability

Economics

Safety

Aesthetics


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Design for Constructibility Ten Commandments:

K eep I t Straight and Simple K eep I ts Structures Simple K eep I ts S pecification Simple K eep I t Shop Standard K eep I ts Standard Simple K eep I t Same Size

K eep I t S uare and S uatty K eep I ts Support Simple K eep I ts Schedule Sacred K eep I ts Site Suitable


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Ma!or steps before Piping Layout "esign:

#"e$elopment of Plot Plan

#E uipment layout design

#Conceptual Piping layout design


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EQUIPMEN L!"#U $UNI PL# PL!ND%!&IN' 'UIDE LINES

The follo%ing are the guidelines generally follo%ed %hile ma&ing an E uipment layout'unit plotplan dra%ing(

a) E uipment layout shall be dra%n in *:+, or *:*,,

scale(

b) A, size dra%ing sheet should generally be used for

e uipment layout( -f the area to be co$ered is small. A*

size can be used(

c) Place north arro% at the top right hand corner of the

sheet to indicate plant north(

d) The area abo$e title bloc& to be &ept free for general

notes and reference dra%ings(


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e) All e uipments are mar&ed %ith its e uipment no( as appearing in E uipment list / dimensions

0diameter. height'length etc()f) All e uipments center line are located in plant

building %(r(t( the column grid( 1or layout ofoutdoor plant ' offsite facility. the e uipment shall be located by co2ordinates(

g) Conceptual layout. P / -". $endor'fabricatede uipment dra%ings are to be used as basicdocument for preparing e uipment layout

dra%ing(h) 3al&%ays. cutouts. piperac&s. floor drains. gutter.

trenches. ramp etc( if applicable should be clearly mar&ed in the dra%ing (


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i) 1or in house plant layout. the location of staircases. lift /

other utility areas should be clearly sho%n(

!) -n e uipment layout sectional dra%ing. for each e uipment

its top most or bottom most ele$ations should be mar&ed(

&) Orientation of e uipment shall be clearly mar&ed for all

the

e uipments by orienting one of the ma!or nozzles(

l) -n case of reactors ' tan&s. the location of manhole '

handhole.

S4'L4.L- etc( shall be at accessible position(

m) E uipment lifting cutout shall be mar&ed clearly in the


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n) E uipment planned to be installed in future shall be

sho%n dotted(

o) 1or heat e5changers. tube remo$al ' cleaning space

shall be mar&ed(

p) 3hile locating the pumps care shall be ta&en to ensure

that the 6PS7 re uirement is met(

) 4eneral notes are %ritten on one of the dra%ings 0first)

and shall not be repeated on all layouts but reference

shall be gi$en( r) "irection of north shall be maintained same for all the

plans for the same plant ' pro!ect(


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s) -f more than one dra%ing is re uired to co$er a

specified area. then the match line shall be indicated clearly%ith the reference dra%ings(

t) One of the general notes should specify the

absolute le$el of the area co$ered %ith respect to the plot(

u) The e uipment load. operating or test load

%hiche$er is ma5imum shall be considered for design and the

layout should indicate this along %ith the dynamic factor

%here$er applicable( This could also be co$ered in table as

%ell(


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$) 1or reactors %ith agitators. lifting beam shall be pro$ided for

agitator remo$al(

%) 1or $endor e uipments maintenance space as recommended by

them for maintenance shall be pro$ided(

5) E uipment layout shall also indicated the positions of utility

stations. safety sho%er and eye %ash(

y) E uipment ele$ation shall be so arranged to ensure gra$ity

flo%

%here specified(


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-rrespecti$e of the type of arrangement. there are certain basic principles to be follo%ed %hile locating the e uipment(

# Economic piping# Process re uirements

# Common Operation

# 8nderground facilities# Climatic conditions


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!CCESS PL! )#%MS

The follo%ing guidelines shall be follo%ed for pro$iding access platforms in the layout(

a) 1or all Manholes %ith centre line ele$ation abo$e 9+,,

mm( b) 1or instrument $ision( The L4 should be $ie%ed %hile

operating the bypass of the control $al$e(c) At ,, mm 2 *+,, mm belo% the Manhole(

d) A minimum height of ;(+ m to be considered bet%een platforms to ta&e care of the headroom(

e) The platform at the top of the to%er shall be at ;+, to 9,,mm abo$e the top dish(


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P*IL#S#P*" #) IN-PL!N PIPIN'

o

o


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=A>" P-P-64

P / - diagram. e uipment layout. piping specifications.e uipment dra%ing and the $endor re uirement for proprietarye uipment form the basis of a piping layout( -n areas %here

piping is critical. the e uipment locations are fi5ed only after a?piping study@ is made(

The first step in the de$elopment of pipe rac& is the generationof a line routing diagram( A line routing diagram is aschematic representation of all process and utility piping systems

dra%n on a copy of plot plan or it could be planometricrepresentation of the utility and process line diagrams( Althoughit disregards the e5act locations. ele$ations or interferences. itlocates the most congested area(


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1.5 TO 2M

TYPE 1

5 TO 6M 1TO 1.2M

TYPE 2


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5 TO 6M

TYPE 3

/ * 0 1 1 ll 2i0 0 i b l 3(


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/e *ea0roo1 nor1ally pro2i0e0 is as belo3(Sr( "escription 7eadroom

6o( 0mm)*( Clear head room under ;;,,

Structures'pipe linesinside operating area(

;( 7ead room o$er rail B,,,0from top of rails)

9( Clear headroom abo$e B,,,crest of road for cranemo$ement(

( Clear headroom abo$e D,,,crest of road for truc& mo$ement(

+( Clear headroom abo$e +,,crest of road bet%een

process units(


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8al2e !ccessibility


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+(,(9 PIPIN' )#% INS %UMEN S

-nstruments.%hen located on piping .%ill need certainspecific re uirement for it to perform the duty for %hich it is pro$ided( Piping Engineer should be a%are of thesere uirements and should ta&e care of the same %hile routingthese pipe lines(a) 1lo% measurement instrument need certain straight lengthupstream and do%nstream of the instrument(This is normally*+" on the upstream and +" on the do%nstream(

b) The pipe lines in %hich flo% meters such as magneticflo%meters .$orte5 meters .turbinemeters etc are located should

be routed in such a %ay that the line %ill be full %ith li uid allthe time(The pipe line should be supported on both sides ofmeter(


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c) Control $al$es are located at grade. at about +,,mm height to pro$ide con$enient access for operation and maintenance( loc&and bypass $al$e also form the same criteria( The standard

arrangements follo%ed are as per 1ig ;(9(;9 ( -f poc&eting the process line is unacceptable. then a permanent or mobile platformshould be planned. as access is $ery important( Locating control$alues on the $ertical line should be a$oided(-f is una$oidableF theshould actuator should be supported properly(The bypass should

be selected for easy operation(

d) -solation $al$es for le$el gauges and pressure gauges shall bemade accessible( Access and space for the remo$al of le$elcontrollers temperature probes .conducti$ity probes.bottom flagsof the control $alues etc shall be pro$ided( All primary andsecondary indicators of pressure. temperature. flo%. le$el.

positioners etc( should be $isible from the operating area(


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e) >otameters shall be placed on $ertical line and the inletshould be from the bottom of the instrument(

f) Thermo%ell shall be located on the pipe line of re uiredsize(-nstrument hoo& up shall be reffered for the re uirement(

g) Enough operating and maintance access shall be considered%hile locating any instrument(


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The Considerations to arri$e at an economical rac& desgingare

*(


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/e re;uire1ent as per t/e follo3ing s/all bea0/ere0 to

a) The 1actories Act * G(

b) The Petroleum Act * 9 / The Petroleumrules * BD(

c) The Static and Mobile Pressure ules * G*(

d) The 4as Cylinders >ules * G*(

e) The -ndian oiler >egulations * +*( f) "e$elopment control rules by the State

-ndustrial "e$elopment Corporation (


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B F W

TA N K

E C O N O M IS E R

B F W

H P D O S IN G

B O IL E R F E E DW A TE R P U M P

D O S IN G TA N K D O S IN G P U M P

P I

M A N I F O L D

C O N S U M E R

S T

Y

S T

TO A TM O S .( T Y P )

L G L G L G L G

B L O W D O W ND R A I N

B LO W D O W N TA N

N O TE :

P IP E L IN E S T H E P U R ! I E W O F IB R S H O W N W ITH T H IC H L IN E S .

IB R S C O P E

IB R S C O P E


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+(,(. C%I IC!L E

The uality of the e uipment and piping layout can beestablished by the Critical E5amination Techni ue %here youensure that all the follo%ing parameters are %ell addresseda) -t is process ade uateH

b) -t is operator friendlyHc)-t is construction clearHd)7as ade uate maintenance access pro$idedHe)7o% to e$acuate in case of emergencyHf)7as safe fire fighting access pro$idedH

g)Standard practices %here applicable has been adoptedHh)-s the piping arrangement aesthetic Hi)-s supporting arrangement ade uate and aesthetic H

!) -s piping ade uately fle5ible H


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EQUIPMEN !ND PIPIN' L!"#U - PUMPS

Pumps rarely influences the plant layout e5cept %here a

common standby for t%o ser$ices or multiple duty pumps

might dictate the process e uipment arrangement( ut the

pumps can ne$er be treated as an independent entity. but to be

treated as part of the piping system %hich affects the

performance e$en if the basic selection is faultless(


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The design of e uipment and piping configuration

affect the energy used and capital cost of pumps( 7ence.

economy of piping and structures along %ith ease of

operation and maintenance are the principal aim %hile

arranging the pumps (


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The primary goal in locating the pump is to minimize the

piping configuration %hile satisfying the performance and

fle5ibility re uirements as %ell as allo%able loads that may

be sub!ected to the nozzles(

Mechanical or Chemical Engineers can no longer

consider the pump as an independent entity. but to be treatedas a part of the Piping System(


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Piping Layout Presentation.ppt