SAMSUNG SEM 3074E Piping Design Manual Pump Piping

Piping Piping Design Design Manual Manual PUMP PUMP PIPING PIPING REV. : 4 DATE : 2006 2006. . 11. 11. 10

SEM SEM -3074 -3074E E 4

PUMP PUMP PIPING PIPING 2006.11.10

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CONTENTS Page 1. GENERAL GENERAL 1.1

Purpose Purpose and Applicat Application ion Scope Scope ------------------------------------------------------------------------------------------------- 1

1.2

Relevant Relevant Manuals and Standard Standards s ----------------------------------------------------------------------------------------------- 1

1.3

Basic Concept --------------------------------------------------------------------------------------------------------------------------------------- 1

2. CRITERIA CRITERIA FOR DETAILED DETAILED DESIGN 2.1

Criteria Criteria for Pump Layout Decision Decision ------------------------------------------------------------------------------------------ 4

2.2

Pump Surroundings Surroundings Piping Piping ------------------------------------------------------------------------------------------------------------------ 6

2.3

Pump Surroundings Surroundings Support Support -------------------------------------------------------------------------------------------------------------- 13

3. HISTORY OF THIS MANUAL ------------------------------------------------------------------------------------------------------------------------------- 15

APPENDIX I. Typical Typical Arrangem Arrangement ent Drawing Drawing (Sample) (Sample)

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1. GENERAL GENERAL 1.1 Purpos Purpose e and Appli Applicat cation ion Scope Scope The purpose of this manual manual is to increase increase efficienc efficiency y and establish establish standards standards for design by providin providing g the basic concept concept necessary necessary for piping piping design design and the criteria criteria for detailed detailed design relevant relevant to pump on the plant which which is designed designed and/or construct constructed ed by Samsung Samsung Engineering Engineering Co., Ltd. Ltd.

Th The e scope scope include included d in this manua manual l is for the normal normal pumps pumps under under room temper temperatu ature re, , and it

shall shall not be used used fo for r specia special l pumps. pumps. 1.2 Releva Relevant nt Manuals Manuals and Standa Standards rds 1.2.1 1.2.1

Relevant Relevant to pump layout layout decision decision criteria criteria (1) SEM-2002 SEM-2002 "Plant Layout Layout Standard Standard (for Chemical Chemical Plant)" Plant)"

1.2.2 1.2.2

Relevant Relevant to pump pump surroundin surroundings gs piping piping (1) SEM-3039 SEM-3039 "Piping "Piping Design Design Criteria Criteria" " (2) SEM-3016 SEM-3016 "Piping "Piping Flexibil Flexibility ity Analysis Analysis" " (3) API 610

"Centrif "Centrifugal ugal Pumps Pumps for General General Refinery Refinery Service" Service"

(4) API 686 "Rec "Recomme ommended nded Prac Practice tice for Mach Machiner inery y Inst Installa allation tion and Inst Installa allation tion Desi Design" gn" 1.2.3 1.2.3

Relevant Relevant to pump surround surroundings ings support support (1) SEM-3040 SEM-3040 "Pipe Hanging Hanging No.1 (Piping Hanging Manual)" Manual)" (2) SEMSEM-3043 3043 "Pipe Supp Support ort Desi Design gn Data Data" "

1.3 Basic Basic Con Concep cept t 1.3.1 1.3.1

De Defin finit ition ion of pump pump Pu Pump mp is a device device which which give give pressu pressure re to fluid fluid pa passi ssing ng th throu rough gh it an and d discha discharge rges s the fluid fluid to the outside. outside.

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1.3.2 1.3.2

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Ty Type pe and specif specifics ics of pump pump (1) Classifi Classificati cation on by structur structure e and operatio operation n method method

Type

Classification by structur structure e

Classification by operatio operation n

Specifics

method This type of pump sucks in fluid through reciprocating reciprocating movement movement of piston piston or plunger, plunger,

Reciprocating pump

- Piston Piston pu pump mp

and discharges discharges fluid by

- Plunger Plunger pump

pressing pressing with required required amount amount

- Diaphrag Diaphragm m pump

of pressure. It is used when

Positive

high pressure pressure is required required even

displacement

though though the amount amount of discharg discharge e

pump

is small. small. This type of pump sucks in Rotary pump

- Gear pump - Screw pump - Vane pump

fluid fluid throu through gh the rotati rotation on movement of rotor, and has the advantag advantage e of little little pulsatio pulsation n due to the special characteristics characteristics in operation. operation. This type of pump transfers transfers

- Radial Radial fl flow ow - Volute Volute pu pump mp Centrifugal pump

- Mixed flow pump - Axial flow

Kinetic Kinetic pump

pump

energy energy to fluid fluid through through centrifu centrifugal gal force force by impeller impeller rotation rotation or through through the changes changes of size and directio direction n of sectio section n area area of passag passage, e, and converts converts velocity velocity energy energy to pressure pressure energy in volute volute chamber chamber or diffuser diffuser. .

Special Special pump

- Jet pump

This type of pump has a low

- Gas lift pump

efficien efficiency cy and is not used

- Wesco pump

except except for a special special purpose. purpose.

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(2) Other classification classification 1) Classifi Classificati cation on by suction suction type : - Single Single suction suction type - Double Double su sucti ction on ty type pe (for (for big vo volum lume e pump) pump) 2) Classifi Classificati cation on by the number of impeller impeller arrangemen arrangement t : - Single-s Single-stage tage type - Multi-st Multi-stage age type 3) Classifi Classificati cation on by the pump installa installation tion method : - Vertic Vertical al pump pump type type - Horizont Horizontal al pump type 1.3.3 1.3.3

NP NPSH SH (N (Net et Positive Positive Suction Suction Head) Head) NPSH is the numerical numerical value value expresse expressed d by hydrauli hydraulic c head after deductin deducting g the vaporizi vaporizing ng pressure pressure proper to water water temperat temperature ure from the total total pressure pressure (indicated (indicated in absolute absolute pr press essur ure) e) loaded loaded on pump pump suctio suction n nozzle nozzle. .

In NPSH, NPSH, th there ere are NPSH NPSH Requir Required ed (NPSH (NPSHr) r) which which

is requir required ed by pump pump itself itself an and d NPSH NPSH Availa Available ble (N (NPSH PSHa) a), , and care shall shall be ta taken ken when when NP NPSHr SHr is bigger bigger than NPSHa NPSHa as ca cavit vitat ation ion occurs occurs in th this is case. case.

When When cavita cavitatio tion n

oc occur curs, s, it ca cause uses s vibrat vibratio ion n and noise, noise, and ca casin sing g and im impel peller ler can be co corro rroded ded or pump pump ef effic ficie iency ncy is droppe dropped. d.

Th There erefor fore, e, if th the e differ differenc ence e betwee between n NPSHa NPSHa and NPSHr NPSHr is less less

than 0.3 ∼ 1.0m at the time of checking vendor data sheet [ that is, NPSHa NPSHr〈 (0.3 ∼ 1m)], 1m)], decision decision on NPSH test shall shall be made according according to Engineer Engineering ing Specific Specificatio ation n SES-GA-2 SES-GA-201E 01E and API 610. 《 Pump Differen Differential tial Head 》

10 H 〓 (Po Ps) × ──── Sp.Gr Where,

H

: Head (m)

Ps : Pum Pump p suct suctio ion n pres pressu sure re

(㎏/㎠)

Po : Pump discharge pressure (㎏/㎠) Sp.Gr Sp.Gr : Specific Specific gravity at pumping pumping temperat temperature ure

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《 NPSH Required 》

NPSHr 〓 σ× H Wher Where, e,

H

: Pum Pump p dif diffe fere rent ntia ial l hea head d

σ : Cavitati Cavitation on coeffici coefficient ent of Thoma Thoma

《 NPSH Available 》

NPSHa 〓 (P1  P2) ×

Wher here,

10 ───  △P ＋ H Sp.Gr

P1 : Pres ressure sure at suc suction tion liq liquid uid leve evel

(㎏/㎠)

P2 : Vapor Vapor pressu pressure re at su sucti ction on te tempe mperat ratur ure e (㎏/㎠) △P : Pressure drop in suction line

(㎏/㎠)

H : Height Height be betwe tween en the normal normal li liqui quid d level level and pump pump ce cente nterl rline ine (m)

2. CRITERIA CRITERIA FOR DETAILED DETAILED DESIGN 2.1 Criter Criteria ia for Pump Pump La Layou yout t Decisi Decision on 2.1.1 2.1.1

Requirem Requirements ents (1) Install Install suction suction line to be minimum minimum and straight straight against against suction suction resource resource if possible. 1) Minimize Minimize pressure pressure drop of suction suction line. line. 2) Restrain Restrain the cavitati cavitation on occurren occurrence. ce. (2) Considering Considering the installa installation tion and removal removal of pump and motor, motor, installa installation tion shall be done on the convenie convenient nt place place for maintenance maintenance. . (3 (3) ) Instal Install l on the pl place ace where where access access is easy easy du durin ring g the op opera erati tion. on. (4) Installa Installation tion shall shall be balanced balanced with the overall overall equipmen equipment t arrangem arrangement. ent.

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2.1.2 2.1.2

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Pump arrangem arrangement ent (1) Line-Up for pump discharge discharge nozzle 1) Piping Piping is standard standardized ized. . 2) Support Support is convenie convenient. nt. 3) Piping Piping is orderly orderly arranged arranged. . 4) Operatio Operation n and control are easy easy. . (2 (2) ) Line-u Line-up p for th the e rear rear of pump pump founda foundatio tion n 1) Constr Construct uctio ion n of cable cable pit is easy. easy. 2) Pump Pump motor motor and switch switch are lined lined up, an and d instru instrumen ments ts are orderl orderly y arrang arranged. ed. (3 (3) ) Line-u Line-up p for th the e front front of pump pump founda foundatio tion n It is convenient for cleaning inside of pump and for the pump which is necessary to discharg discharge e internal internal fluid fluid during during the maintena maintenance. nce. (4) Arrangem Arrangement ent for vertical vertical pump Line-u Line-up p for th the e center center of sh shaft aft shall shall be done done with with the consider considerati ation on of installation installation and maintenance. maintenance.

2.1.3 2.1.3

Pu Pump mp sp spaci acing ng and height height of pu pump mp foundati foundation on (1) Pump spacing (pump centerli centerline ne to centerli centerline) ne) The following following table table shall shall be the basis in plot checking, checking, and the detailed detailed dimensio dimension n shall shall be decided decided after piping piping study. study.

Suction pipe size (B)

Up to 2

2.1/2∼5

6∼10

12∼14

16∼18

Pump spacing (mm)

1500

2000

2500

3000

4000

(2) Height of pump foundation foundation Height Height of pump pump fo found undat ation ion sh shall all be 100∼300mm from ground level or floor level if it is on the paving or inside of building, but it shall be 300∼500mm 500mm for the area area where where flood flood is expected expected. .

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2.2 Pump Pump Surrou Surroundi ndings ngs Piping Piping 2.2.1 2.2.1

Typical Typical arran arrangeme gement nt Refer Refer to Appendix Appendix I "Typical "Typical Arrangement Arrangement Drawing Drawing (sample) (sample)". ".

2.2.2 2.2.2

Major Major consider considerable able items items (1) Consider Consideratio ation n of pressure pressure loss 1) Piping Piping around around pump (specially (specially suction suction line) line) shall shall be simple simple and with the minimum minimum length length so that the pressure pressure loss shall be minimize minimized. d. 2) Radius of curvature in curve area shall be used with big one (long radius elbow) if possible and short radius elbow shall not be used as a rule. 3) If discharge pipe size is bigger than pump nozzle size, install gate valve and check valve on the line after size is increased. (But, except when it is indicated on P & ID.) 4) If more than 2 sets of pumps are used in a row, each suction piping shall have the same amount of pressure loss so that there will be no drifting but the uniform uniform flow on each pump. (for example, example, symmetri symmetric c piping). piping). (2) Considerati Consideration on of external external force on pump nozzle 1) Piping Piping shall shall be routed routed to avoid avoid over-l over-load oad as vibrat vibration ion an and d abrasi abrasion on on ax axles les occur occur due to eccent eccentric ricity ity and a bad ef effec fect t happen happens s to the fu funct nctio ion n if over-l over-load oad is loaded on the pump nozzle. 2) For AP API I pump, pump, apply apply al allow lowabl able e loadin loadings gs of API 610. 610.

And follow follow the value value

specif specified ied by maker maker if any. any. 3) To avoid over-load on pump nozzle due to thermal expansion of piping , the below items items shall shall be applied. applied. ① Absorb Absorb thermal thermal expansio expansion n by piping piping route. route. ② Improve Improve method method of support. support. ③ Install Install expansio expansion n joints. joints. (Avoid (Avoid this method method basicall basically.) y.)

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4) Check Check piping piping route route consider considering ing difference difference in temperat temperature ure of piping piping due to the operatio operation n method method if pump is in stand-by stand-by. . (3) Consider Consideratio ation n of cavitati cavitation on 1) Cavita Cavitatio tion n occurs occurs when NP NPSHr SHr is larger larger than NP NPSHa SHa. .

Cavit Cavitati ation on re reduc duces es th the e

performa performance nce of pump, pump, causes causes vibratio vibration n or noise noise and corrodes corrodes the material materials. s. Theref Therefore ore, , minimi minimize ze pr press essure ure loss loss on pump pump piping piping and, and, care care shall shall be taken taken to avoid avoid drifting drifting on the nozzle. 2) Minimum Minimum required required straight straight pipe on suction suction nozzle nozzle to prevent prevent drifting drifting

Required straight

Suction Suction type

pipe on suction suction

End suction suction

5D and over

Single suction Side suction suction

Top suction suction

5D and over 5D~10D and over or

Double suction

flow straighten straighteners ers

Single suction

5D and over

Double suction

5D~10D 5D~1 0D and over

Remarks

Se See e figure figure 1.

See figure figure 2-1 and 2-2.

Se See e figure figure 3.

Note : D = Suction nozzle size

D

D

5D and over 5D~10D 5D~10D and over

Figur Figure e 1.

En End d suction suction pipi piping ng

Figur Figure e 2-1. 2-1.

Side Side suctio suction n piping piping

(Double suction)

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Special Special caution is required required for drifting drifting in case of double suction. If the balance on right side

D

and left left si side de of pu pump mp impel impeller ler breaks breaks down, pu pump mp capaci capacity ty or effici efficienc ency y will will be reduce reduced d and the life of axle shaft due to thrust will be reduced 5D and over

at the same time. Using flow stra Using straight ightener ener redu reduce ce stra straight ight-run -run. . But straight stra ight-run -run refl reflecte ected d is acco accordin rding g to vend vender's er's requirement.

Fi Figur gure e 2-2.

Si Side de suction suction piping piping

(Single suction)

5D and

D

D

over

over

SINGLE SUCTION Fi Figur gure e 3.

5D~10D and

DOUBLE SUCTION To Top p suctio suction n piping piping

3) When When reduce reducer r limite limited d to one pi pipe pe diame diameter ter is applie applied, d, reduce reducer r could could be at attac tached hed to companion flange of pump nozzle. in this case, straight rub is based on pipe diameter diameter form pipe end point. point. 4) Straight Straight-run -run could could be adjusted adjusted accordin according g to vender's vender's requirem requirement. ent.

(4) Considerati Consideration on of air pocket on suction suction line 1) Allow approximately 1/20∼1/50 of slope slope on suction suction line toward toward suction suction resource resource if suction suction resource resource is lower lower than pump suction suction nozzle.

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2) Allow 1/20 and over of slope on suction line toward pump at vacuum tower.

1/ 1/20 20 and over over

3) Install Install eccentric eccentric reducer with top flat on suction suction nozzle. nozzle.

4) If gate valve is to be installed on the line whose suction resource is located lower lower than the pump suction suction nozzle, nozzle, valve stem shall be horizont horizontal. al.

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(5) Caution Caution on air suction suction (local (local turbulen turbulence, ce, total total turbulen turbulence) ce) 1) If turbulen turbulence ce occurs occurs around around suction suction piping, it causes causes vibratio vibration n and noise as the air infiltrates. infiltrates. 2) Local vortex flow : This This is the vo vorte rtex x rotati rotating ng wh while ile the water su surfa rface ce is lo local cally ly su sucke cked d in, it its s occurr occurrenc ence e and extinc extinctio tion n are common commonly ly re repea peate ted, d, and air is sucke sucked d in when when a column column of air at th the e center center area area reach reaches es to

the suctio suction n intake intake. .

3) Total vortex flow : When water surface surface around suction suction intake intake lowers lowers down, down, the surface surface fluctuat fluctuates es and revolves fast around suction intake and a lot of air is sucked in.

4) Suction piping on tower or vessel : Vortex Vortex breaker breaker is installe installed d on tower tower or vessel vessel nozzle nozzle connecte connected d to pump nozzle. nozzle.

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5) Details Details for suction suction piping piping installa installation tion : note.2 1.5Do and

3Do and

below

over

1.5Do 1.5Do and below

SCREEN

note.2)

Do

Do

TRASH RACK

1.5Do 1.5Do and over 0.8 Do and below

D

10'or 10' or belo below w is recommended. 15'is max.

Suction Suction nozzle nozzle diameter diameter is generally

D 〓 1.5 D0.

Note.1) Note .1) Thes These e Dim. is reco recommen mmended ded Note.2) Note .2) Thes These e Dim. could be adju adjustab stable le acco accordin rding g to cust customer omer's 's requirement requireme nt or constructi constructibility. bility.

6) Details of suction nozzle : Refer Refer to KS B 6302 6302 for th the e manufa manufactu cture re of suctio suction n no nozzl zzle, e, an and d procur procureme ement nt sh shall all be execut executed ed as a sp speci ecial al order order. .

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(6) Others Others 1) By-pas By-pass s line line which which is instal installe led d on pump pump discha discharge rge li line ne sh shall all be routed routed wi witho thout ut pocket. 2) For pump suction suction piping from storage storage tank, consider consideratio ation n shall shall be given given so that pump pump suctio suction n nozzle nozzle sh shall all not be highe higher r than than the outlet outlet nozzle nozzle of ta tank. nk. 3) Avoid Avoid installa installation tion of chemical chemical or water water supply supply line near the suction suction nozzle of reservoir so that air shall not be sucked in.

2.2.3 2.2.3

Method Method for strainer strainer install installatio ation n (1 (1) ) Type Type of strain strainer er 1) Temporar Temporary y strainer strainer : This type of strainer is to be installed on pump suction line during the precommissi commissionin oning g in order order to protect protect pump from entering entering of earth/sa earth/sand nd and pieces of iron in the pipeline pipelines s through through the construc construction tion. . 2) Permanen Permanent t strainer strainer : This type of strainer is to be installed to protect pump from slurry included in the fluid fluid during during the normal operatio operation. n. (2) Installa Installation tion location location for strainer strainer 1) Install Install on the place where where cleaning cleaning and access access are convenient convenient. . 2) Consider Consider about piping piping route route and support for simple simple installa installation tion and easy removal. removal. 3) Temporar Temporary y strainer strainer shall be installe installed d on the largest largest flange flange between between pump suction suction nozzle nozzle and block valve. valve.

2.3 Pump Surro Surroundi undings ngs Suppor Support t 2.3.1 2.3.1

Su Suppo pport rt regardi regarding ng of eccen eccentri tricit city y of pump : (1) Support shall be installed so that pipe and valve may not load on the pump nozzle.

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(*) Support Support nozzle nozzle surround surroundings ings. . (But, (But, about 1m.) (2) Suction Suction line and discharg discharge e line shall be supporte supported d respecti respectively vely. . (3 (3) ) If suppor support t is instal installe led d right right close close to su sucti ction on or di disch scharg arge e nozzle nozzle, , it shall shall be minutely minutely adjustable adjustable type so that centering centering can be convenie convenient. nt.

2.3.2 2.3.2

Support Support installed installed around around suction suction or discharg discharge e nozzle A suppo support rt instal installe led d around around su sucti ction on or di disch schar arge ge nozzl nozzle e shall shall be such such a type type that that pi pipin ping g ca can n be remove removed d and pu pump mp ca can n be disman dismantle tled d easily easily. .

2.3.3 2.3.3

Un Unnec neces essar sary y suppor support t with with respec respect t to the load on pump pump nozzle nozzle Al Altho thoug ugh h suppor support t would would not se seem em to be ne neces cessa sary ry with with respec respect t to the load load on pump pump no nozzl zzle, e, indicate indicate it on the drawing consideri considering ng the temporary temporary support support of piping piping during during the time of pump maintena maintenance. nce.

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3. HISTORY OF THIS MANUAL Rev.

Date

3

1996. 11. 15

Description (1) Progress of Enactment This manual is enacted enacted in accordan accordance ce with Engineering Engineering Division Division Strategi Strategic c Plan, Plan, regardin regarding g the work of the pump piping. piping. (2) Writt Written en by :

(Pipin (Piping g En Engin ginee eerin ring g Team) Team) Koh Bong Hwan, Lee Joo Sang

Editoria Editorial l Supervis Supervisor or : Jeong Jeong Kyung Kyung Hwa 4

2006.11.10

(1) Matters in related with stress are revised. (2) Straight Straight-run -run in pump suction suction line is adjusted adjusted Writt Written en by : Sihong Sihong Shin Editorial Supervisor: Piping Standard Supervisor Department Approved by : H.M Im

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Typical Typical Arrangemen Arrangement t Drawing Drawing 1

1. PUMP PUMP SUCTIO SUCTION N LINE LINE 1.1 Horizo Horizonta ntal l (1)

(2)

5


1.2 Vertic Vertical al (1)

(2)

5


5

2. PUMP DISCHARGE DISCHARGE LINE 1.1 1.1

1.1/ 1.1/2B 2B and and Under Under

1.2 1.2

2B and and Lar Large ger r (1)

When check valv valve e is inst installe alled d in 6" and over si size ze di disch scharg arge e line, it is recommended to be installed horizontally to prevent prev ent vibr vibratio ation n caus caused ed by shut-dow shut -down n of pump pump. .


(2)

(3)

5


(4)

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SAMSUNG SEM 3074E Piping Design Manual Pump Piping

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