ML18018A821
| ML18018A821 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 06/20/1970 |
| From: | EBASCO SERVICES, INC. |
| To: | |
| Shared Package | |
| ML18018A805 | List: |
| References | |
| MNE-65, NUDOCS 8310130291 | |
| Download: ML18018A821 (9) | |
Text
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AtvPROVCL OY D<TC ISSVCtb I
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PIPE LTl E SIZ liG GUI E CttTIjresL~HA Wle 0 it S y S T C M Velocit Pre sure Dron Pine Wall Stress and Wall thichness Codes
- NSI B-3l.l Po"er Piping Code
- AS,"E - Boiler 6: Prcssure Vessel Code Section I
- ANSI B-31,7 huclcar Poser Piping References
- Crane Technical Paper 410
- Properties of Fluids, AS'.6 Stcam Tables, 1967 1 - Vcloci y - Usc for preliminary'r appro:.imat;e size only.
Availablc prcssure drop to bc used for final sizing,
', v tbt v 3.056 60 A d2 r
V ~ Velocity, ft/min M ~ Flow, lb pcr hour v ~ Specific volume, cu ft/lb, at estfn ted average operating conditions 4
Cross-sectional area based on avrrace inside dian tcr, sq tt d ~ Average ins-'de diameter of pipe, in~
Item Fossil Fuel Nuclear Rcnre of Velocities See Sheet.
2 for Numbered
~
Boa c 5,000 to 10,000 ft/min
~ )
DATE 6/ y jTrtt r ~
&fain St:earn 10,000 to 20,000 ft/min Hot Pehcat 6,000 to 20,000 ft/min Cold Reheat 5,000 to 15,000 ft/min Boiler Feed Discharge 10 to 25 ft/scc Boiler Feed Sucticn -
4 to 7 ft/sec Deaeration Installation
~Condcnsctc Pump 8 to 15 ft/sec Discharte Conden.ste Puce Suction 2 to 4 ftlscc oct-Heater Drain - Upstream 4 to 7 ft/scc - (No of Control Valve Flashing)
,0'0 'eater Drain - Do-w-4,000 to 20,000 ft/min
,'go stre~ of Control (Flashing)
QIQO Valve
.Heater Drain Pump Dis-8 to 15 ft/sec charge Heater Drain Pump to 4 ft/sec Suction V)A gn.
II Same Range of Vclo"itics as for Fossil Fuel Also for Boiler Feed Suc ion in a Dcst~rnting Condenser Installation TAede Stersc'yrtr Cts' te te their epoty to sa b't eo ttuw t or cyst et ~ So~I S ee Ota spectnc prejaCts StusC tel era<art ~ racy bar recusal or tpacslia8 try sjse centrect trr those ceres epprep jete crtter je
~ stsetl be epptnrerj c&rece c,'d'rr Nett-StmoertI Cr.torte ~ jeeete.
l (Gcnct al} (4/22/ 7l)
KCA~~O THCPAAL ACCOVttT HOe 8
~
2 t 3 263 2
St 3 3
1 164 PIPE LIN SIZI tG GUIDE (Sheet CDstSeuO S AteVeo
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CLICtrT PROJCCY CPARCO OY APPROVCO IY
~esv csee OATC ISSuCO 1 - Velocity (Cont'd)
Item PIPE LINE SIZING GUIDE Cont'd Oirr M
rr ARO OR SYSYCM Ran e of Velocit Fossil Fuel Nuclear See Numbered Notes Below xtraction
'Steam - Superheated 7,000 to 15,000 ft/min Extraction Steam - Saturated 4,000 to 10,000 ft/min xtraction Steam - Wet 4,000 to 7,000 ft/min isc Steam Service-7,000 to 20,000 ft/min Superheated isc Steam Service - Saturated 4,000 to 10,000 ft/min isc Steam Service - Wet 4,000 to 7,000 ft/min isc Water Service - Normal 4 to 10 ft/sec (depend-ing on material selected; use 4 to 5 ft/sec for
- brass, and 7 to 10 ft/sec for steel) cavy Oil (not applicable due to viscosity variation) 6 6 9 R2 ight Oil 4 to 10 ft/sec 7
uel Gas - Nominal 100 Psig 7,000 to 16,000 ft/zdn uel Gas 250 Psig 3,000 to 8,000 it/min IR2 otes:
1 - Use this velocity range unless the velocity or resultant pressure drop is limited by'the NPSH requirements of the pump, 2
For main systems, the pipe line sizes shall be based on an economic balance of pipe costs versus pumping costs, For computer program use Pipeline Sizing Program No, 059, 3 - For minor systems and miscellaneous small lines, the pipe line sizes shall be the smallest pipe that can be used with a pressure drop less than 2 psi per 100 equivalent ft.
4 - Drains to condenser and/or drains going to.lower pressure heater villbe a fleshing mixture with velocities not to exceed 20,000 ft(minute, t
5 - The maximum pressure drop in each system should be approximately 3 percent of extraction steam inlet pressure corresponding to the Maximum Calculated
'or Expected) capability (or Valves Wide Open Capability) ~
6 - The pressure at the pump suction must be at least 1 psi above atmospheric pressure.
7 The pressure at the pump suction must be above atmospheric pressure 8
The velocities in large diameter lov pressure stage extraction steam lines may be as high as 20,000 ft/min, 9 - Refer to Hydraulic Institute Standards curves for pressure drop charts at various viscosities,
- Same Range of Velocities as for Fossil Fuel These Stcerderd Desiin Criterio shell opply to srkject ~rtvipeent er system es ~ gene el yvide.
On spectlic projects specrol ctiterie rrroy be teovired or specihed by the controcto ln tllose coses oppopiote crirerie sholl be oppoved ond tee erded en Pten-Srondord Criterio sheets.
Evt 1 (General) {4/22/71)<ig'ev 2 (3/20/72) r EQASco THERitAL AccouHT Ho 8e 1 DATE 6 2
AP OVED cyiic MccrrsrricsL II CLCAR CNCII PIPE LINE SIZING GUIDE (Sheet 2 of 7)
EBASCO SERVICES )KCORPORATED MNE-65 STAHDARD DESICH CRITERIA ponre
~ 55 tIcv 5 11
, Accesyrishr Eboece Services Incerserered
Ct ICttY PIIOJCCY PAIICD ~ Y Jee ense APPttOVCD SY SVW Coen DAYC ISSUCD PIPE LINE SIZING GUIDE (Cont'd) cclvlp>
rr AnD on s ~ etc'
- Pressure Drop - The first calculation for pressure drop should be based on a reason-able velocity in the pipe line. If the calculated pressure drop in the system is more than 10K of the outlet pressure, then recal-culate the pressure drop in the system in sections.
Each section should be approximately 100 equivalent feet.
The pressure drop in the system can be changed by selecting a dif-ferent velocity, linc size and using more than one pipe for the total flow or any combination thereof.
Use the Darcy equation H ~ f in the following form to give psi of pressure LV D 28 drop for the pipe run:
3 36 x 10 f Q v L 6
2 d5 8 << Pressure drop, psi I
f ~ Friction factor - See Crane (Technical Paper 410 Copyright 1957) pp A-23, A-24 and A-25 L ~ Pipe Run in equivalent lineal feet -'ee Crane pp - A-27, A-30 and A-31 for determining equivalent length of bends, valves and fittings v ~ Specific volume, cu ft/lb, at estimated average operating conditions 9 <<Operating flow rate at operating conditions, lb/hr d ~ Average inside diameter df pipe, inches 9
Average value for f for commercial steel pipe for turbulent Slow may be obtained by using the following formula developed from the curve shown on Crane page A-23:
f <<20.92 x 10 x d f ~ Friction factor d ~ Average inside diameter of pipe, ihches Combining these equations, the equation for calculating pressure drop is:
7.029 x 10 Q v L 8 ~
(for fully turbulent flow only) d5 19
'These St<<nfenf Ossian Criterlo shell epply to s*tect ~rtet~t <<systetn os ~ tenorof Svbfe.
On specific projects speciel criterie rney be rertefrecf or specific( by the centroct. ln those cocos eppropieto crttertr sholl be opprc ect onrf reconfetf on Nen-Sternfenf Criterio sheets EVt 1 (General)
(4(22/71)i.l '-'n*Ceo TttcttstAI. AccDIIttT wo.
- 8. 1 DATE APPROVED 8/
CIIIEF ~lac ML NUCLCAo cttsn PIPE LINE SIZING GUIDE (Sheet 3 of 7)
EBASCO SERVICES INCORPORATED MNE-65 STAKOARO nESIGK CRITERIA ponts sss Itcv s01t Accesytlsht Ebetce Sereicee IncerseteteJ
'*>~'PI'Nfhv 'PNrreg,e)ew, rP.,
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CLIENT PIIOSCCT
~ r4tICD SY ree coco
>>PP>>DYCD SY
~ eeT coco DATC ISSIICD PIPE IINE SIZING GUIDE (Cont'd)
CQUIPLICNT AND/Dn sTsTCII 2>> Pressure Drop (Cont')
The average inside pipe diameter for any specified pressure drop in the syst: em can be calculated directly by transforming this equation to:
Note:
For determining the pressure drop in standard weight (Schedule
- 40) pipe for cold water and compressed air systems, use the tables as shown in Crane pp B-14 and B-15 respectively.
For other than standard weight pipe, the pressure drop must-be calculated in accordance with the above.
For highly pressurised systems, it may be necessary to ad)ust the calculated pre-sure drop to compensate for compressibility of the fluid.
Compensation is not normally required for boiler feed pump discharge systems.
ditional Notes a - Maximum pressure drop (1)
Main Steam - 90 percent of allowable pressure drop at Maximum Calculated (or Expected) Throttle Flow between superheater outlet and high pressure turbine inlet.
(2)
Hot Reheat and Cold Reheat - 100 percent of.allowable pressure drop at flow corresponding to Maximum Calculated (or Expected) Throttle Flow between high r
pressure turbine outlet and low pressure turbine inlet minus pressure drop through reheater.
Approximate ratios - pressure drop in the hot reheat piping is between 2 and 4 times the pressure drop in the cold reheat piping, based on typical results from economic evaluations.
(3)
Heater Drains - Preliminary Line sising at flow corresponding to Maximum Oalcu-lated (or Expected) Throttle Flow ~ From receiver to control valve inlet, use 1 PSI pressure4drop plus or minus static head.
From control valve outlet to its downstream receiver use 3 PSI pressure drop plus or minus static head.
~Those st>>4>>lord Desrpn criterio shel I opply to ~ akject eqvitN>>tnt or systerir es o ce>>erst CII/de4 0>> specillc projects spec iol criIerio>>cty be rerpr/red or specllied by the cenrroct4 ln those <<ores opprepiote crlterle sholl he op/r4rrredo>>drecorded e>> i/o>> Sto>>dord Crlterio sheets KYI 1 (General)
(4/22/71)
~ ~~
SSACCO TIIKIISIAI-ACCOUNT SIO.
- 8. 1 DATE 2 70 APPROVED 4C J.4,
~ 'lt CNIC CCNINICAL NIIcLcso coco pD>>tc oss Acv ~ 471 PIPE LINE SIZING GUIDE Sheet 4 of 7 EBASCO SERVICES lHCORPORATED CopyriCht fhesce Services I>>csrpereted MNE-6~
STAIIDARD DESIGN CRITERIA
p/I. ty CLICIIT PIIOJCCT KP *IICD ~ V OVCD DY DATC ISS UCD 2
Pressure Drop (Cont'd)
~a'r~*o. o c
a - Maximum pressure drop (Cont'd)
(3)
(Cont'd)
For heater drain piping from the outlet of the control valve, the suggested pipe schedule shall be one schedule heavier than the standard weight schedule.
The suggested 'material shall be chrome molybdenum in accordance with ASTH A-335 Gr P ll.
The pipe run of the heater drain piping from the control valve outlet shall be is short as possible.
(4)
Extraction Steam - 100 percent of allovable pressure drop betveen turbine
'nozzle and extraction feedvater inlet nozzle at flow corresponding to Maximum Calculated (or Expected) Throttle Flov.
3 - Pipe Mall Stress See the applicable codes for the allovable pipe vali stresses.
Use straight line interpolation for stress values falling between various temperature intervals indicated in the Codes.
4 - Minimum Mall Thickness - See Note (a) on Sheet 6
Use the following equations:
Based on OD PxD m
2(SE+ Py)
ID ~ Maximum inside diameter of pipe, in.
D ~ Maximum outside diameter of pipe, in.
P ~ Design pressure, psi Based on ID - See Note b
on Sheet 6
PxID+ 2 SEC+
2 PC m
2 (SE+ Py-P) r m
SE ts Calculated minimum pipe vali thickness, in. - See Note (c) on Sheet 7
hllovable stress in material due to internal pressure at the design temperature, psi.
C p hllovance for minimum structural stability p 0.065" for 1/2 to 3-1/2 in. nominal pipe size
~ 0.000" for 4 in. nominal pipe size and larger RKVI These Stondord Oesittn Criterro shell otrtriy to subject okrr~t or systere os o ttenerol Crride, On specilic Protects streciol ctiterio rrroy be r<<trrired or sPeci/iod by the controcti In those esses oPpoPrioto crkotio
~hell be oppored ond recorded on Non-Stondord Crlterio sheets.
KbASCO TIIEIIIIALACCOVIIT NO. 8 ~ 1 bATE I ?C 7P AP QV CNI SIKCNANICAL NIICLfsk Cksk PIPE LINE SIZING GUIDE MNE-65 (Sheet 5 of 7)
STAHDARD DESIGH CRITERIA KBASCO SERVlCKS lHCORPORAT.ED POIIM ~ SS IICV S ~tl cotryrisht Ebesco Servrces Inceo<<ot<<
Cl ICHY ptecpAIeco OY Joo coco PreOJCCT APPIeOY CD OY oow coco OAYC ISSUCD PIPE LINE SIZING GUIDE (C
~
/
Qol Melt astor ole sess cM 4 - Minimum Wall Thickness (Cont'd)
. B ~.038<< for pipe ordered to specified machined ID with tapered backing ring and extruded pipe specified by ID with tapered backing ring.
~,000" for the above pipe with flat backing ring or other types of pipe with any design guide M-4 backing ring.
y or a coefficient having values as follows:
Tem F
900 and Below 950 1000 1050 1100 1150 and Above
- Ferritic Steels 0.4 0.5 0.7 0.7 0.7 0.7
~Austenftic Steels 0.4 0.4 0.4 0.4 0.5
0.7 Notes
(a) - For atmospheric or open ended discharge the internal and thrust forces "
shall be factored into the determination of the fnlet nozzle pipe size and its corresponding minimum wall thickness.
See Design Guide M4-23 for specific design of Nozzles for Safety and Relief Valves.
(b) - Use maximum possible inside diameter allowable under the ASTM specifica-tion with all its tolerances on wall thickness and outside diameters, except foz the following:
For Pi e Ordered to S ecified Machined ID i - For tapered backing ring use maximum machined ID ts ID+.086<<
ii - For flat backing ring use maximum ID ID +.01<<
For Extruded Pi e S ecified b ID ii - For flat backing ring use maximum ID Cameron Extruded Pi e Mfr ID Tol 6tt to 22tt 1/8tt es 0tt Over 22ts to 30<<
+
5/32" - 0" Over 30<< to 42<<
+
3/16
- 0<<
(c) - (Sce page 7)
- Carbon steel and intermediate, Croloys (Chrome Moly)
~ St'sinless Steel i - For tapered backing ring use maxfmum machined ID ot ID + Mfr ID Tol
+ ;076<<
ss ID + Mfr ID Tol RKvt DATE /
These Stondord Design Criterso shell opply to s*iect eqtriprnent or system os o general ~ slide.
On specÃic prolects specief ctitelio trey be rettsrired or speciAed by the controct. in those coses opprotsiote crsterio shell be oppressed ond recorded on pion-Stondold Criterio sheets.
Eshsco THctttlALAccoUNT No.
CCH*H ICAL tt Lese Coco poleM oss Iecv o t t PIPE LINE SIZING GUIDE (Sheet 6 of 7)
EBASCO SERVICES INCORPORATED C
py eh'b" MNE-65 STAHOARO DKSIGM CRITERIA
CLtCNT p/4, 6' ROJCCT PRCPAtfCD OT tee shee APPtfDVCD OY
~uoe chen OATC ta a frCD Notes:
(Cont 'd)
(c) - Select nominal wall thickness of pipe by adding mill tolerance to calculated minimum wall, and choosing the next highest standard wall thickness available from Manufacturer.
lJ S Mill tolerance for seamless pipe is 12-1/2 percent of nominal wall thickness, and for plate pipe is 0.010 in.
REVt DATE I ~
g t
These Stondord Desioh Crtterle shell oppfy to subiect equs'preent or system or 4 Itenerol Ituide.
On specilic proiects spec iol criterio moy be required or specilred by the controct ln those coses opproprioto criterio shall be opprored ond recorded on Hon-Stondord Crrtorio sheets.
KOASCO THKtfMAI ACCOUNT NOr
<ptnet 7 of 7)
AP OVED Cttt tsCCIIAIIICAL oucLcsq chaff tIOffsf asj Ncu 4 y f PIPE LINE SIZING GUIDE KSASCO SERVICES IHCORPORATED Cepyrifihf Ebeaf4
$erusc ~ 4 Ihfersereted MNE-6s STANDARD DESI Gtl CRITERIA
~see~