Readme Supplement. Version 7.40
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- Letitia Black
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1 Redme upplemen Versin 7.40 Disclimer Plese red he fllwing crefully: This sfwre nd his dcumen hve been develped nd checked fr crrecness nd ccurcy by T ysems, Inc. (T) nd InfPln Technlgies Pv. Ld. (InfPln). Hwever, n wrrny, expressed r implied, is mde by T nd InfPln s he ccurcy nd crrecness f his dcumen r he funcining f he sfwre nd he ccurcy, crrecness nd uilizin f is clculins. Users mus crry u ll necessry ess ssure he prper funcining f he sfwre nd he pplicbiliy f is resuls. All infrmin presened by he sfwre is fr review, inerprein, pprvl nd pplicin by Regisered Prfessinl Engineer. CAEPIPE is rdemrk f T nd InfPln. CAEPIPE Versin 7.40, 015, T ysems, Inc. nd InfPln Technlgies Pv. Ld. All Righs Reserved. T ysems, Inc. Tel: (408) Technlgy Drive, uie 36 Fx: (408) n Jse, Clifrni Emil: inf@ssus.cm UA InfPln Technlgies Pv. Ld. Tel: , Crescen Rd Fx: Bnglre Emil: ipln@vsnl.cm Indi
2 Annexure A Cde Cmplince
3 Allwble Pressure Pwer Piping AME B31.1 (014) A his ime, here is n prvisin in CAEPIPE specify he ype f pipe cnsrucin, i.e., wheher he pipe is semless r lngiudinl welded r spirl welded. Accrdingly, irrespecive f he ype f pipe cnsrucin, CAEPIPE clcules llwble pressure s fllws. Fr srigh pipes nd bends wih semless cnsrucin r designed fr susined perin belw he creep rnge, Eq. (9) f pr is used s given belw cmpue llwble pressure. P D E Y Fr srigh pipes nd bends designed fr susined perin wihin he creep rnge, Eq. (11) f pr is used s given belw clcule llwble pressure. where P = llwble pressure P EW D Y E = llwble sress s given in Appendix A f B31.1 (01) Cde, where E = weld jin efficiency fcr r csing quliy fcr s given in Tble = vilble hickness fr pressure design = n (1 - mill lernce/100) - crrsin llwnce (Any ddiinl hickness required fr hreding, grving, ersin, crrsin, ec., shuld be included in crrsin llwnce in CAEPIPE) n = nminl pipe hickness D = uside dimeer f pipe d = inside dimeer f pipe The Pressure cefficien Y is implemened s per Tble (A). In ddiin, Y = 0.0, fr cs irn d Y, if D / < 6, fr ferriic nd useniic seels designed fr emperures f 900 F (480 C) d nd belw D W = weld srengh reducin fcr s per Tble Refer Annexure B fr deils n Weld srengh reducin fcr implemened in CAEPIPE. Fr clsely spced mier bends, he llwble pressure is clculed frm Eq. (C.3.1) f pr where r = men rdius f pipe = (D - n )/ R = equivlen bend rdius f he mier P E ( R r) r( R r / )
4 Fr widely spced mier bends, he llwble pressure is clculed frm Eq. (C.3.) f pr P r( E 1.5 n r ) Where, = mier hlf ngle usined ress The sress ( L ) due susined lds (pressure, weigh nd her susined mechnicl lds) is clculed frm Eq. 15 f pr where L PD 4 P = mximum f CAEPIPE pressures P1 hrugh P10 D = uside dimeer n = nminl wll hickness n 0.75iM Z A i = sress inensificin fcr. The prduc 0.75i shll n be less hn 1.0. M A = resuln bending mmen due weigh nd her susined lds Z = uncrrded secin ; fr reduced ules, effecive secin s per pr h = h llwble sress mximum CAEPIPE emperure [i.e., mx (Tref, T1 hrugh T10)] Occsinl ress The sress ( L ) due ccsinl lds is clculed frm Eq. 16 f pr s he sum f sress due susined lds ( L ) nd sress due ccsinl lds ( ) such s erhquke r wind. Wind nd erhquke re n cnsidered cncurrenly. where P D 0.75iM pek A B L 1. 4 n Z Z h 0.75iM M B = resuln bending mmen n he crss-secin due ccsinl lds such s hruss frm relief / sfey vlve lds, frm pressure nd flw rnsiens, erhquke, wind ec. P pek = pek pressure = (pek pressure fcr in CAEPIPE) x P Expnsin ress Rnge (i.e., ress due Displcemen Ld Rnge) The sress ( E ) due herml expnsin is clculed frm Eq. 17 f pr where M C = resuln mmen due herml expnsin A f ( 1.5C 0.5 h ) E im Z C, frm Eq. (1A) f pr (B) f cyclic sress rnge reducin fcr frm Eq.(1C) f pr (B), f 6/N 0. <= 1.0 nd f >= 0.15 wih N being he l number f equivlen reference displcemen sress rnge cycles expeced during he service life f he piping C = bsic llwble sress s minimum mel emperure expeced during he displcemen cycle under nlysis A h
5 h = bsic llwble sress s mximum mel emperure expeced during he displcemen cycle under nlysis When h is greer hn L, he llwble sress rnge my be clculed s A f [ 1.5( C h ) L ], frm Eq. (1B) f pr (B) This is specified s n nlysis pin: Use liberl llwble sresses, in he menu Opins->Anlysis n he Cde b f CAEPIPE. Ne: Refer Annexure C fr he deils f Thickness nd he ecin Mdulus used fr weigh, pressure nd sress clculins.
6 AME B
7 AME B
8 AME B
9 AME B
10 AME B
11 Allwble Inernl Pressure Prcess Piping AME B31.3 (014) Fr srigh pipes nd bends, he llwble pressure is clculed using Eq. (3) fr srigh pipes nd Eq. (3c) wih I = 1.0 fr bends frm prs nd respecively. P EW D Y where P = llwble pressure = llwble sress s prvided in pr () nd s per Tble A-1 E = jin fcr (inpu s meril prpery) frm Tble A-1A r A-1B frm pr nd pr W = Weld Jin rengh Reducin Fcr frm pr (e) nd s per Tble is implemened in CAEPIPE s fllws. T mx belw denes mximum pering emperure (i.e., mx f T 1 hrugh T 10 nd T ref in CAEPIPE). Wih Meril Type in CAEPIPE = C [CrM] W = 1.0 wih T mx <= F (r 47 0 C) W = 0.64 wih T mx > F (r C) nd Fr T mx > F (r 47 0 C) nd <= F (r C), he vlues f W re ken frm Tble W fr inermedie emperures re linerly inerpled. Wih Meril Type in CAEPIPE = F [CEF (ubcriicl)] W = 1.0 wih T mx <= F (r 48 0 C) W = 0.5 wih T mx > F (r 48 0 C) Wih Meril Type in CAEPIPE = A r NA W = 1.0 wih T mx <= F (r C) Fr T mx > F (r C), he vlues f W re ken s per Tble W fr inermedie emperures re linerly inerpled. Wih Meril Type in CAEPIPE = W = 1.0 wih T mx <= F (r C) Fr Oher Meril Types in CAEPIPE W = 1.0 wih T mx <= F (r 47 0 C) W = (T mx T cr ) fr T mx > F (r 47 0 C) nd <= F (r C) where, T cr is ken s F = vilble hickness fr pressure design = n (1 - mill lernce/100) - crrsin llwnce c (Any ddiinl hickness required fr hreding, grving, ersin, crrsin, ec. shuld be included in crrsin llwnce in CAEPIPE) n = nminl pipe hickness D = uside dimeer
12 d = inside dimeer Y = Pressure cefficien frm Tble , vlid fr < D/6, nd d c Y, vlid fr D / 6 D d c Fr clsely spced mier bends, he llwble pressure is clculed using Eq. (4b) frm pr where r = men rdius f pipe = (D - n )/ P EW ( R r) r( R r / ) R = effecive bend rdius f he mier (see pr f cde fr definiin) Fr widely spced mier bends, he llwble pressure is clculed using Eq. (4c) frm pr s where = mier hlf ngle usined ress P r( EW 1.5 n r The sress ( L ) due susined lds (pressure, weigh nd her susined mechnicl lds) is clculed using Eq. (3) nd (3b) frm pr. 30. nd pr (c). ) L ( ) b ( ) h where I F Ap susined PD 4 s R A p usined b ( I M ) i i Z ( I m M ) usined IM Z m usined P = mximum f CAEPIPE inpu pressures P1 hrugh P10 D = uside dimeer s = wll hickness used fr susined sress clculin fer deducing crrsin llwnce frm he nminl hickness s = nminl hickness crrsin llwnce in CAEPIPE, s per pr A crrded crss-secinl re f he pipe cmpued using s s per pr p I lngiudinl frce index = 1.0 F lngiudinl frce due susined lds (pressure nd weigh) R = xil frce due weigh
13 I in-plne sress inensificin fcr; he prduc f.75ii i I u-f-plne sress inensificin fcr; he prduc f.75i I rsinl mmen index = shll n be less hn shll n be less hn 1.0 M in-plne bending mmen due susined lds e.g., pressure nd weigh i M u-f-plne bending mmen due susined lds e.g., pressure nd weigh M rsinl mmen due susined lds e.g., pressure nd weigh Z m = crrded secin s per pr. 30.1; fr reduced ules / brnch cnnecins, effecive secin h = h llwble sress mximum emperure [i.e., Mx(Tref, T1 hrugh T10)] usined plus Occsinl ress The sress ( L ) due susined nd ccsinl lds is clculed s he sum f sress due susined lds such s due pressure nd weigh ( L ) nd sress due ccsinl lds ( ) such s due erhquke r wind. Wind nd erhquke re n cnsidered cncurrenly (see pr ()). Fr emp <= 47 0 C r F L h Fr emp > 47 0 C r F 0. 9 L W y where L L O, where L is cmpued s bve, nd ( b ) ( ) I F Ap ccsinl ( P P) D 4 pek s R A p Occsinl b ( I M ) i i ( I Z m M ) Occsinl I M Z m Occsinl P pek = pek pressure = (pek pressure fcr in CAEPIPE) x P R = xil frce due ccsinl lds such s erhquke r wind M in-plne bending mmen due ccsinl lds such s erhquke r wind i M u-f-plne bending mmen due ccsinl lds such s erhquke r wind M rsinl mmen due ccsinl lds such s erhquke r wind y = yield srengh mximum emperure (i.e., mx(t ref, T 1 hrugh T 10 ) W = 1.0 fr Auseneic sinless seel nd 0.8 fr ll her merils s per pr ()
14 Expnsin ress The sress ( E ) due herml expnsin is clculed using Eq. 17 frm pr E ( ) b ( ) A where I F A Expnsin b ( I M ) i i ( I M ) Z Expnsin I M Z Expnsin A un-crrded crss-secinl re f he pipe/fiing cmpued using nminl hickness n nd uer dimeer D, s per pr I xil sress inensificin fcr = 1.0 fr elbws, pipe bends nd mier bends nd I = i fr her cmpnens s lised in Appendix D f B31.3 (01) F rnge f xil frces due displcemen srins beween ny w herml cndiins being evlued I in-plne sress inensificin fcr i I u-f-plne sress inensificin fcr I rsinl sress inensificin fcr = 1.0 M in-plne bending mmen i M u-f-plne bending mmen M rsinl mmen Z = uncrrded secin s per pr ; fr reduced ules/brnch cnnecins, effecive secin s per pr (c) A f ( 1.5C 0.5 h ), Eq. (1) f pr (d) f sress rnge reducin fcr frm Eq. (1c) f pr (d) = 6N -0. where f >= 0.15 nd f <= 1.0 (see Ne 1 belw) C = bsic llwble sress s minimum mel emperure expeced during he displcemen cycle under nlysis h = bsic llwble sress s mximum mel emperure expeced during he displcemen cycle under nlysis When h is greer hn L, he llwble sress rnge my be clculed s A f [ 1.5( C h ) L ], Eq. (1b) f pr (d). This is specified s n nlysis pin Use liberl llwble sresses, in he menu Opins->Anlysis n he CAEPIPE Cde b.
15 Nes: 1. As per pr (d), f = mximum vlue f sress rnge fcr; 1. fr ferrus merils wih specified minimum ensile srenghs <= 517 MP (75 ksi) nd Mel emperures <= C (700 0 F). This crierin is n implemened in CAEPIPE s he prvisin fr enering he minimum ensile srengh in meril prpery is n vilble his ime. Hence f <= 1.0 fr ll merils including Ferrus merils.. Refer Annexure C fr he deils f Thickness nd he ecin Mdulus used fr weigh, pressure nd sress clculins.
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20 Annexure B Weld rengh Reducin Fcrs buil in CAEPIPE (s given in Tble f AME B )
21 Weld rengh Reducin Fcrs pplied fr clculing he Allwble Design Pressure f cmpnens (exrced frm Tble f AME B ). Weld rengh Reducin Fcr fr Temperure, Deg F (Deg C) l. N. eel Grup (371) (399) (47) (454) (48) (510) (538) (566) (593) (61) (649) 1 Crbn eel (C) Ferriic eels (F) 3 Auseniic eel (A) [cnd. in ne belw] 4 Merils her hn hse sed frm l. Ns Nes: 1. NP = N permied. Fr Auseniic eels (including 800H nd 800 HT) he vlues up 1500 deg F re s fllws: Temperure, deg F Temperure, deg C Weld rengh Reducin Fcr
22 Annexure C Thickness nd ecin Mdulus used in Weigh, Pressure nd ress Clculins fr AME B31.x Cdes
23 Priculrs Allwble Pressure Pipe Weigh usined ress Expnsin ress Occsinl ress B31.1 (014) Pipe Thickness used Nminl Thk. x (1-mill lernce/100) Crrsin llwnce Nminl Thickness Nminl Thickness - Nminl Thickness ecin Mdulus used - - Uncrrded ecin Mdulus; Fr Brnch, effecive secin Uncrrded ecin Mdulus; Fr Brnch, effecive secin Uncrrded ecin Mdulus; Fr Brnch, effecive secin B31.3 (014) Pipe Thickness used Nminl Thk. x (1-mill lernce/100) Crrsin llwnce Nminl Thickness Nminl Thickness - Crrsin llwnce - Nminl Thickness Crrsin llwnce ecin Mdulus used - - Crrded ecin Mdulus; Fr Brnch, effecive secin Uncrrded ecin Mdulus; Fr Brnch, effecive secin Crrded ecin Mdulus; Fr Brnch, effecive secin B31.4 (01) Pipe Thickness used Nminl Thk. x (1-mill lernce/100) Crrsin llwnce Nminl Thickness Nminl Thickness - Nminl Thickness ecin Mdulus used - - Uncrrded ecin Mdulus; Fr Brnch, effecive secin Uncrrded ecin Mdulus; Fr Brnch, effecive secin Uncrrded ecin Mdulus; Fr Brnch effecive secin B31.5 (013) Pipe Thickness used Nminl Thk. x (1-mill lernce/100) Crrsin llwnce Nminl Thickness Nminl Thickness Crrsin llwnce - Nminl Thickness Crrsin llwnce ecin Mdulus used - - Crrded ecin Mdulus; Fr Brnch, effecive secin Uncrrded ecin Mdulus; Fr Brnch, effecive secin Crrded ecin Mdulus; Fr Brnch, effecive secin
24 Priculrs Allwble Pressure Pipe Weigh usined ress Expnsin ress Occsinl ress B31.8 (01) Pipe Thickness used Nminl Thk. Nminl Thickness Nminl Thickness - Nminl Thickness ecin Mdulus used - - Uncrrded ecin Mdulus; Fr Brnch, effecive secin Uncrrded ecin Mdulus; Fr Brnch, effecive secin Uncrrded ecin Mdulus; Fr Brnch, effecive secin B31.9 (008) Pipe Thickness used Nminl Thk. x (1-mill lernce/100) Crrsin llwnce Nminl Thickness Nminl Thickness - Nminl Thickness ecin Mdulus used - - Uncrrded ecin Mdulus; Fr Brnch, effecive secin Uncrrded ecin Mdulus; Fr Brnch, effecive secin Uncrrded ecin Mdulus; Fr Brnch, effecive secin Ne: 1. Crrsin llwnce includes hickness required fr hreding, grving, ersin, crrsin ec.. Uncrrded secin = secin clculed using he nminl hickness. 3. Crrded secin = secin clculed using he crrded hickness crrded hickness = nminl hickness crrsin llwnce 4. Effecive secin = secin clculed using effecive brnch hickness, which is lesser f i i b r h where, b = brnch nminl hickness, h = heder nminl hickness, i i = in-plne IF brnch
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