Patent AU-2015224531-B2 (AU)
Title: Method of extending life expectancy of high-temperature piping and life expectancy extension structure of high-temperature piping
Inventor: WATANABE DAIGO
IPC: G01N17/00
Filed: 2015-01-15
Granted: 2016-08-11
Abstract: (10) 0 h f (43) MH 2 W0 2015 11 i 19 H (19.11.2015) W O 2015/174101 Al WIPOI PCT (51) MRM$$$390: 9E - IA 4 " A $ Tokyo (JP). !!A ;W F16L 58/02 (2006.01) G01N17/00 (2006.01) (KANEMAKI, Yuichi); T 1088215 F16L 57/00 (2006.01) T H 1 6 5 1 T A $ A (21) M : REPCT/JP2015/050882 Tokyo (JP). X ;]J f(1(OHYAMA, Hiroyuki); T 1088215 13-SOA FIAtJ- T N 1 6 # 5 = (22) M t1gE: 2015 Pl 1 J 15 E(15.01.2015) I Tokyo (JP). $2 t A (MATSUMOTO, Shintaro); T 1088215 #_IF, (25) M W R n: 64 -1Z T M 1 6#5F E It dt &$ (26) Pjf®0 : 84) Tokyo (JP). A E D (FUJITA, Masaaki); T 1088215 NS T 1 6#5- (71) t &: E i~ - A rT .* X $ A tt IR Tokyo (JP). Xj$ (MITSUBISHI HITACHI POWER SYSTEMS, LTD.) (OHTSU, Ichiro); T 1088215 13 I$ ;Th91A T H [JP/JP]; T 2208401 l1 1 61* 5 A E214 1t$1 Tokyo (JP). i,'\ET 0 3~ 1 5 Kanagawa (JP). G L NE T 3 #1 -FY Kaagaw QP_ (74) It I|T A : lli# 4 -ME , 3r (SAKAI, Hiroaki et al.); T (72) I : X IA(WATANABE, Daigo); T 1000013 1,-T-It EM fi N 3 T H 8# 1 1088215 M t AJZ T H 1 6 5 E g gt[)L--( >tif g Xgegg5 I$ Tokyo (JP). t 4$ 3Z J22 t R~f Tokyo (JP). (SAKATA, Fumitoshi); T 1088215 3 N -A ZT~ 6~5 E I ~ ~ t~ (81) t0)L' $ y ±cStLA6D 6D Tokyo (JP). Iii L 15 (TOKIYOSHI, Takumi); T hJ iIf): AE, AG, AL, AM, AO, AT, AU, AZ, BA, 1088215 13T, hFA JZ T H 1 6 # 5 - BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, I Tokyo (JP). r JR, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, (CHUMAN, Yasuharu); T 1088215 JT, P igg Fl, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, - T H 1 6 # 5 =AM E* A $ IR, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, Tokyo (JP). iR fF) tl (FUKAHORI, Takuya); T LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, 1088215 13-T, 0 FAA T H 1 6 # 5 F MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, (54) Title: METHOD FOR EXTENDING LIFE OF HIGH-TEMPERATURE PIPING AND LIFE-EXTENDING STRUCTURE FOR HIGH-TEMPERATURE PIPING (54) 59B]A)®' FT : R ZEW9) [IP71RL m' ZEW9)K 1115 1 4 1 3 (57) Abstract: If it is determined that steady continued (- t 100C) AA use is not possible according to a remaining-life evalu ation at a weld section of high-temperature piping based on creep ruptures, insulation material covering a site of the high-temperature piping at high risk of creep rupture is partially removed to locally lower the temperature of the outer surface of the high-temperat ure piping and extend the life of the site at high risk of BB =15= creep rupture. In addition, the width of an exposed t t(600*C) part where said insulation material was partially re moved is at least twice the distance where the change in stress between the tensile stress and compressive stress generated on the high-temperature piping due to 12 removing said insulation material from the stripped 11 end of the exposed part changes from tensile stress to compressive stress and the compressive stress sub sequently approaches zero. The distance where said compressive stress approaches zero after the tensile o2 stress changes to compressive stress is calculated ac 3(- v ) - - (2) cording to formula (1). jx=5 (1), where 0 is represen Sa2 h2 ted by formula (2). Here, v is the Poisson ratio, a is the average radius of the piping, and h is the thickness of AA (Outside air: 1OOC) the piping. BB Boiler steam (6000C) (57) Effe: W O 2 0 15/17 4 10 1 A 1|l II |IIll|||1lIllllllII 1|||||||||||||||||||lID|||II||DID|II|I|||I||||I|||||||||||I| SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, %1J->%tM: UG, US, UZ, VC, VN, ZA, ZM, ZW.-(fiJ 2 3) (84) t ®tiL-Y ±®®±I { ®tDE®At'iBW tY 5-9 ffi 13 .IB): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), .-L - 48.2(h)) 5 $/ 7 (AM, AZ, BY, KG, KZ, RU, TJ, TM), E - h A 2 1 (2)(a) I ) M- 'V / (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, Fl, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV,A rJ 1) P MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Et -*El $&f50);o310 ' 7 )-~ 0)0)9%8%2 00), fO tff ifflt$Lki *1 f=[ , r ®E W ;#w ®J -- P'J V ) 0 1 r *, L - L, f E*- 3tt L ,MiBt3W M-im R f Ic4-F 8 t, ' ' -IA') ® 9ONL'Mfrt®®0%I % 1 tA t2 M~E{ja*4 tO9 W$@ift.UV1ff 2 LABa±&A Uki ~EI& tt' AZtot L UtzBa G, iBik@i Zt -&O Ic$iB fa -3 o .~mi rm-3i 2 f2m rm- .i ~ a ~ tkBCt1EM hft~mi -b VIt. ~FEBJ (1) 7,b x=5 - - (1) p *i FT (2) ±St (Z - -JC, v 4-i7 '} './b j U) , a I 0® -1J-It, h IAt &O4wTA 24A