Tcvn 7704: 2007 nồi hơi yêu cầu về thiết kế, kết cấu, chế tạo, lắp đặt, sử dụng và sửa chữa

Tcvn 7704: 2007 nồi hơiyêu cầu về thiết kế, kết cấu, chế tạo, lắp đặt, sử dụng và sửa chữa

TCVN TrEU cHuAr.r euoc'c TCVN 7704 :2007 Xudt bin ldn 1 IA i\ c6l-c,rvcO-mraffi HUAN rurfn KTAT rAo o6nc rfurguKrtMsofr $0: .,FflciI,.;.M -Tr -Tcv NOI HOI - YEU CAU KY THUAT VE THIET KE, KET CAU . ,t ,-' cHE.TAo, r-Ap DAr, s0 ouNG vA sUA cHOA Boilers - Technical rcquirement of design, co n stru cti o n, m a n ufa ctu re, in sta I I ati o n, operati o n, m a i nte n a n ce HA NOI - 2010 CotiC; .fy c0 pniru zuEta nniu vi i{ijl tri I_LlYtr.N KT'AT I q,o nouc TAI L{}ITI KIKM S.SfYN Trang 1 Ph?m vi 6p dr;ng , 5 2 Tiri lieu viqn d5n :, 5 3 ThuQt ng&, dinh nghTa vd kV hiQu,, 4 Kim loai chd tqo, l5p d{t, sfia ih0a ndi noi 10 4.1 YOu cdu chun9 , 10 4.2 Quy dinh vd vQt liQu dirng trong chd tao, ldp d{t, s&a ch0a 11 5 YOu cdu vd kdt-cdu ndi froi " 11 5.1 YOu cdu chun9 ,., 11 5.2 ThAn hinhtrr,r bao hoi, bao nu6c, dng g6p, ndi hoi , , 11 5.4 Mdt sAng dng 16 5.5 Hirn dng v6ithAn hinh trq, v6i d6y, , ,.16 5.6 dng ld 16 5.7 Cac 15 chui nguoi, 16 chui ddu v2r 16 thd tay 16 5.8 Mr?c nudc , 18 5.9 Ndp phong nd , 18 5.10 B0 ham nudc 18 5.11 BQ qu6 nhi6t, t6i qu6 nhi6t 19 5.13 C6c phudng ti6n do kidm 19 5.14 Thi6t bi cdp nu6c cho ndi hdi , 19 6 C6c y6u cdu vd tfridt kd vA tinh dQ bdn cac b6 phAn chiu 6p h1c c0a ndi hdi 24 7 Citc y6u cdu vd chd tgo ndi hdi ,., , "31 8 C6c y6u cdu vd t5p ifflt, sfi dung, sfia ch[ta 32 8.1 Y6u cdu vd nhi dft ndi hoi 32 , 8.2 Y€u tdu vd chidu s6n9 33 8.3 Vltrf ndi hdi '34 8.4 Y6u cdu vd s?rn thao t6c vir cdu thang ' ' "'35 8.5 He thdng cdp nhi6n liQu - thAi tro xi,, ." '.' 36 8.6 Ldp d{t, s&a ch0a ndi hdi ",.'36 8.7 YOu cdu vd s& dr,lng 38 8.8 Td chfc sfra chta ndi noi '.'40 9 Ydu cdu vd chd dQ nu6c cdp - nu6c 6 nen trong ndi hdi '40 10 Gi6m s6t chd tao vd th0 nghiQm '.'."'.44 10.1 Gi6m sdt chdt?o ".' '.'.44 fi.2 X6c dinh 6p sudt thfi thrly lvc sau khi chd tao '.' 45 10.3 Trinh tuth&th0y luc sau chdl?o 46 rc.4 X6c dinh kdt qu6 thfi th0y lr,rc sau chd t?o , , 46 11 Kidm dinh sau khi l5p det vd trong qu6r trinh sfr dung ., "47 11.1 Nhfng quy dinh chung , '."""47 11.2 Nhffng quy dinh vd t<idm dinh sau khi ldp dft vd trong qudr trinh sfr dqng ,. ' '.47 1 1.3 X6c dinh 6p sudt th0 th{ry lyc sau khi l5p d{t vir trcng qu6 trinh sfi dqng 48 11.4 Trinh tr,l thfl th0y luc , 51 11.5 X6c dinh kdt qu6 thfithfry l{c ,.,. "' '.".'51 11.6 Didu tra sucd vlr tai ngn lao dQng c6li6n quan ddn thidt bi ndi froi ' ,' '."51 Phu luc A (qui dinh) - Nhiet d9 tinh to6n c0a thinh cdc bo phan ndi hoi "" '52 Phg luc B (tham khAo) - Thdrnh phdn ho6 hoc vi cd tinh c0a m6t sd mric thep tdm , : ".55 Thrt muc tii liArr thann kh6o ,.75 TGVN 7704:2007 ) Ldi n5i ddu TcvN 7704:2007 thav rhdcho TcvN 6004: 1995; TCVN 6005: 1995; TCVN 6006: 1995; TCVN 6007: 1995. TCVN 7704 :2007 do Ban k! thu6t ti6u chudn TCVNT Te 1_1 Ndi hoi vi binh chiu 6p ft,rc bi6n soan, Tdng cr,rc Ti6u chudn Do ludng chdt luong dd nghi, 86 Khoa hgc vi Cdng ngh6 c6ng bd. Treu cnuAru ouoc GtA Xudt bin ldn 1 Ndi hdi - Y6u cdu k! thuft ve'tnie't k6, ket cdun chdt?o, liip dit, sfr duno vi s-&a eh-fra -:"'g Boiters- Technical requirement of design, construction, manufacture,installation,operation and maintenance 1 Phqm vi 5p dqng 1.1 Ti€u chudn niry quy dinh c6c y6u cdu vd tfridt kd, chd tqo, l5p dft s& dung vir srla ch0a c6c thidt bi ndi hoi c6 Ap sudt lirm viQc c0a hoi l6n hon 0,07 MPal vi c5c ndi dun nu6c n6ng c6 nhiQt dO crla nuoc ldn hcvn 115 oC. 1.2 Ti6u chudn nAy kh6ng 6rp dung cho: a) Ndi hdi c6 6p sudt l6n hon 0,07 MPa nhrnrg dung t(ch chGa hoi vA nu6c kh6ng quir 25lit vir tich sd gi0a dung tich (tinh bbng lit) vd 6p sudt (tinh bing MPa) kh6ng qu6 20; b) Ndi hoi ddt bing ndng luong hat nhAn; c) Binh bdc hoi ma ngudn nhiQt ld hoi nu6c tu ndi khAc dua t6i; d) Ndi hdi ddt bing neng lugng mit trdi; e) N6i hdi ddt bins ndng lugng diQn; g) C6c ndi hoi dat tr6n tdu h6a, tdu th&y vir c6c phuong tien vqn t6i kh6c. 2 Tai liQu viQn d5n TCVN 6008 : 1995, Ndi hoi vA binh chiu 6p lr,rc - Mdi han - Y6u cdu kV thuat vd phuong phrip kidm tra. TCVN 6413 :1998 (lSO 5730 : 1992), Ndi hdi cd dinh dng lo dng lfia cdu tqo hdn (trrl ndi hoi ong nu6c). 3 Thugt ngil, dinh nghia vn kf hiQu Trong ti6u chudn ndy 6p dr;ng c6c thu6t ng[t, dinh nghia vd kf hiQu sau: (1) l MPa= 1MN/m2 TCVhI 7704:2007 : 3;1 Thuft ngfr vd tfrie't b! 3.1.1 Ndi hdi (Boiler) Thiet bi dirng dd sin xudit hdi trJ nudc bing ngudn nhi6t do s{ ddt ch6y nhi6n li6u h1u cd, do nhi,6t c6a c6c khi th6i. c6 thd gdm nhidu bo phAn, kh6c nhau vd trang th6i vdt lf cria nrr6c hay c6a hoi nu6c, nhung c6 li6n hO v6i nhau dd sin xudt hoi nu6c, d6 lir c6c b6 phdn chiu Ap lr,rc cfra ndi hoi: - Phdn sinh hoi; - Bd h6m nurdc; - B6 quii nhi6t; - B0 t6i qu6 nhi6t. Nhung ndi hoi don gi6n c6 thd chic6 pha'n sinh hoi. cdc b6 phdn chiu 6p lqrc trdn thu6c ph?m vi 6p dung crra ti6u chudn niy. 3.1.2 Phdn sinh hoi Cac bQ phdn c&a ntii hoi ma 6 dAy nu6c dudc boc hdi. Suchuydn tt6ng cfia h6n hgp hoi nu6c trong phdn sinh hoi c6 thd lA stt chuydn ddng tudn hoirn tu nhi6n hay c6 trg lr,rc hodc ld srr chuydn d6ng ctr6ng bfic. 3.1.3 Bg hAm nUdc (con goi ld b6 tidt ki6m nhi6n tieu) (Economizer) Mgt bd phAn c0a ndi hoi sfrdung nhiet c0a kh6i ndi hdi, dd gia nhi6t cho nrl6c cdp vdo ndi hoi, Bq hdm nr-f6c c6 thd lam vi6c 6 trang th6i soi (dd c6 sinh hoi), hoic chua s6i. BQ hdm nu6c goi ld ,,kh6ng ngdt duoc" khi n6 duoc ndi vdi ph6'n sinh hoi khdng qua van kh6a vd goi lA "ngdt dugc" khi c6 van kh6a tr6n duong noi ndy. 3.1.4 3G qu4 nhi€t (Superheatei') MQt b0 phAn ctia ndi hci dd qua nhi6t hoi b6o hoa. BQ qr:6 nhiet c6 ihd c6 nhidu cdp tuy theo y6u cdu sfr dung nhi€t d6 crla hoi, 3.1.5 89 tei qu6 nhi6t (Re - Superheater) iiviOt b0 phAn cfra n6i hoi d'd gia nhi6t hoi qud ;rhidt d'd qua su dung. cOllc ty co puirv t"t'"r rrN.r vA uunrq r-uv€w Kr{ ilt?flVft ; T ii LItrYJ KiEM SSAT 3.1.6 tiiQt b9 phin c(ra nd: hoi (A part of boiler) M5,i bO phQn cira ndi hoi c6 thd gdm nhidu phdn t0 chiu 6p lr,rc: dng g6p, bao hoi, bao nu6c, dng tidp nhiQt, dng d6n trong pham vi ndi troi' 3.1.7 Ndi hdi dng nu6c (Water - tube boiler) Ndi hdi trong d6 nudc vir hoi di irong dng con ngudn ddt n6ng 6 ngcli dng. 3.1.8 Ndi hdi dng 16 - dng lira (Fire - tube boilers) Ndi hditrong d6 nu6c vd hoi bao quanh b6n ngodri dng con ngudn ddt n6ng 6 bdn trong dng' dng Frm nhiQm vu budng ddt nhi6n tieu gqi tir 6ng lo; dng d6n kh6i dd ddt n6ng goi ldr dng l&a. Budng ctdt c6 tl'd c6 dang lir hOp lfra. 3.1.9 Ndi hditudn hoin tr,r nhi6n (Natural circulation boiler) Ndi hdi trong do su chuydn cfQng tudn hodn c0a nudc va h6n hgp hoi nu6c duoc tao non b6i sr/ chcnh lQch trgng ludng c6t nu6c gifra phdn di l6n vir phdn dixudng cfra vdng tudn hodn' 3.1.10 N6i hoi tudn hoin cr6ng brirc hoic c6 trg h,rc (Forced or assisted circulation boiler) Ndi hdi dng nu6c trong d6 sr,r chuydn il6ng tudn hoirn c0a nd6c vir h6n hqp hoi nu6c duqc th{c hiQn nhd tirc ct6ng hoin todn hoic mQi phdn c0a bom ddy' 3.1.11 Ndi hoitr{c ltru Ndi hdi dng nu6c mi srl chuydn ttong cfra ntJ6c vd hoi nu6c ld chuydn dQng mQt chidu, dugc t?o ra b6i gi6ng 6p giua ddu vAo n6i hoi tir nrroc cdp vir ddu ra ndi hoiia hoi. Gidng 6p t?o ra b6i bom' 3.2 Thuit ngfr vi 6p sudt, nhiQt d9, chidu ddy, c6ng sudt vi tudi ilrg thidt k6 3.2.1 Ap sudt lim viQc dinh mrlc (Norminalworking pressure) Ap sudt l6n nhdt mir ndi hdi clugc ph6p lAm vi6c lAu dAi: - Ddi v6i ndi hoi chi sAn xudt hoi bao hoa lir 6p sudt hoi ra kh6i ndi hoi; - Ddi v6i ndl hoi san xudt hoi qud nhiQt ld 6p sudt hoi ra kh6i bQ qu6 nhiQt' 7 ' TCVN 7704:ZOOT 3.2.2 Ap su61 thigt kc'(Design p;.essui.e) Ap suat ldm vi6c t6n nhdt cho ph6p: a) Tai bao hoi ddi v6i ndi hoi tu6'n hoirn tu nhi6n hoic c6 tro luc; b) Tqi ddu ra cuoi cirng cria bQ qu6 nhi6t ddi vdi ndi hdi truc tw (tru khi 6 ddy c6 dqt van kh6a trung gian); c) Tai ddu ra b6 t6i qu6 nhi6t, bo qu6 nhiQt drrgc ddt dQc lep, bQ h6m nu6c'ngdt dude'. 3.2.3 Ap suit tinh to6n (Calculation pressure) Ap sudt thiet kd c6 tinh ddn: - Ap sudt thriy tTrnh vd r?ng v6i chd dQ ram vi6c khic nghirot nhdt; - Ap suat m6 c0a van an tohn d5t 6 gia tri cao nhdt tr6n b6 qu6 nhi6t hoic tr6n dudng ra c0a bQ t6i qua nhiQt dd bi cho su giim 6rp suat tudng rrng v6i didu kiQn tdm vi6c khdc nghiQt nhdt, 3.2.4 Nhiet d0 thi61 kd (Design iemperature) Nhiet do thdrnh kim loai lir cin cr? dd tqa chon do bdn thiet kd vd x6c dinh c6c kfch thr^r6c c1a c6c b6 phan ndi hoi (xem Phu tuc A ). 3.2.5 Chidu dny dinh mt?c crja vqt ligu Chidu diry danh dinh c0a v6t ti6u. 3.2.6 Chiiu diy thr,rc (Actual thickness) Chidu ddy dinh mrlc c6 tru (hoic cQng) dung sai chd tao, 3.2.7 fudi ttrg thie't kC'(design lifetime) Tudi tno duoc bidu thi bing so gio v6n hanh cho ph6p doi v6i c6c b6 phan chiu 6p h.rc cfia ndi hoi trong didu kiQn tdm vi6c c[ra ndi hoi. 3.2.8 COng sudt cria ndi hoi (Boiler rate) sAn luong hoi sinh ra trong mot don vi thdi gian, dugc tlo bing kg/h, tdn/h, kg/s hoic tinh theo don vi ndng iUong (Wati, kW, MW), tuong trng voith6ng s6 hoi cria ndi hoi. 8 rlor,rcrl,cde"ffi iIUAN iUVet"l KTI\T LaO g0l'tC 1i'Ai l.{il,r-r Kxtriu sfiAT ^ a' -""'rcvN 3.3 Thuft ng0 vd ngudi thie't k6', chdt4o, mua ??,1 Ngudi thidt kd (Designer) Ngudi c6 tu c6ch ph6p nh6n (cA nh6n hay td chr?c) vd c6 nghi6p vu chuydn m6n trong linh vuc thidt kd chd tao ndi nol. 3.3.2 llarr}i ^h{ t-^ /f, lanr rfaalr rrar\ rt!rsvr vr19 aqv \rYrgrrurqvrvrvr lr Nguoi c6 trr cSch ph6p nhAn (c6 nhAn hay td chrSc) c6 trinh dQ chuydn mon vA c6 c6c thidt bi chuyEn dr)ng trong vi6c chd tao ndi hoi. 3.3.3 Ngudi b6n ndi hoi (Boiler saler) Ngudi c6 trrc6ch phiip nhdn (cd nhAn hay td chr3c) thr,rc hi6n vi6c b6rn ndi hoitr6n thitrudng. 3.3"4 Ngudi cung c{p vit ligu (Material supplier) Ngudi c6 tu c6ch ph6p nhdn thqrc hiQn vi6c budn bdn c6c v?t lieu ding dd chd tao, ldp ddt, sfia chira ndi hdi. 3.3.5 Ngudi l5p dit, sr?a chira ndi troi Ngudi c6 tu cach ph6p nhdn, c6 trinh cI6 chuyOn mdn vd c6 c6c thidt bi chuy6n dirng phr,rc vu cho viQc ldp dit vdr sfta ch0a n6i hoi. 3.3.6 Ngudicnfi s8 trtru Nguoi ddu tu xdy dtrng cong trinh hdi hdi. 3.3.7 Nguoi sfi ar,rng ndi hoi (Boiler user) Nguoi c6 tr6ch nhiQm tnrc tidp hay gi6n tidp trong viQc sit dung ndi hci. 3.4 C6c ki higu vir don vi - 6p sudt t5c dung, MPa; - ung sudt cho phep c(ta kir,r io+i, lvlPa; p Ocp 9 TCVN 7V04:2007 o, 20, o"20 - gidi han bdn keo va gi6i han ch6y 6 nhiQt dQ thi nghidm trong phdng, Mpa: D,, Dn - duong kfnh trong, ngoiri c0a th6n hinh trg, mm; d, d.u*, d,in - dudng kinh 15 khoet (hinh trdn), dudng kinh l6n, dudng kinh b6 cfia 16 hinh elfp, mm; S - chidu dAy, mm; 9n, gr - hQ so ldm ydu do hdn, do khoan 16; ta, tnn, t"6 - budc doc, ngang, ch6o c6c d6y 15 khoan; 1,,, t," - nhiQt d6 tinh to6n, nhi6t cl6 m6i chdt, 0C; c - hQ sd hi6u chinh vd ehidu day tdm th6p do sai so chd tao id;m. 4 Kim logi ch€'tgo, l5p dit, sfra chira ndi hoi 4.', YOu cdu chung 4.1'1 Kim loai dirng dd ch6 tao, s&a chita c6c b6 phqn chiu ap l{c cfra ndi hoi, kd cA que hAn, ddy hdn phSi c6 tfnh d6o, d0 do bdn theo y6u cdu cfla thidt kd, c6 tfnh han tdt, b6o d6m lirm vi6c bdn vfirrg 6 nhirng didu ki6n v6n hhnh quy dinh. 4.1.2 Thdp dirng cho ndi hoi phai la th6p c6 ch6't luong cao, gdm c6c loai th6p tdm, th6p c6n, th6p r6n c6 thirnh phdn h6a hoc c6c nguy6n td chinh trong gi6i han nhu sau: a) Cacbon kh6ng l6n hon 0,23 % Khi c6 su th6a thudn v6i ngudi sfi dung ndi froi c6 thd ding th6p c6 thdnh phdn cacbon ddn 0,25 o/o nhrnrg phAi ch0 y khi thi6t kd c6ng ngh6 hdn; b) Phdtpho kh6ng l6n hon 0,04 o/o c) LUU huynh khdng l6n hon O,A4 Vo d) Caebon + mangan/6 kh6ng l6n hon O,45 o/o Thirnh phdn h6a hoc c6c nguy6n td, tfnh chdt c0a c6c loai th6p dirng dd chd tao c6c bQ phQn chiu ap lEc cfra ndi hoi duoc tham khir: troig c6c ti6u chudn chdt lrrong th6p vi6n d6n (xem phr,r luc B). 4.1.3 Trong moi trudng hdp, kim l':ai dung dd s&a chfa in6t bd ph6n chiu 5p ir.rc niro d6 c6a ndi noi pfr6i c6 c6c ddc tii'h vir tinh b6n tuong iluong dic tfnh vir tinh bdn crla kim loai dirng dd chd tqo ra b6 phrin do. 4.1.4 Chdt lrr'sng vir ch0ng loai v3i liQu dung khi che tao. sfta chfra phii theo d6ng y6u cdu crla thi6t ke, Khi ci nghi vdn vd chdt lugng hc6c chung loai vQt liQu thi phAi dem ph6n tich kidm nghiQnr lai vd xAc clinh c5c dtc iillh c6ng nghd trudc kni si? ciung. Chf irg lcai, rlrl* d&c tilih v'it fidil ,i:.i ti6u chirlin cfia ncli s6n xudt vat liQu phSi dugc ghi 16 vao rong ly lich ndi ici, 'l t'r VA G ^. ^? AN I{IEM DII,{H KTAT LAO DON KiEt\,{ s,eAr C TY C() PI{ hl{ LUYEN \A 'AI X.iriu cn. 4rL ., cnnr i{i,r I a 4.2 Quy dlnh vi vit liQu dtng trong chd 4.2.1 Gi6i han bdn k6o tinh to6n nh6 nhdt c0a th6p 6 nhiQt dQ ldm viQc c0a thdnh kh6ng drroc t6n hon 450 MPa, nhiQt dQ tinh todn cfra thdnh kh6ng dugc ldy thdp hon 250 0C. 4.2.2 Th6p d0c chi duoc sfi dung lAm c6c van vi phr; tirng. 4.2.3 Kh6ng dCrng gang dd chd tao cdc bQ phqn chiu ap lr,rc c0a ndi noi, trrr bQ hdm nudc bing gang n6u trong 5.10,1 4.2.4 Cho ph6p dilng gang dd chd tao van, nhung 5p sudt lirm vi6c cfra m6i chdt qua van ph6i kh6ng quA 2,2 MPa vd ntritit 00 khong qu6 250 0C. NhA chd tao van phAi ghi 16 6p sudl ldm vigc cho ph6p tr6n thAnh van. 4.2.5 Kh6ng s& dung hgp kim ddng kh6ng chrla sdt dd chd tgo c6c bQ phdn chiu 6p luc, trr:r cdc van vd phr,r tirng drrdng dng c6 5p sudt m6i chdt du6i 1,6 MPa vd nhiQt d6 m6i ch6't kh6ng qu6 250 0C. 5 YGu c6'u vi fdt ci'u ndi hoi 5.1 Ydu cdu chung 5.1.1 Kdt cdu ndi noi phAi d6m b6o an todn khi v6n hdnh, dim bAo ddt n6ng ddng ddu vd gidn n6 tr.r do c&a c6c chitidt, b6 phqn, c0ng nhu ph6i th6a m5n c6c y6u cdu v6 kidm tra, xem x6t, ldm sach, sr}a chffa hodc thay thd c6c bQ phan cfra ndi hoi. 5.1.2 Vi6c dua nudc cdp vAo trong bao hoi hay thdn ndi froi phii tr6nh lirm ch6nh lech nhiet d9 dQt 'ngot. 5.1.3 C6c chi tidt bdn trong c6c bQ phQn ndi hoi kh6ng c6 didu kiQn kidm tra, xem x6t, s&a ch[a, ldrm sqch tai cn6 tni cdn chd tao theo kidu thSo ra duoc. 5.1.4 Tdt c6 c5c thidt bi di6n v?r hQ thdng ndi ddt trong pham vi ndi hoi phii thr,rc hi6n theo dring ydu cdu vd an todn diQn hiQn hdnh. 5.1.5 Ddi v6i ndi noi odt nfricn lirau rdn c6 cdng sudt tren 4Vh phii cd khi h6a vi6c cdp nhi6n ti6u vir thAi tro xi. 5.1.6 Ddi vdi ndi froi ddt nhien li€u l6ng hodc khi cdn ituoc t{ dQng h6a vi6c cung c6'p nhi6n liQu va khdng chd ap sudt, tr,l dQng c5t nhi6n li€u khi can nu6c c0ng nhu khi ting qu5 tri sd 6p sudt quy dinh. 5.2 Thin hinh trg bao hoi, bao nu6c, ong g6p, ndi hoi 5.2.1 ThAn hinh tru c0a bao hoi, bao nu6c, dng g6p, ndi noi c6 thd dugc gh6p n8i nfridu tdm kim loai kh6c nhau nhr-nrg cdn trAnh tgo n6n c6c mdi ghep hlnh ch0thqp. 1t [...]... ph&ng ph6i l6n hon hodc bing chidu phdn hinh tru 6.5 Tinh dq bdn c6c bQ phin chlu 6p lrfc cfra ndi hoi ong ld dng lfra nhu hgp lrra, dng ld, budng qugt, thanh gilng Theo c6c quy dinh trong TCVN 6413 : 1998 TCVN 7704:2 007 6.6 Tinh d6 bdn cria dng 6.6.1 dng ding cho ndi hoi ld dng c{ia c6c bd mdt trao ddi nhi6t nhrr ddn dng sinh hoi, bQ qu6 nhi6t, b6 hdm nudc, dng d5n hoi, nrr6c 6.6.2 Tinh dQ bdn c0a dng... kidu dng nrJ6c nim nghi6ng hay dlmg tudn hoirn t';nhl6n: milc nu6cthdp nhdt do nguoi thiet ke quy dinh dr,ra theo tinh to6n cfAm bAo tudn hodn dn dinh c0a ddng m6i chdt trong hQ thong tudn hoirn 17 TCVN 7704:2 007 5.8.1.5 Ddi vdi nhfrng loqi ndi hoi chua dugc quy dinh trong 5.8.1.1 ddn 5.8.1.4 thi mr?c nu6c th6p nhdt do nhd thiet kd quy dinh, nhung phAi dAm bio sao cho c6c thirnh cfra ndi hoi kh6ng bi... Ting c:3ng cho 16 kfro6t blng c6ch ting chidu diy ph$n diy c6 kho6t 16 5.3.4 D6y cdu Circ y6u cdu vd khoet 16 tr6n d6y cdu, vd kich thu6c phdn hinh trr; chuydn tidp tudng t{ nhu ddi vdi d6y elip 15 TCVN. 7704:2 007 5'3'5 c5c loqi day dang kh6c nhu.day hQp, day cong kh6ng c6 dang elfp kh6ng sfr dung cho c6c tnrdng hop m6i chd tao Ddi v6i c6c trudng hgp d6 duoc chd tao tu tru6c, khi cdn tinh kidm tra ph6i... thang phAi c6 khoAng trdng cao it nhdt 2 m 8.4.5 Kho3ng c6ch theo chidu thEng dttng tu sAn thao t6c ddn mfc trung binh cfra thidt bi do m0c nu6c khdng dr-roc nh6 hon 1 m vir kh6ng l6n hon 1,5 m 35 TCVN 7704:2 007 S.5 He thong ci'p nhi6n tigu - thAi tro xi 8.5.i i.ldi hoi c5 c6ng sudt trr 4 tdnlh tr6 i6n sfr dr,rng nhi6n li6u rdn (tru c0i) ph6i co gi6i h6a vi6c cdp nhi6n li6u vi thii tro xi Khi luong tro... tqi c6c 16 kho6t 6 Hinh 8 TCVN 6413 : 1998 5.2.7 Khi thAn hinh tru clta bao hoi, bao nrl6c, dng g6p dit nim ngang c6 chidu dAi tr6n I m cdn c6 biQn phdp chong uon v6ng 5.2.8 dnE g6p c6 cdlu tao lir ong hinh lru tron Khong cho ph6p chd tao dng g6p kh6ng phAi hinh trU tron 5.2.9 C5c quy dinh vd thAn hinh tru cho dng ld vd thAn ndi hoi dng lo dng l0a tudn th0 c6c quy dinh trong TCVN 6413 : 1998 5.3 D6y... phrrong ti6n do kidm sau: - Van an toirn: - Ap kd; - Nhict kd 5.10.1 4 c6 thd dat th6m dr/dng t6i tudn hoan c0a b0 ham nu6c dd dua nu6c trd tai ttdu hrjt cfra bom nu6c cdp md kh6ng dua vdo ndi hoi 18 7704:2 007 5.10.2 89 h6m nu6c blng th6p 5,10.2.1 BQ ham nu6c blng thep gdnn c4c dng th6p kh6ng hirn Kh6ng cho ph6p dirng dng th6p hdn mi, hin xodn dd chd tqo dng c0a b9 hdm nu6c 5.10.2.2 Nu6c ra kh6i bO hdm... 5.13.1 C5c phuong tiQn do kidm Uit Uugc ddivdi ndi hoi - Phuong ti6n do 6p suat (ep kd); Phuong ti6n ilo mrlrc nu6c (ong th&y, ddng hd do mfc nrl6c ); Phuong tiQn khdng chd 5p sudt (van an toirn); 19 TCVN 7704:2 A07 - Phudng tiQn do nhiQt dQ (nhiQt kd) dirng cho ndi hoi c6 hdm nrtdc bing sin xudt hoi qud nhi6.t va khi c6 sfrdr,rng b6 gang 5.13.2 Ap ke 5.13.2.1 M6i ndi hoi phAi c6 it nhdt mQt ap kd thong... blng cfi6n, blng hci nudc hay co khi; b) bom injecto; c) C6c phuong ti6,n c6 6p sudt cao hdn 6p sudt ndi hoi c6 d0 kh6 ning ddy nudc vdo ndi hoi khi ndi hoi ldm vi6c 6 ep sudt l6n nhdt cho ph6p 23 TCVN 7704 1 2007 ,',:' 5.14.2 M5i ndi hoi ph6i dLtdc trang bi ft nhdt hai thi6t bi cdp nu6c; mot lirm vi6c vir m6t drl phdng, trir c6c ndi hoi sau: a) Ddt b) C6 s6n lrrong nh6 hon 150 kg/h, bing nhi6n bing liQu... dinh tuviec tfnh dg odn d6y phlng (xem 6.i) 5.3.2.5 Khdng sfi dqrng day phSng dd ndi v6i thAn hinh tru c6 clrrdng k(nh trong l6n hon 325 mm, tru khi d0ng day phlng lAm mit sirng dng (xem 5.4) 13 ,TCVN7 7O41 .2007 i:,.'., ,i ,r,, ','',, I 5.3.3 Day elip , 5.3.3.1 D6y elfp gdm hai ph6'n cdu tqo: phin etfp vd phdn hinh trqr (Frinh 3) 5.3,3.2 Trong moi trudng hgp, tg t6 chidu cao tr6n dudng kinh ddy (kich... hQp l0a, mflt sdng cdn tinh ifdn b6n kinh cong chuydn tidp, ciic phdong ph6p ting cfirrg, eAc rndi cria bd mit gia cong hin ndi, e6c 16 khoan vir y6u cdu chdt lugng 6 c0ng nhrl chdt luong c6c tdm 31 TCVN 7704:2 097 7.2.5 6ng g6p vd c6c Cdn kidm tra bd bQ ph6n chiu 6p tuc trJong t!/ mit ngodi vtr o'dc biQt b6n trong dng g6p Trudng hgp cdn thidt ph6i dr)ng c6c phuong phap kidm tra khOng ph6 h0y od t . ,.75 TGVN 7704: 2007 ) Ldi n5i ddu TcvN 7704: 2007 thav rhdcho TcvN 6004: 1995; TCVN 6005: 1995; TCVN 6006: 1995; TCVN 6007: 1995. TCVN 7704 :2007 do Ban k! thu6t ti6u chudn TCVNT. TCVN TrEU cHuAr.r euoc'c TCVN 7704 :2007 Xudt bin ldn 1 IA i c6l-c,rvcO-mraffi HUAN rurfn KTAT rAo o6nc rfurguKrtMsofr $0:. cdu, vd kich thu6c phdn hinh trr; chuydn tidp tudng t{ nhu ddi vdi d6y elip. t' 15 TCVN. 7704: 2007 5'3'5 c5c loqi day dang kh6c nhu.day hQp, day cong kh6ng c6 dang