Cov Kav Hlau Uas Tiv Thaiv Kev Kub Ntxhov (CRA) Clad Steel Pipes rau Kev Pabcuam Qab Zib thiab Cov Ntawv Thov Offshore
Hauv lub ntiaj teb kev thauj mus los roj thiab roj av uas nyuaj heev, kev xeb yog tus yeeb ncuab tseem ceeb ntawm kev ncaj ncees ntawm cov khoom muaj nqis thiab kev ua haujlwm ntev. Cov kav dej thauj cov xov xwm uas muaj kev kub ntxhovhydrogen sulfide (H₂S),Cov pa roj carbon dioxide (CO₂),cov tshuaj chloride, thiab cov organic acids ntsib kev pheej hmoo loj heev. Txhawm rau tawm tsam qhov no, kev lag luam tau tig mus rau cov khoom siv siab heev xws liAPI 5LD clad yeeb nkabthiabAPI 5LD kab yeeb nkabCov noCov kav dej uas tiv taus corrosion (CRA)muab qhov kev sib koom ua ke zoo meej: lub zog ntawm cov hlau carbon nrog rau qhov teeb meem corrosion ntawm cov hlau alloys qib siab.
Womic Steel, siv nws txoj kev sib koom ua ke "Plate-to-Pipe" nrog nws lub tuam txhab niam txiv,WomicSteel Group, sawv ntawm pem hauv ntej ntawm cov thev naus laus zis no. Nrog kev nkag mus rau qib siabcov phaj sib txuas ua ke nrog cov hlau nplaumtsim los ntawmWomicHlau thiab lub chaw tsim cov yeeb nkab zoo tshaj plaws tsuas yog 5km deb, Womic Steel muab cov khoom zoo tshaj plawsCov kav dej sib xyaw ua ke bimetallicrau cov haujlwm hauv hiav txwv, ntug dej hiav txwv, thiab hauv qab dej hiav txwv thoob ntiaj teb. Phau ntawv qhia no tshawb nrhiav txog cov txheej txheem kev ua haujlwm ntawm API 5LD cov kav dej tiv taus xeb, tsom mus rau cov txheej txheem tsim khoom, kev xaiv cov khoom siv, thiab cov qauv kev tsim kho.
API 5LD Clad Pipe thiab Lined Pipe yog dab tsi?
API Spec 5LDyog tus qauv thoob ntiaj teb uas tswj hwmCRA clad los yog lined steel yeeb nkabrau cov txheej txheem thauj mus los hauv cov roj av thiab cov roj av. IbAPI 5LD clad steel yeeb nkabyog ib yam khoom sib xyaw ua ke uas muaj ob txheej sib txawv:
1. Cov Yeeb Nkab Hlau Carbon Backing:Muab lub zog kho tshuab kom tiv taus lub siab sab hauv, cov khoom thauj sab nraud, thiab kev khoov. Nws feem ntau yog tsim los rauAPI 5Llos yogISO 3183cov lus qhia tshwj xeeb (qib zoo li X52, X60, X65).
2. Txheej Txheem Tiv Thaiv Kev Kub Ntxhov (CRA):Ua haujlwm ua ib qho thaiv ruaj khov tiv thaiv cov kua dej corrosive. Cov txheej no tuaj yeem yog cov hlau tsis xeb (piv txwv li,316L), hlau tsis xeb ob lub (piv txwv li,2205), lossis cov hlau ua los ntawm nickel (piv txwv li,625,825).
Cov qauv sib xyaw ua ke no ua kom cov nqi siv tau ntev dua los ntawm kev siv cov khoom kim heevCov ntaub ntawv CRAtsuas yog qhov twg xav tau - ntawm sab hauv - thaum lub peev xwm thauj khoom los ntawm cov hlau carbon pheej yig dua.
Cov Txheej Txheem Thoob Ntiaj Teb Tseem Ceeb rau Cov Kav Dej Uas Tiv Thaiv Kev Xeb
Kev tsim khoom thiab kev sivAPI 5LD clad yeeb nkabyuav tsum ua raws li cov qauv sib txuas ua ke kom ntseeg tau tias muaj kev nyab xeeb thiab kev ntseeg tau:
●Tus Qauv Khoom: API Spec 5LD(Cov Yeeb Nkab Uas Muaj Hlau Thiab Hlau Ua Ib Daim), API Spec 5LC (Cov Yeeb Nkab Khoom CRA).
●Cov Yeeb Nkab Hauv Paus: API 5L / ISO 3183(Kab Yeeb Nkab),DNV-ST-F101(Cov Txheej Txheem Dej Hauv Qab Hiav Txwv).
●Cov Khoom Siv:ASTM A240/A312 (Cov Hlau Tsis Muaj Hlau), ASTM A790 (Duplex), ASTM B424/B444 (Cov Hlau Nickel), NACE MR0175/ISO 15156 (Kev Pabcuam Qaub).
●Tsim & Tsim Khoom:ASME B31.4 (Cov Kav Dej Ua Kua), ASME B31.8 (Cov Kav Dej Roj), DNV-ST-F101, NORSOK M-601 (Kev Vuam).
●Txheej:ISO 21809 series (Txheej Sab Nraud).
●Kev Zoo & Cov Ntaub Ntawv:EN 10204 (Cov ntaub ntawv tshuaj xyuas), EN ISO 9712 (NDT Cov Neeg Ua Haujlwm).
Cov Txuj Ci Tsim Khoom: Mechanical, Weld Overlay & Metallurgical Clad
Kev ua tau zoo ntawm ibbimetallic composite yeeb nkabraug cuam tshuam los ntawm nws txoj kev tsim khoom. Muaj peb lub thev naus laus zis tseem ceeb uas siv thoob ntiaj teb, txhua tus muaj cov yam ntxwv sib txawv hauv kev sib txuas, kev ua haujlwm zoo, thiab tus nqi.
1. Cov Yeeb Nkab Uas Muaj Txheej Txheem Tshuab (MLP)
Cov yeeb nkab uas muaj txheej txheem mechanicallyyog tsim los ntawm kev ntxig ib phab ntsa nyiasCRA linerrau hauv cov yeeb nkab carbon steel thiab tom qab ntawd siv hydraulic lossis mechanical expansion los tsim kom muaj kev cuam tshuam.
●Txheej Txheem:Ib lub yeeb nkab CRA (piv txwv li,316L) yog muab tso rau hauv ib qhoAPI 5LCov yeeb nkab hlau carbon. Muaj kev siab siab sab hauv, ua rau lub liner nthuav dav thiab nias nws nruj nreem rau ntawm phab ntsa sab hauv ntawm cov yeeb nkab.
●Xaus Sealing:Cov yeeb nkab kawg xav tau kev kho mob tshwj xeeb, xws li vuam lub nplhaib CRA lossis tsim lub xauv tshuab, kom tiv thaiv cov liner rub rov qab thiab muab cov khoom thaiv xeb ntawm qhov girth weld.
●Cov yam ntxwv:
1. Qhov Zoo:Kev ua haujlwm tau zoo thiab tus nqi pib qis dua rau qee qhov ntau thiab tsawg.
2. Qhov Tsis Zoo:Lub zog sib txuas qis dua piv rau cov txheej txheem hlau. Kev ruaj khov ntawm cov liner nyob rau hauv lub siab sab nraud lossis khoov (piv txwv li, kev teeb tsa reel-lay) yog qhov teeb meem tseem ceeb uas xav tau kev txheeb xyuas ib qhoDNV-RP-F104Cov txheej txheem kaw kawg tuaj yeem cuam tshuam rau qhov sib npaug ntawm cov yeeb nkab bevel, uas muaj peev xwm cuam tshuam rau kev ua haujlwm vuam thiab qhov zoo ntawm thaj chaw vuam. Kev ua tau zoo ntawm tag nrho cov yeeb nkab qis dua li cov yeeb nkab uas tau sib txuas ua ke.
2. Weld Overlay Clad Pipe
●Cov yeeb nkab vuam overlay cladyog tsim los ntawm kev tso nyiaj rau ib qhoCRAtxheej ncaj qha rau ntawm qhov chaw sab hauv ntawm cov yeeb nkab carbon siv cov txheej txheem vuam siab heev.
●Txheej Txheem: Kub Hlau TIG (Tungsten Inert Gas)kev vuam, GMAW, lossis SAW yog siv los thov ib qhocov hlau uas tiv taus xebxws li2205,316L, los yog625rau ntawm phab ntsa sab hauv ntawm cov yeeb nkab carbon uas tsis muaj qhov txuas lossis vuam. Feem ntau yuav tsum tau hla ntau zaus kom ua tiav qhov tuab uas xav tau.
●Cov yam ntxwv:
1. Qhov Zoo:Muab kev sib txuas ua ke ntawm cov hlau nplaum thiab cov substrateCRAtxheej. Zoo heev rau cov kav dej me me, cov khoom siv (lub luj tshib, tees), thiab cov qauv nyuaj uas lwm txoj kev tsis yooj yim siv.
2. Qhov Tsis Zoo:Kev ua haujlwm tau zoo tsis zoo, thiab lub voj voog tsim khoom ntev dua. Cov txheej txheem no siv zog ntau thiab muaj tus nqi tsim khoom ntau dua vim yog siv cov khoom siv vuam ntau. Qhov saum npoo ntawm cov khoom siv vuam feem ntau ntxhib dua li cov phaj dov thiab tej zaum yuav xav tau kev ua tiav.
Womic Steelsiv cov advancedHlau Kub TIGthev naus laus zis rau kev siv weld overlay, tsim cov kav dej thiab cov khoom siv feem ntau nyob rau hauv qhov loj me ntawm Φ430 mm txog Φ1422 mm, nrogCRAcov ntaub ntawv suav nrog2205,304,316,625, thiab825.
3. Cov Yeeb Nkab Hlau Uas Muaj Hlau Sib Txuas (Qhov Zoo ntawm Womic Steel)
Cov yeeb nkab hlau sib txuas ua keyog suav hais tias yog daim ntawv qib siab tshaj plaws thiab txhim khu kev qha ntawmbimetallic composite yeeb nkabQhov no yog lub peev xwm tseem ceeb ntawmWomic Steel, ua haujlwm los ntawm nws txoj kev sib koom ua ke ze
●Txheej Txheem:
1. Kev Tsim Khoom Phaj Clad: Wetsim cov khoom zoocov phaj cladlos ntawm kev kub dov txheej txheem. ACRAphaj (piv txwv li,625,316L,2205) thiab ib daim hlau carbon tau sib txuas ua ke nyob rau hauv qhov kub thiab txias siab thiab siab, tsim kom muaj kev sib txuas hlau mus tas li ntawm qib atomic.
2. Kev Tsim Yeeb Nkab:Cov phaj clad zoo no ces raug xa mus rauWomic Steelthiab tsim ua cov kav dej siv cov thev naus laus zis siab heevJCOEthev naus laus zis.
3. Kev vuam:Cov kab sib txuas ntev yog welded siv kev sib xyaw ua ke ntawm SAW rau cov hlau carbon backing thiabHlau Kub TIGrau qhovCRAtxheej, xyuas kom meej tias qhov kev thaiv xeb tsis tu ncua.
Cov yam ntxwv:
1. Lub zog sib txuas siab tshaj plaws:Cov hlau sib txuas ua ke muab qhov kev tiv thaiv zoo tshaj plaws rau kev tawg hauv qab qhov siab heev, kub, thiab kev ntxhov siab ntawm lub tshuab.
2. Cov Yeeb Nkab Zoo Tshaj Plaws:LubJCOEcov txheej txheem, pib los ntawm lub phaj tiaj tus, ua rau muaj qhov tseeb zoo heev, puag ncig, thiab sib npaug ntawm bevel. Qhov no ua rau kev vuam zoo dua thiab kev teeb tsa zoo dua.
3. Kev Ua Haujlwm Zoo & Kev Siv Nyiaj Tau Zoo:Rau cov kav dej loj, txoj kev no muaj kev ua haujlwm siab, lub sijhawm xa khoom luv dua, thiab tus nqi sib tw tag nrho piv rau cov khoom CRA lossis txawm tias qee qhov kev daws teeb meem weld overlay rau cov ntim loj.
4. Qhov Chaw Zoo Kawg Nkaus:Sab hauvCRAqhov chaw du, txhawb kev ntws zoo dua thiab txo qhov kev pheej hmoo ntawm cov khoom tso tawm.
Womic Steeltshwj xeeb hauv kev sib txuas cov kav dej hlau, siv qhov kev sib koom ua ke "Plate-to-Pipe". Qhov no ua kom ntseeg tau tias muaj kev taug qab cov khoom siv tag nrho, nkag mus rau cov phaj zoo, thiab kev koom tes ua haujlwm tsis muaj teeb meem ntawm lub tshuab zeb phaj thiab lub tshuab zeb yeeb nkab. Kev koom ua ke no yog qhov sib txawv tseem ceeb, uas tso cai rau kev txhim kho sai thiab kev xa cov kev daws teeb meem rau cov haujlwm uas xav tau.
Cov Txheej Txheem Tsim Khoom ntawm API 5LD Clad Steel Pipe
Cov txheej txheem tsim khoom ntawm API 5LD clad yeeb nkab yuav tsum tau tswj hwm nruj kom ntseeg tau tias muaj kev sib txuas ruaj khov, tiv taus corrosion, thiab kev ua haujlwm kho tshuab.
Txoj kev tsim khoom ib txwm muaj rau cov yeeb nkab uas tau sib txuas ua ke nrog cov hlau muaj xws li:
1. CRA clad phaj ntau lawm siv tawg bonding los yog kub yob bonding
2. Kev tsim phaj siv UOE lossis JCOE yeeb nkab tsim thev naus laus zis
3. Kev vuam arc hauv qab ntawm cov seams ntev
4. Kev kho cua sov thiab kev kho dua tshiab ntawm cov yeeb nkab
5. Kev kuaj tsis ua puas tsuaj suav nrog kev tshuaj xyuas ultrasonic thiab radiographic
6. Kev sim txiav cov ntawv cog lus thiab kev sim ua kom tiaj tus
7. Kev sim siab hydrostatic
8. Kev tshuaj xyuas qhov ntev thiab kev txheeb xyuas zaum kawg
Rau kev tsim cov yeeb nkab uas siv tshuab ua, cov txheej txheem ib txwm muaj xws li:
1. Tsim cov yeeb nkab API 5L carbon steel backing
2. Muab ib daim CRA nyias nyias ntxig rau hauv cov yeeb nkab
3. Kev nthuav dav ntawm lub tshuab lossis kev nthuav dav hydraulic los tsim kev cuam tshuam haum
4. CRA kawg xauv lossis CRA nplhaib installation
5. Kev kuaj xyuas kev ruaj khov ntawm cov ntaub thiab kev tshuaj xyuas qhov ntxhib
6. Kev kuaj hydrostatic thiab kev tshuaj xyuas geometry
Cov txheej txheem no ua kom ntseeg tau tiasAPI 5LD clad steel yeeb nkab thiab API 5LD lined yeeb nkabua tau raws li cov lus qhia nruj ntawm cov kav dej roj thiab roj av.
Kev Xaiv Khoom Siv thiab Cov Xwm Txheej Siv
Xaiv qhov yogCRAcov khoom siv yog qhov tseem ceeb rau kev ua haujlwm mus sij hawm ntev. Lub rooj hauv qab no muab cov lus qhia ceev ceev raws li cov xwm txheej kev pabcuam rauAPI 5LD cov kav dej.
| Qhov Xwm Txheej Kev Pabcuam | Cov Khoom Siv CRA Pom Zoo | Cov Qauv Siv Tau | Qhov Loj Ib Txwm Muaj (DN) |
| Kev Sib Sau Cov Pa Roj Qab Zib Hauv Hiav Txwv (H₂S/CO₂) | 316L,317LHlau tsis xeb | API 5LD + API 5L PSL2, NACE MR0175 | 100 – 600 |
| Kev Txhaj Tshuaj Dej Hiav Txwv & Cov Dej Tsim Tawm | 2205Ob chav,2507Super Duplex | API 5LD, NORSOK M-650, DNV-ST-F101 | 150 – 600 |
| Cov Kav Dej Hauv Qab Dej tob (Siab Siab) | Cov hlau 625,Cov hlau 825(Clad) | API 5LD, DNV-ST-F101, DNV-RP-F104 | 200 – 500 |
| Multiphase nrog Organic Acids & High Chlorides | 904L,6Mo(S31254),Cov hlau 825 | API 5LD, NACE MR0175 | 100 – 400 |
| Cov Pa Roj Qab Zib Kub Thiab Cov Dej Nqus | Cov hlau 625(Luam los yog Clad) | API 5LD, NACE MR0175 | 50 – 300 |
*Ceeb Toom: Rau qhov chaw muaj kev kub ntxhov heev lossis qhov twg lub sijhawm ua haujlwm siab tshaj plaws yog qhov tseem ceeb,cov kav dej CRA khov khoib qhoAPI 5LC(piv txwv li,Cov hlau 625,C-276) tej zaum yuav teev tseg.*
Kev Tswj Xyuas Zoo, Kev Tshuaj Xyuas, thiab Kev Sau Ntawv
Qhov kev ncaj ncees ntawmAPI 5LD cov kav dej uas tiv taus xebtau ua kom ntseeg tau los ntawm Kev Npaj Tshuaj Xyuas thiab Kev Ntsuas (ITP). Cov haujlwm tseem ceeb suav nrog:
●Kev Txheeb Xyuas Cov Khoom Siv Raw:Kev tshuaj xyuas tshuaj lom neeg thiab kev sim khoom siv ntawm ob qho tib si hlau thiabCRAtxheej raws li ASTM thiab API cov qauv. Kev ua raws li kev pabcuam Sour suav nrog kev sim qhov nyuaj thiab kev sim SSC / HIC raws li NACE TM0177 / TM0284.
●Ua Haujlwm & NDT:
1. Kev Ncaj Ncees ntawm Daim Ntawv Cog Lus:Rau cov kav dej clad, 100% kev kuaj ultrasonic ntawm qhov sib txuas ntawm daim ntawv cog lus, ntxiv los ntawm kev txiav txim siab puas tsuaj, kev ua kom tiaj tus, thiab kev sim rov qab tiaj tus ntawm cov qauv.
2. Kev Tshuaj Xyuas Weld:100% kev tshuaj xyuas ultrasonic thiab radiographic ntawm qhov txuas ntev.
3. Kev Tshawb Xyuas Qhov Loj:Kev txheeb xyuas OD, WT, ovality, thiab ncaj nraim ib qhoAPI 5L.
●Kev Xeem Kawg:
1. Kev Ntsuas Hydrostatic:Txhua lub yeeb nkab raug kuaj xyuas kom paub tseeb tias nws muaj zog thiab ruaj khov.
2. PMI (Kev Txheeb Xyuas Cov Khoom Zoo):Kev txheeb xyuas qhovCRAtxheej tshuaj lom neeg rau ntawm cov kav dej tiav lawm.
3. Kev Tshuaj Xyuas Txheej Sab Nraud:DFT (Dry Film Thickness), adhesion, thiab so kom paub txog ib zaugISO 21809.
● Cov ntaub ntawv pov thawj:Tag nrho cov txiaj ntsig ntawm kev xeem raug muab tso ua ke rau hauv cov phau ntawv qhia txog cov ntaub ntawv, feem ntau yog tau ntawv pov thawj rauEN 10204 Hom 3.1 lossis 3.2, xyuas kom meej tias muaj kev taug qab tag nrho los ntawm lub khw yaj mus rau qhov yeeb nkab kawg.
Cov txiaj ntsig ntawm API 5LD Clad Steel Pipes
API 5LD clad pipelines muaj ntau qhov zoo piv rau cov pa roj carbon steel thiab cov kav dej CRA khov kho.
● Kev Siv Nyiaj Zoo
Cov kav dej clad txo cov nqi khoom siv piv rau cov kav dej hlau uas tiv taus corrosion.
● Muaj Zog Siab
Cov yeeb nkab carbon steel backing muab lub zog zoo heev thiab kev tiv taus siab.
● Kev Tiv Thaiv Kev Kub Ntxhov Zoo Tshaj Plaws
Lub CRA liner tiv thaiv cov kav dej los ntawm cov tshuaj lom neeg thiab cov kua dej corrosive.
● Lub Neej Ua Haujlwm Ntev
Cov kav dej API 5LD clad yog tsim los rau kev ua haujlwm ntev hauv cov roj thiab cov pa roj hnyav.
● Muaj Peev Xwm Loj
Cov kav dej uas muaj cov hlau nplaum thiab cov kav dej sib txuas tuaj yeem tsim tau hauv cov kab uas loj uas nyuaj rau ua tiav nrog cov kav dej CRA khov kho.
● Cov txiaj ntsig no ua rauAPI 5LD cov kav dej uas tiv taus xebib qho kev daws teeb meem zoo tshaj plaws rau cov roj thiab roj av niaj hnub.
Cov Kev Siv Ib Txwm ntawm API 5LD Clad thiab Lined Pipes
API 5LD cov kav dej uas tiv taus xeb siv rau ntau yam kev siv roj thiab roj av.
Cov ntawv thov feem ntau muaj xws li:
Cov kav dej roj thiab roj av hauv hiav txwv
Cov kab dej hauv qab dej hiav txwv
Cov txheej txheem sau cov roj qaub
Cov kav dej uas tsim tawm
Cov kav dej txhaj dej hiav txwv
Cov kav dej hydrocarbon ntau theem
Cov kav dej ua haujlwm ntawm cov chaw ua roj refinery
Cov kab ke kav dej no xav tau ob qho tib silub zog kho tshuab siab thiab kev tiv thaiv corrosion zoo heev, uaAPI 5LD clad steel yeeb nkabib qho kev daws teeb meem zoo tagnrho.
Womic Steel: Koj Tus Khub Rau API 5LD Clad & Lined Pipes
Womic Steeltsis yog tsuas yog ib lub chaw tsim cov yeeb nkab xwb; nws yog ib qho chaw muab kev daws teeb meem rau kev tswj xeb. Peb lub zog tseem ceeb suav nrog:
●Kev Sib Txuas Lus Phaj-rau-Yeeb Yeeb Tseeb:Peb qhov kev sib ze thiab kev koom tes nrog kev siv tshuabWomicSteel, ib lub tuam txhab tsim khoom loj tshaj plawscov phaj sib txuas ua ke nrog cov hlau nplaum, muab kev tswj hwm tsis muaj qhov sib piv rau qhov zoo ntawm cov khoom siv raw, cov khoom xa tuaj, thiab kev txhim kho. Kev koom ua ke no ua kom muaj qhov tseem ceeb ntawm "kev xa khoom ntsuab" rau kev nrhiav khoom siv, txhais tau tias lub sijhawm ua khoom sai dua thiab zoo ib yam.
● Muaj Peev Xwm Tshawb Fawb thiab Kev Txhim Kho Siab Tshaj Plaws:Peb tau koom tes tsim cov txheej txheem tsim khoom siab heev nrog Lub Tsev Kawm Ntawv Tshawb Fawb Hlau, Hunan University of Science thiab Technology, thiab lwm tus khub koom tes ua lag luam. Qhov no tau ua rau muaj kev sim ua tiav ntawm cov kav dej loj xws liφ1016mm X65M + Alloy 625thiabφ1067mm L360M + 316L.
● Cov Khoom Muag Muaj Peev Xwm:Peb muab ob qho tib sicov kav dej hlau sib txuas ua ke(Φ508–1422mm) thiabcov kav dej uas tau vuam ua ke(Φ430–1422mm), npog tag nrho cov spectrum ntawmCRAcov ntaub ntawv xav tau los ntawm kev lag luam roj thiab roj av.
● Cov Ntaub Ntawv Qhia Txog Kev Ua Tau Zoo:Peb pab neeg tau ua tiav hauv kev txhawb nqa peb cov kev daws teeb meem rau cov neeg ua haujlwm thoob ntiaj teb xws li ADNOC thiab xa cov haujlwm rau cov ntawv thov kev lag luam tseem ceeb, qhia txog peb txoj kev cog lus rau qhov zoo thiab kev ua haujlwm zoo tshaj plaws.
Xaiv Womic Steel rau koj qhov project tom ntej uas xav tau cov kav dej API 5LD uas ua haujlwm tau zoo thiab pheej yig.Tiv tauj peb los tham txog koj cov kev xav tau tshwj xeeb thiab cov teeb meem ntawm qhov project.
Peb txaus siab rau peb cov kev pabcuam kho kom haum rau koj, cov voj voog tsim khoom sai, thiab lub network xa khoom thoob ntiaj teb, kom ntseeg tau tias koj cov kev xav tau tshwj xeeb tau raug ua tiav nrog kev ua tib zoo thiab kev ua tau zoo.
Lub Vas Sab:www.womicsteel.com
Email: sales@womicsteel.com
Xov tooj/WhatsApp/WeChat: Victor: +86-15575100681 los yog Jack: +86-18390957568
Lub sijhawm tshaj tawm: Lub Peb Hlis-09-2026




