Khoom nta
Zoo zog thiab toughness match (core kom zoo dua)
Lub ntsiab kom zoo dua ntawm API 5L X52 nyob rau hauv nws zoo heev sib npaug ntawm lub zog thiab toughness. Ua tsaug rau nws cov qauv qis -carbon micro- alloyed tsim (cov ntsiab lus carbon tsawg dua lossis sib npaug li 0.16-0.28%) thiab TMCP tswj dov thiab txias txheej txheem, X52 tswj tau qhov zoo qis- kub cuam tshuam toughness thaum kom ntseeg tau qhov tsawg kawg nkaus yield zog ntawm 360 MP thiab tensile zog ntawm 360 MP. Nws lub zog tawm los yog kwv yees li 1.24 npaug ntawm X42 (290 MPa), ua rau nws yog cov khoom siv zoo tshaj plaws rau kev siv nruab nrab-siab sib kis.
|
Performance indicators, As |
PSL1 Cov Lus Qhia |
PSL2 Cov Lus Qhia |
|
Yam tsawg kawg nkaus tawm lub zog (MPa) |
360 |
360 |
|
Maximum Yield zog (MPa) |
- |
530 |
|
Yam tsawg kawg Tensile Strength (MPa) |
460 |
460 |
|
Maximum Tensile zog (MPa) |
- |
760 |
|
Yield ratio |
- |
Feem ntau Tsawg dua lossis sib npaug rau 0.90-0.93 |
|
Elongation |
Ntau dua lossis sib npaug li 23% |
Ntau dua lossis sib npaug li 23% |
Nco tseg: PSL2 txwv kev txwv ntawm ob qho tib si lub zog siab tshaj plaws thiab lub zog tensile siab tshaj plaws (nrog rau qhov txwv siab tshaj ntawm kwv yees li 530 MPa thiab 760 MPa, raws li), kom ntseeg tau tias cov khoom muaj peev xwm deformation ntawm cov yas txaus thiab cov npoo muaj kev ruaj ntseg ntau dua kom tsis txhob muaj kev puas tsuaj los ntawm cov khoom lag luam ntau dhau los ntawm kev tawm los ntau dhau - rau -tensile
Kev ua tau zoo welding zoo (qhov yuav tsum tau muaj rau cov kav dej hlau)
Qhov qis carbon sib npaug tsim ntawm API 5L X52 ua kom cov vuam ua tau zoo, uas yog qhov yuav tsum tau ua rau loj - nplai kev tsim kho ntawm cov kav dej hlau. Qib PSL2 yuav tsum muaj cov pa roj carbon sib npaug (CEIIW) Tsawg dua lossis sib npaug ntawm 0.43 thiab Pcm Tsawg dua lossis sib npaug ntawm 0.25, ua kom muaj zog zoo thiab ua haujlwm rau qhov txias tawg hauv tshav kub- thaj tsam cuam tshuam hauv thaj chaw vuam.
Cov ntsiab lus tseem ceeb Welding:
• Tsawg tus nqi CE:
Ua tau zoo txo qhov nyiam ntawm vuam cua sov- thaj tsam cuam tshuam kom tawv thiab txo qhov kev pheej hmoo ntawm cov kab mob khaub thuas
• Tsawg- phom sij- ntsiab lus:
Cov ntsiab lus S yog nruj me ntsis tswj nyob rau theem qis kom ntseeg tau qhov purity ntawm vuam thiab cov khoom siv hauv paus
• Haum rau ntau txoj kev vuam:
taub qab vuam ntawm seamless steel kav, submerged arc vuam ntawm kauv / ncaj seam welded kav, thiab lwm yam., nrog zoo teb nplhaib vuam kev ua tau zoo
Rau qib PSL1, qhov txwv sab sauv ntawm cov ntsiab lus carbon yog qhov dav (tsawg dua lossis sib npaug li 0.28% rau cov kav dej tsis sib haum, Tsawg dua lossis sib npaug li 0.26% rau cov kav dej welded), thiab preheating ntawm 100-150℃yog pom zoo thaum vuam. Rau qib PSL2, qhov yuav tsum tau muaj cov ntsiab lus carbon yog nruj dua (tsawg dua lossis sib npaug li 0.20-0.22%), ua rau muaj kev sib txuas zoo dua, thiab feem ntau tsis muaj qhov tshwj xeeb preheating lossis tsuas yog qis dua preheating kub.
Zoo qis -kub toughness thiab tsis kam rau nkig tawg
API 5L X52 PSL2 qib yuav tsum tau Charpy V-kev ntsuas qhov cuam tshuam kom ntseeg tau tias cov khoom siv tiv thaiv kom tawg tawg nyob rau hauv qis- qhov kev pabcuam kub. Qhov nplua -grained microstructure tau los ntawm cov txheej txheem TMCP tau txhim kho cov khoom qis- qhov kub thiab txias, ua rau X52 kab yeeb nkab hlau tuaj yeem siv tau rau hauv cov cheeb tsam txias thiab ib puag ncig nrog lub caij kub hloov pauv loj.
Yam cuam tshuam toughness Performance index (PSL2):
• Kev ntsuas kub: Feem ntau -20℃lossis qis dua (raws li tus neeg siv yuav tsum tau ua)
• Yam tsawg kawg nkaus lub zog: Ntau dua lossis sib npaug ntawm 27 J (tus nqi nruab nrab) / Ntau dua lossis sib npaug rau 20 J (tus nqi ib leeg)
Zoo corrosion kuj thiab ib puag ncig adaptability
API 5L X52 nthuav tawm zoo tiv thaiv corrosion tsis zoo nyob rau hauv ib txwm atmospheric, dej tshiab, av, thiab roj thiab gas media. Rau cov kev pabcuam acidic (muaj H₂S), API 5L PSL2 Cov Ntawv Ntxiv J muab cov kev xav tau ntxiv rau cov kav dej qaub, suav nrog cov ntsiab lus ntawm cov sulfur qis (tsawg dua lossis sib npaug li 0.002%) thiab kev tshawb xyuas nruj dua ntawm HIC / SSC kev ua haujlwm tsis zoo.
Rau ib puag ncig marine, qib PSL2 tuaj yeem xaiv nrog rau kev tiv thaiv zoo - cov txheej txheem corrosion (xws li 3PE, FBE), tsim nyog rau cov kav dej sab nrauv thiab cov kav dej hauv qab.
Zoo txias khoov thiab kev ua haujlwm zoo
API 5L X52 muaj cov pa roj carbon tsawg thiab cov txiaj ntsig nruab nrab - rau -tensile piv (feem ntau Tsawg dua lossis sib npaug rau 0.93 rau PSL2), uas muab nws zoo txias khoov formability. Nws yog tsim rau txias - khoov yeeb nkab ntau lawm thiab tuaj yeem siv los tsim kub -bent luj tshib los ntawm cov txheej txheem kub bending. Nws kuj pom zoo shearing, blanking, thiab yob txoj kev ua haujlwm nyob rau hauv coil thiab phaj tej yam kev mob.
Technical Specifications
Tshuaj muaj pes tsawg leeg (API Spec 5L / ISO 3183)
|
Lub ntsiab |
PSL1 Seamless Tube |
PSL1 welded yeeb nkab |
PSL2 |
Nco tseg |
|
C |
Tsawg dua lossis sib npaug li 0.28% |
Tsawg dua lossis sib npaug li 0.26% |
Tsawg dua lossis sib npaug li 0.20-0.22% |
Tsawg- carbon tsim los xyuas kom meej weldability thiab qis- kub toughness |
|
Mn |
Tsawg dua lossis sib npaug li 1.40% |
Tsawg dua lossis sib npaug li 1.40% |
Tsawg dua lossis sib npaug li 1.40% |
Kev daws teeb meem ntxiv dag zog, txhim kho lub zog |
|
P |
Tsawg dua lossis sib npaug li 0.030% |
Tsawg dua lossis sib npaug li 0.030% |
Tsawg dua lossis sib npaug li 0.025% |
Cov khoom tsis zoo, tswj nruj heev |
|
S |
Tsawg dua lossis sib npaug li 0.030% |
Tsawg dua lossis sib npaug li 0.030% |
Tsawg dua lossis sib npaug li 0.015% |
Cov khoom tsim kev puas tsuaj, tswj nruj me ntsis kom ntseeg tau tias qis -kub toughness |
|
Si |
Tsawg dua lossis sib npaug li 0.45% |
Tsawg dua lossis sib npaug li 0.45% |
Tsawg dua lossis sib npaug li 0.45% |
Deoxidizer, txhim kho lub zog |
|
V |
Tsawg dua lossis sib npaug li 0.05% |
Tsawg dua lossis sib npaug li 0.05% |
Tsawg dua lossis sib npaug li 0.10% |
Microalloying cov ntsiab lus, nag lossis daus muaj zog |
|
Nb |
Tsawg dua lossis sib npaug li 0.05% |
Tsawg dua lossis sib npaug li 0.05% |
Tsawg dua lossis sib npaug li 0.05% |
Microalloying ntsiab, tswj dov rau nplua nplej |
|
Ti |
Tsawg dua lossis sib npaug li 0.04% |
Tsawg dua lossis sib npaug li 0.04% |
Tsawg dua lossis sib npaug li 0.04% |
Microalloying cov ntsiab lus, nag lossis daus muaj zog |
|
CEIIW |
- |
- |
Tsawg dua lossis sib npaug li 0.43% |
Carbon sib npaug, tswj weldability |
|
Pcm |
- |
- |
Tsawg dua lossis sib npaug li 0.25% |
Crack Sensitivity Index |
|
Fe |
Cov khoom seem (≈ 97%) |
Cov khoom seem (≈ 97%) |
Cov khoom seem (≈ 97%) |
Matrix element |
Lub cev muaj zog
|
Khoom |
Tus nqi / Ntau |
Kev Xeem |
|
Qhov ntom |
7.85 g / cm³ |
Chav ntsuas kub (20 degree) |
|
Melting Point |
≈ 1420-1460 degree |
--- |
|
Elastic modulus |
Qhov siab tshaj plaws ntawm qhov siab ntawm GPa |
Chav ntsuas kub |
|
Thermal conductivity |
≈ 50 W/(m·K) |
Chav ntsuas kub |
|
Coefficient ntawm Thermal Expansion (20-100 degree) |
≈ 12.0 × 10⁻⁶ /K |
--- |
|
Poisson tus ratio |
≈ 0.28 |
Chav ntsuas kub |
Mechanical Properties (Tus nqi zoo)
|
Kev ua tau zoo |
PSL1 |
PSL2 |
Cov qauv kev coj ua |
|
Yam tsawg kawg nkaus Yield Strength |
360 MPa siab |
360 MPa siab |
API Spec 5L / ISO 3183 Daim Ntawv Pov Thawj |
|
Maximum Yield zog |
- |
530 MPa ua |
API Spec 5L / ISO 3183 Daim Ntawv Pov Thawj |
|
Yam tsawg kawg Tensile Strength |
460 MPa rau |
460 MPa rau |
API Spec 5L / ISO 3183 Daim Ntawv Pov Thawj |
|
Maximum Tensile Strength |
- |
760 MPa ua |
API Spec 5L / ISO 3183 Daim Ntawv Pov Thawj |
|
Elongation |
Ntau dua lossis sib npaug li 23% |
Ntau dua lossis sib npaug li 23% |
API Spec 5L |
Lus Cim: Tus 'X52' hauv API 5L X52 qhia qhov tsawg kawg nkaus lub zog ntawm 52,000 psi (kwv yees li 360 MPa), nrog tus lej sawv cev ntau txhiab phaus ib square inch (ksi). Lub zog tawm los ntawm cov khoom siv yeeb nkab feem ntau yog nyob nruab nrab ntawm 380-480 MPa, thiab lub zog tensile ntawm 470-550 MPa.
Siv tau Media
1. Cov pa roj carbon monoxide, roj av, thiab cov roj ua kom zoo: cov kab hauv lub cev thiab cov ceg ntoo kom ntev - kev thauj mus los deb
2. Dej thiab slurries: dej pipelines, slurry thauj
3. Chemical media: cov kav dej hauv cov nroj tsuag tshuaj
4. Cov pa hauv nroog: nruab nrab thiab siab - cov pa roj sib txuas hauv nroog
5. Cov kav dej muaj zog: cov qauv hauv tsev, lub tsho platform (tsis yog-ib puag ncig corrosive)
6. General corrosive ib puag ncig: pa av, huab cua, thiab dej tshiab
Lus Cim: API 5L X52 tsis haum rau siab - kub, siab - siab, muaj zog acidic media (xws li siab -kub concentrated hydrochloric acid thiab hydrofluoric acid). Nyob rau hauv acidic roj thiab roj ib puag ncig uas muaj H₂S, cov ntaub ntawv qib tshwj xeeb tau teev tseg hauv Cov Ntawv Ntxiv J ntawm API 5L PSL2 (acid-}cov kav dej) yuav tsum raug xaiv, nrog rau kev tswj ntxiv ntawm cov ntsiab lus sulfur, hardness, thiab HIC tsis kam ua haujlwm.
Cov Khoom Muag Khoom thiab Txheej Txheem Ua Haujlwm
Seamless steel yeeb nkab (Seamless)
Txheej Txheem: Kub Rolling Piercing + Extension Rolling
Txoj kab uas hla: 21.3 - 1067 mm (1/2" - 42")
Phab ntsa thickness ntau: 2 - 150 hli
Nta: Seamless, siab siab- bearing peev xwm, haum rau siab - roj thiab roj mainlines
Cov ntawv thov ib txwm: siab- kev thauj mus los ntawm cov dej siab, roj thiab roj qhov chaw sib sau ua ke thiab xa cov kav dej
Ncaj Seam Siab -Frequency Resistance Welded Pipe (ERW)
Txheej txheem: Kub- dov coil → Txias dabtsi yog khoov txoj kev → High- zaus kuj welding
Sab Nrauv Qhov Loj: Feem ntau Tsawg dua lossis sib npaug li 610 mm (24 ")
Phab ntsa thickness ntau: Feem ntau Tsawg dua los yog sib npaug li 20 hli
Nta: High dimensional precision, high efficiency efficiency, thiab cov nqi tseem ceeb
Cov ntawv thov ib txwm: nruab nrab thiab qis- cov roj thiab cov kav dej siab, cov kav dej hauv nroog, thiab cov kav dej
Vuam Thaum tshav kub kub Input Control: High- zaus vuam ntawm ntau dua los yog sib npaug rau 100 kHz (PSL2 yuav tsum tau) kom ruaj khov weld zoo
Spiral Submerged Arc Welded Pipe (SSAW)
Txheej txheem: Kub- dov coil → Kauv txoj kev → Dual -sided submerged arc vuam
Sab Nraum Sab Nraud: Feem ntau 219 - 2500 hli
Phab ntsa thickness ntau: 6 - 25 hli
Nta: Qhov loj txoj kab uas hla muaj qhov zoo tshaj plaws, tso cai rau steel strips ntawm tib lub dav los tsim ntau yam diameters. Qhov kev ntxhov siab ntawm kauv welds tsuas yog 75-90% ntawm qhov ncaj seams, ua rau lawv tiv taus siab dua. Raws li txoj cai, lawv tuaj yeem ua tsis tu ncua hauv qhov ntev ntev.
Cov ntawv thov ib txwm: loj - txoj kab uas hla dej / roj xa hluav taws xob, lub tsho sab nrauv engineering
Ncaj Seam Submerged Arc Welded Pipe (LSAW)
Txheej Txheem: Hlau Phaj → JCOE Forming / UOE Forming → Dual -Sided Submerged Arc Vuam
Outer Diameter: 406 - 1620 hli (16" - 64")
Phab ntsa thickness ntau: 6 - 50 hli
Nta: luv welds, tsawg vuam cov khoom siv, ntau yam ntawm sab nraud txoj kab uas hla thiab phab ntsa thickness
Cov ntawv thov ib txwm: siab- siab ntev- cov kav xa mus rau qhov deb, cov kav dej hauv qab, cov roj thiab roj sib sau ua ke thiab kev thauj mus los mainlines
Siv tau Standards thiab Delivery Condition
Txuj: API Spec 5L, ISO 3183, GB / T 9711
Khoom Specification Level: PSL1 (Basic Level), PSL2 (Enhanced Level)
Kev xa khoom: Kub- dov, Tswj Rolling (TMCP), Normalized, Normalized Rolling, Kub Kho (Quenching + Tempering), thiab lwm yam.
Kev Ua Haujlwm Kawg: Flat Ends, Beveled Ends, Threaded Ends, Tshwj Xeeb Fitting Ends
Daim ntawv pov thawj: Thaum ua raws li PSL2 cov cai, yuav tsum tau muab daim ntawv pov thawj ua raws (SR15.1 yuav tsum tau ua) thiab tag nrho - txheej txheem traceability yuav tsum tau ua (SR15.2 yuav tsum tau ua).
Txoj Cai Kho Mob thiab Vuam Cov Ntsiab Lus
Qhov kawg kev ua tau zoo ntawm API 5L X52 nyob ntawm TMCP tswj dov thiab tswj cov txheej txheem txias:
1. Tswj Rolling and Controlled Cooling (TMCP, siv kom tau txais ib qho zoo -grained microstructure thiab pom zoo txhua yam khoom):
Thaum tshav kub kub mus rau 1100-1200℃rau ntxhib dov, ces ua tswj dov nrog txo loj nyob rau hauv lub 850-950℃tiav kub ntau yam (dov nyob rau hauv lub non-recrystallization cheeb tsam), ua raws li los ntawm kev tswj kom txias nyob rau hauv 600-800℃. Qhov no ua rau muaj qhov sib xws thiab zoo ferrite + pearlite microstructure (grain loj feem ntau ntau dua lossis sib npaug rau 9) kom ntseeg tau tias muaj kev sib npaug ntawm lub zog thiab tawv.
2. Tshaj tawm -weld Kev kho cua sov (yog tias xav tau):
Yog tias yuav tsum tau muaj kev ntxhov siab tom qab cov yeeb nkab nplhaib vuam vuam, tom qab- vuam cua sov kho ntawm 550-650℃rau 1-2 teev tuaj yeem ua tau. Kev kho cua sov tom qab vuam yuav tsum tau them sai sai rau kev tswj cov cua sov thiab cua txias kom tsis txhob cuam tshuam cov microstructure thiab cov khoom ntawm cov khoom siv hauv paus.
Lus ceeb toom tseem ceeb:
Nyob rau hauv cov pa roj thiab roj kis ib puag ncig yam tsis muaj H₂S, kev ntxhov siab kev kho cua sov feem ntau tsis tas yuav tsum tau tom qab vuam.
Rau cov kav xa dej hauv ib puag ncig acidic (muaj H₂S), yuav tsum ua raws li Cov Lus Qhia Ntxiv J ntawm API 5L PSL2 kom tsis txhob muaj kev nyuaj siab ntau dhau los ntawm kev tsis raug cai -weld heat treatment.
Thaum lub sij hawm vuam, kev tswj xyuas nruj ntawm cov khoom siv hluav taws xob thiab kev sib tshuam ntawm qhov kub thiab txias yuav tsum tau tiv thaiv cov nplej coarsening hauv tshav kub- cuam tshuam cheeb tsam.
API 5L X52 (L360) yog qhov tsim nyog rau nruab nrab thiab siab -cov roj thiab roj xa mus, cov kav dej hauv nroog, thiab cov ntawv thov cov yeeb nkab. Nws raug pom zoo siv rau hauv cov chaw hauv qab no:
Daim ntawv thov teb
-
Kev sib sau roj thiab roj ntuj thiab ntev -Kev thauj mus los
● Cov kab lub cev tseem ceeb thiab cov kab ntawm cov kav ntev ntev -cov kav dej thiab cov roj av
● Sab hauv cov roj sib sau ua ke thiab kev thauj mus los hauv cov roj av
● Gas teb raw roj sib sau ua ke thiab kev thauj mus los pipeline -
Nroog gas pipeline network
● Nruab nrab thiab siab -siab roj kis tau tus mob thiab kev faib cov kav dej sib txuas
● Inlet thiab qhov hluav taws xob pipelines ntawm nroog gas siab tswj chaw nres tsheb -
Water Conveyance and Irrigation Engineering
● Ntev -kab dej xa mus rau qhov deb
● Cov kav dej txuas ntxiv rau cov kwj dej hauv thaj av. -
Chemical Engineering thiab Industrial Piping
● Tshuaj cog txheej txheem kav
● Chaw nres tsheb fais fab circulating dej yeeb nkab
● Cov dej txias muaj qhov system -
Tus Qauv Tubing
● Lub tsev steel qauv txhawb cov yeeb nkab
● Offshore Platform Jacket (Tsis yog-Corrosive Areas)
● Cov kav dej rau cov pob zeb hauv paus
● Kev sib kis kab ntauwd cov yeeb nkab
Kev xa khoom thiab Customization
Peb muab cov kev daws teeb meem hloov tau yooj yim thiab txhim khu kev qha kom ntseeg tau tias koj tau txais API 5L X52 kab yeeb nkab uas haum rau koj qhov kev xav tau.
|
Daim ntawv |
 Seamless Hlau
Yeeb |
 Ncaj Seam Resistance
Welded yeeb nkab (ERW) |
 Spiral Submerged Arc
Welded yeeb nkab (SSAW) |
 Ncaj Seam Submerged Arc
Welded Pipe (LSAW) |
|---|---|---|---|---|
|
Pauv ntau yam |
Sab nraud txoj kab uas hla: 21.3 - 1067 hli; |
Sab nraud txoj kab uas hla: 21.3 - 610 hli; Phab ntsa Thickness: 2 - 20 hli |
Sab nraud txoj kab uas hla: 219 - 2500 hli; Phab ntsa Thickness: 6 - 25 hli |
Sab nraud txoj kab uas hla: 406 - 1620 hli; Phab ntsa Thickness: 6 - 50 hli |
|
Customization Muaj peev xwm |
Kub-khoov seamless kav, tsau-ntev txiav, bevel machining, yeeb nkab kawg threads, tshwj xeeb kub kho tej yam kev mob |
Siab- zaus ncaj- seam welded kav, tsau -ntev txiav, bevel ua, galvanization / yas txheej kho |
Loj - txoj kab uas hla kauv welded kav, tsau-ntev txiav, bevel ua, tiv thaiv- txheej txheej (FBE/3PE) |
JCOE / UOE txoj kev, ntev txiav, bevel machining, tshwj xeeb yeeb nkab kawg kho |
Vim li cas thiaj xaiv peb? - Txhim khu kev qha Engineering Technology. Dependable xa khoom.
Peb tsis yog ib tus neeg muag khoom xwb, tab sis yog ib tus neeg koom tes nrog cov ntaub ntawv ntseeg siab rau koj hauv Suav teb.
Vertically Integrated Production
Muaj 20,000㎡ qhov chaw nrog 10+ automated kab (8, 000+ tons / xyoo). Hauv - tsev cuab yeej & qhov chaw tuag ua rau muaj kev hloov kho sai thiab tswj tus nqi zoo - tsis muaj tus neeg nruab nrab kos npe.
Kev Tswjhwm nruj nruj ntawm txhua theem
Tag nrho traceability nyob rau hauv lub tseem ceeb QC checkpoints thoob plaws hauv ntau lawm . 100% raws li ASTM/ASME, EN, thiab GB qauv. Cov ntaub ntawv xeem cov ntaub ntawv muaj nyob nrog txhua qhov khoom xa tuaj.
Txhim khu kev xa khoom & Export ntim
10+ xyoo xa tawm mus rau Tebchaws Europe, North America, Southeast Asia & Middle East nrog cov dej tsis zoo thiab tiv thaiv- xeb, ua ke nrog cov kev xaiv thauj khoom yooj yim kom muaj kev nyab xeeb thiab nyob rau - lub sijhawm tuaj txog.
Qauv validation ua ntej pawg ntau lawm
Peb muab cov qauv dawb rau kev kuaj xyuas zoo, tso cai rau koj tso cov xaj xaj tsuas yog tom qab kev pom zoo. Peb xyuas kom meej qhov sib xws los ntawm cov qauv mus rau cov khoom loj los ntawm qhov ntsuas qhov tseeb thiab kev tsim pob tshab.
FAQ
Q: Dab tsi yog qhov zoo ntawm API 5L X52?
Q: Qhov txawv ntawm API 5L X52 PSL1 thiab PSL2 yog dab tsi? Yuav xaiv li cas?
Q: Qhov txawv ntawm API 5L X42, X52, X60, thiab X65 yog dab tsi? Yuav ua li cas xaiv ntawm lawv?
Q: Qhov siab tshaj plaws ua haujlwm kub rau API 5L X52 yog dab tsi?
Q: Dab tsi yog qhov vuam kev ua tau zoo ntawm API 5L X52?
Q: Dab tsi yog qhov corrosion kuj ntawm API 5L X52?
Q: API 5L X52 puas tuaj yeem hloov ASTM A53 lossis cov yeeb nkab qauv?
Cim npe nrov: api 5l x52, Tuam Tshoj api 5l x52 manufacturers, lwm tus neeg, Hoobkas
