Stainless hlau Welded Yeeb Nkab

Ib qho ntawm qhov zoo ntawm stainless hlau tshaj 316 stainless hlau yog tias nws yog biocleaner tshaj txhuas thiab tooj liab, nrog rau cov tshuaj ntsuab piv rau iav. Qhov huv, lub zog thiab corrosion tsis kam ntawm stainless hlau tau ua kom tiav kev siv ntawm stainless hlau hauv cov nroj tsuag thiab khoom noj ua khoom noj.

Lub siab molybdenum cov ntsiab lus ntawm 254smo stainless hlau ua kom nws muaj cov oxidation ntau dua thaum anneered, ua rau muaj kev sib tw sib txawv tom qab siv cov hlau qub. Txawm li cas los xij, qhov no tsis muaj cov phom sij ntawm txoj kev xeb tawm tsam ntawm cov hlau.

ASTM A312 TP316 yog tus qauv txheem rau kev sib khi, ncaj-leeg welded, thiab hnyav txias welded ustenitic kav hlau stainless hlau thiab kev corrosive service. Lub 316 seamless muaj steel yeeb nkab yog tsim los ntawm kev sib xyaw ntawm cov chromium, npib tsib, thiab molybdenum ua rau corrosion thiab xeb thiab xeb thiab xeb thiab xeb.

Al6XN yog superaustenitic steel hlau nrog kev ua tau zoo rau chloride pitting, crevice corrosion thiab kev nyuaj siab corrosion tawg. Al6XN yog 6 Moly alloy uas tau tsim rau thiab siv hauv kev sib cav sib ceg siab. Nws muaj cov npib tsib xee (24%), Molybdenum (6.3%), nitriumen thiab chromium cov ntsiab lus tawg, thiab tshwj xeeb corrosion tiv thaiv. Al6XN yog feem ntau siv rau nws cov kev txhim kho pitting thiab crevice corrosion tsis kam hauv chlorides. Nws yog ib qho tsim nyog thiab weldable stainless hlau.

304 Stainless hlau Tube tshav kub kub kev kho cua sov, daws kev kho (anealing kev kho (anealing) - cua sov mus rau 1010-11200C thiab txias nrawm. Cov menyuam kawm ntawv no tsis tuaj yeem ua tau zoo los ntawm kev kho cua sov.

316L 1.4401 tus yeeb nkab stainless hlau yog ib qho kev xaiv yeeb nkab zoo heev thiab cov yeeb nkab ruaj khov siv hauv ntau cov ntawv siv. Qhov no ss s31603 yeeb nkab yog tsim los ntawm cov hlau zoo 316L stainless ua rau corrosion, oxidation thiab staining rau cov chaw hnyav lossis kev siv ntxhov siab.

Stainless hlau yog ruaj, tiv thaiv kev corrosion los ntawm Fausical tshuaj, roj, thiab roj av, thiab tiv thaiv siab thiab muaj kev kub siab. Hom 304 stainless hlau, ib qho khoom siv chromium-npib tsib xickel tshwm sim los ntawm dej, cua sov, ntsev, zaub mov, thiab peaty av.
Nickel Alloy Flanges
Stainless hlau
Duplex Steel
Tsev »
www.htsteelpipe.com
https: \ / \ / www.htpipe.com \ / stainpipe
Alloy Hlau Daim Hlau & Cov Ntawv Qhia & Coils
ASTM A213 316L ERW YEEB
Seamless Stainless Hlau Tube Thiab Yeeb Nkab
ASTM A269 Alloy 254 Seamless Yeeb Nkab Khoom Lag Luam
Tsim cov qauv ASME B36.10 ASME B36.22

Stainless hlau yog ib qho ntawm cov khoom nrov tshaj plaws thiab ntau yam. Cov yeeb nkab stainless hlau siv tau siv hauv cov ntawv thov uas muaj lub zog kub siab thiab zoo dua corrosion yog qhov tseem ceeb. Ntxiv mus, stainless hlau yooj yim los ntxuav thiab tsis¡nish.
Nickel Alloy Flanges
Stainless hlau
Duplex Steel
Tsev »
www.htsteelpipe.com
https: \ / \ / www.htpipe.com \ / stainpipe
Alloy Hlau Daim Hlau & Cov Ntawv Qhia & Coils
ASTM A213 316L ERW YEEB
Seamless Stainless Hlau Tube Thiab Yeeb Nkab
ASTM A269 Alloy 254 Seamless Yeeb Nkab Khoom Lag Luam
Tsim cov qauv ASME B36.10 ASME B36.57

304 Stainless hlau yog ib cov khoom siv hauv stainless hlau, nrog qhov ceev ntawm 7.93 g \ / cm3, tseem hu ua 18 \ / 8 stainless hlau hauv kev lag luam. Cov kev kub siab kuj ua tau ntawm 800 æ æ æ, kev ua zoo ua tau zoo, muaj kev ruaj khov, siv tau dav hauv kev lag luam thiab kev lag luam kho mob.
Alloy Hlau Bars & Rods
Stainless hlau
Duplex Steel
Tsev »
www.htsteelpipe.com
https: \ / \ / www.htpipe.com \ / stainpipe
Stainless Hlau Daim Hlau & Cov Ntawv Qhia & Coils
ASTM A213 316L ERW YEEB
Seamless Stainless Hlau Tube Thiab Yeeb Nkab

Cov kev siv hluav taws xob sib xyaw rau hom 316 Stainless hlau muaj xws li siv cov khoom siv hluav taws xob, cov tshuab hluav taws xob, cov khoom siv hluav taws xob, cov khoom siv siv tshuaj lom neeg, tso tsheb hlau luam thiab evaporators thiab evaporators. Nws kuj yog siv rau hauv pulp, ntawv thiab cov khoom siv ua tiav thiab txhua yam khoom siv raug rau cov tub rog marine.
Nickel Alloy Flanges
Stainless hlau
Duplex Steel
Tsev »
www.htsteelpipe.com
https: \ / \ / www.htpipe.com \ / stainpipe
Alloy Hlau Daim Hlau & Cov Ntawv Qhia & Coils
ASTM A213 316L ERW YEEB
Seamless Stainless Hlau Tube Thiab Yeeb Nkab
ASTM A269 Alloy 254 Seamless Yeeb Nkab Khoom Lag Luam
Tsim cov qauv ASME B36.10 ASME B36.58

Stainless hlau yog ib qho alloy ntawm cov hlau uas tiv taus xeb. Nws muaj tsawg kawg yog 11% chromium thiab tej zaum yuav muaj cov ntsiab lus xws li carbon, lwm yam tsis yog lwm yam kom tau lwm yam uas xav tau. Stainless hlau qhov tsis kam rau corrosion tau los ntawm cov chromium, uas ua cov yeeb yaj kiab passive uas tuaj yeem tiv thaiv cov khoom thiab kho tus kheej nyob rau hauv lub xub ntiag ntawm oxygen.
316L yog qhov kev xaiv zoo dua li 316 yog cov tau rau weld corrosion dua 316L (xeb nyob rau hauv weld). Txawm li cas los xij, 316 tuaj yeem kawm tau kom tiv thaiv weld weld lwj. 316L tseem yog tus hwm ntawm cov hlau tsis muaj qhov kub thiab txias, uas yog vim li cas nws thiaj nrov tshaj plaws nyob rau hauv archanitectural thiab marrine tej yaam num.

304 yog ib lub hom phiaj dav dav uas tsis muaj cov hlau sib tw siv hauv cov cuab yeej siv thiab cov khoom uas yuav tsum tau ua kom zoo tag nrho cov khoom (corrosion tsis kam thiab muaj peev xwm). Txhawm rau kom muaj qhov ua kom haum corrosion tsis kam ntawm cov hlau tsis muaj hlau, cov hlau yuav tsum muaj ntau dua 18% chromium thiab ntau tshaj 8% npib tsib xee. 304 Stainless hlau yog lub stainless hlau qib tsim raws li Asmeskas Astm tus qauv.

Seamless steel kav yog perforated los ntawm tag nrho cov hlau, thiab cov kav hlau sib hloov tsis muaj welds rau saum npoo yog hu ua Seamless Steel Kav. Raws li txoj kev ntau lawm, Seamless Steel kav tuaj yeem muab faib ua cov kav hlau, txias-rub cov kav hlau
Alloy Hlau Bars & Rods
Stainless hlau
Duplex Steel
Tsev »
www.htsteelpipe.com
https: \ / \ / www.htpipe.com \ / stainpipe
Loj od: 1 \ / 2 "" ~ 48 ""
ASTM A213 316L ERW YEEB
Seamless Stainless Hlau Tube Thiab Yeeb Nkab

304 Yeeb nkab yog pab tau qhov kev tu neeg thiab kev nyiam huv yog qhov tseem ceeb. Tsis sib nqus nyob rau hauv anealed mob. Lub zog ua kom muaj zog thiab lub zog tensile yuav tau nce los ntawm kev ua haujlwm txias, tab sis hloov kho cov ntsiab lus ntawm welded nyob qhov twg kev kho cua sov uas tsis siv cua sov.
Nickel Alloy Flanges
Stainless hlau
Duplex Steel
Tsev »
www.htsteelpipe.com
https: \ / \ / www.htpipe.com \ / stainpipe
Alloy Hlau Daim Hlau & Cov Ntawv Qhia & Coils
ASTM A213 316L ERW YEEB
Seamless Stainless Hlau Tube Thiab Yeeb Nkab
ASTM A269 Alloy 254 Seamless Yeeb Nkab Khoom Lag Luam
Tsim cov qauv ASME B36.10 ASME B36.43

Tsis suav txog N08367 tseem hu ua Alloy Al6XN yog cov carbon ntau, siab purity, nitrogen-batoy nrog zoo heev rau chloride pitting thiab compevice corrosion.

254smo ua los ntawm kev muaj peev xwm ntawm Molybdenum, chromium thiab nitrogen muaj zoo tsis kam rau pitting thiab crevice corrosion. Tooj liab hloov kho corrosion tsis kam nyob rau hauv qee cov kua qaub. Tsis tas li ntawd, 254smo muaj kev ntxhov siab zoo corrosion zog corrosion kev tawg vim nws cov ntsiab lus ntawm npib tsib xee, chromium thiab molybdenum.
Alloy Hlau Bars & Rods
Stainless hlau
Duplex Steel
Tsev »
www.htsteelpipe.com
https: \ / \ / www.htpipe.com \ / stainpipe
Stainless Hlau Daim Hlau & Cov Ntawv Qhia & Coils
ASTM A213 316L ERW YEEB
Seamless Stainless Hlau Tube Thiab Yeeb Nkab

Lub 316 cov yeeb nkab stainless hlau tau dhau los ua cov khoom siv tsis tau rau cov kev lag luam lag luam. Qhov no alloy ntawm hlau thiab chrome tau lees paub rau nws lub siab tiv taus corrosion, nrog rau nws cov kav ntev. 316 Stainless hlau Tubing tuaj yeem tsim nyob rau hauv ob leeg seamless thiab welded leeg kom tau raws li cov neeg siv khoom xav tau.

Stainless 316 qib raug nqi ntau vim lawv zoo corrosion tsis kam. Qhov kev kawm qib siab ntau tshaj plaws yog qhov tshwj xeeb tshaj yog pom zoo rau cov ntawv thov uas cov alloy raug rau chlorinated kev daws teeb meem thiab chlorides, suav nrog dej hiav txwv.
Nickel Alloy Flanges
Stainless hlau
Duplex Steel
Tsev »
www.htsteelpipe.com
https: \ / \ / www.htpipe.com \ / stainpipe
Alloy Hlau Daim Hlau & Cov Ntawv Qhia & Coils
ASTM A213 316L ERW YEEB
Seamless Stainless Hlau Tube Thiab Yeeb Nkab
ASTM A269 Alloy 254 Seamless Yeeb Nkab Khoom Lag Luam
Tsim cov qauv ASME B36.10 ASME B36.22

ASTM A213, Tp304L, Tp306L, Tp316L, 316TI TP317, SP317, S31254, NO8367, NO8926, NO8367, NO867 Astma269TPTPTPTPTPTPTPTPTPTPTPTPTPTPTPTPTPTPTPTPTPTPTPTPTPTPTPTPTPTPTPTPTPTPTPTPTPTPTPTSPTPTSP, TP317, TPP317, S31254, No8367, No8926

904L yog Austenitic stainless hlau khoom. Qhov sib ntxiv ntawm molybdenum yog muab nws zoo heev tiv taus rau cov kev tawm tsam ib cheeb tsam xws li kev sib tw corrosion thiab pitting los ntawm chlorides.
Alloy Hlau Bars & Rods
Stainless hlau
Duplex Steel
Tsev »
www.htsteelpipe.com
https: \ / \ / www.htpipe.com \ / stainpipe
Loj od: 1 \ / 2 "" ~ 48 ""
ASTM A213 316L ERW YEEB
Seamless Stainless Hlau Tube Thiab Yeeb Nkab

Hauv cov roj & roj kev lag luam, kev sib hauj lwm ntawm tubing, seamless tubing yog siv feem ntau rau cov kab tswj, tshuaj txhaj tshuaj, thiab sub-hiav txwv kev nyab xeeb. Cov txheej txheem tshuaj thiab cov cuab yeej kev lag luam tseem muaj cov ntawv siv nrov rau Seamless Tubing suav nrog: Chav & Tshav Kub Kub & Kev Ntsuas thiab kua dej.
Nickel Alloy Flanges
Stainless hlau
Duplex Steel
Tsev »
www.htsteelpipe.com
https: \ / \ / www.htpipe.com \ / stainpipe
Alloy Hlau Daim Hlau & Cov Ntawv Qhia & Coils
ASTM A213 316L ERW YEEB
Seamless Stainless Hlau Tube Thiab Yeeb Nkab
ASTM A269 Alloy 254 Seamless Yeeb Nkab Khoom Lag Luam
Tsim cov qauv ASME B36.10 ASME B36.55

304L 400mm Seamless Stainless Hlau Yeeb Nkab
Zhengzhou Huitong Pipeline Equipment Co., Ltd.
SS Astm A312 TP904L Seamless Kav Tsis Txiav N08904 kav
ASTM A269 Alloy 254 Seamless Yeeb Nkab Khoom yog qhov kawg siab kawg Antenitic Stainless hlau.

Stainless hlau yog ib qho alloy ntawm cov hlau uas tiv taus xeb. Nws muaj tsawg kawg yog 11% chromium thiab tej zaum yuav muaj cov ntsiab lus xws li carbon, lwm yam tsis yog lwm yam kom tau lwm yam uas xav tau. Stainless hlau qhov tsis kam rau corrosion tau los ntawm cov chromium, uas ua cov yeeb yaj kiab passive uas tuaj yeem tiv thaiv cov khoom thiab kho tus kheej nyob rau hauv lub xub ntiag ntawm oxygen.

304l yog qhov xav tau. Thiab nws tsis muaj cov ntsiab lus carbon tsawg kawg nkaus, uas tsis zoo tagnrho rau cov kev siv kub kub uas yuav tsum tau ua, yog li 304H yog thawj qhov kev xaiv. Yog li, 304 feem ntau tsuas yog txwv rau pas nrig lossis cov ntawv txheeb uas yuav tsum tau muab cov khoom siv tog, xws li chav ntxuav tais diav lossis ua noj ua mov, uas tseem tsis tau muab tso cia.
Nickel Alloy Flanges
Stainless hlau
Duplex Steel
Tsev »
www.htsteelpipe.com
https: \ / \ / www.htpipe.com \ / stainpipe
Alloy Hlau Daim Hlau & Cov Ntawv Qhia & Coils
ASTM A213 316L ERW YEEB
Seamless Stainless Hlau Tube Thiab Yeeb Nkab
ASTM A269 Alloy 254 Seamless Yeeb Nkab Khoom Lag Luam
Tsim cov qauv ASME B36.10 ASME B36.48

Muaj 304l stainless hlau, kuj tseem hu ua ultra-tsawg cov roj hlau stainless hlau uas tau dav siv hauv kev tsim cov khoom siv thiab cov khoom uas yuav tsum muaj kev nkag siab zoo (corrosion tsis kam thiab muaj peev xwm).
Nickel Alloy Flanges
Stainless hlau
Duplex Steel
Tsev »
www.htsteelpipe.com
https: \ / \ / www.htpipe.com \ / stainpipe
Alloy Hlau Daim Hlau & Cov Ntawv Qhia & Coils
ASTM A213 316L ERW YEEB
Seamless Stainless Hlau Tube Thiab Yeeb Nkab
ASTM A269 Alloy 254 Seamless Yeeb Nkab Khoom Lag Luam
Tsim cov qauv ASME B36.10 ASME B36.48

Stainless hlau yog ruaj, tiv thaiv kev corrosion los ntawm Fausical tshuaj, roj, thiab roj av, thiab tiv thaiv siab thiab muaj kev kub siab. Hom 304 stainless hlau, ib cov khoom siv chromium-npib tsib xee, ua kom sov, kua zaub, cov zaub mov, thiab peaty utterspe
Alloy Hlau Bars & Rods
Stainless hlau
Duplex Steel
Tsev »
www.htsteelpipe.com
https: \ / \ / www.htpipe.com \ / stainpipe
Loj od: 1 \ / 2 "" ~ 48 ""
ASTM A213 316L ERW YEEB
Seamless Stainless Hlau Tube Thiab Yeeb Nkab

Nws tseem tsis tsim nyog rau anneal nyias seem tom qab vuam. Nws yog dav siv hauv kev lag luam khoom noj khoom haus, dej, tsim kho, tsawg thiab kub thiab kub siv. Dav siv nyob rau hauv Hwm Cutlery, nws tau piav qhia txog li 18 \ / 8, hais txog qhov feem pua ​​ntawm chromium thiab npib tsib xee.
Alloy Hlau Bars & Rods
Stainless hlau
Duplex Steel
Tsev »
www.htsteelpipe.com
https: \ / \ / www.htpipe.com \ / stainpipe
Loj od: 1 \ / 2 "" ~ 48 ""
ASTM A213 316L ERW YEEB
Seamless Stainless Hlau Tube Thiab Yeeb Nkab

Alloy 304 yog cov Austenitic Alloy, uas yog tsim cov qauv loj ntawm npib tsib xee thiab chromium. Lub stainless hlau 304 yeeb nkab \ / raj yog tsim nrog high corrosion thiab oxidation tsis kam tshaj tawm cov khoom.

Stainless hlau 310 \ / 310s yog ib qho kev kub ntxhov tiv thaiv tshav kub alloy nrog oxolo zoo ua rau muaj kev khwm me me txog li 2000Ãf. Nws cov chromium siab thiab cov ntsiab lus ntawm npib nyiaj muab cov khoom siv kub ntau ntxiv, zoo nkauj heev ntawm chav tsev kub, muaj ntau feem ntau ntawm -450¡Ãf, thiab tsawg sib nqus permeability.
Alloy Hlau Bars & Rods
Stainless hlau
Duplex Steel
Tsev »
www.htsteelpipe.com
https: \ / \ / www.htpipe.com \ / stainpipe
Loj od: 1 \ / 2 "" ~ 48 ""
ASTM A213 316L ERW YEEB
Seamless Stainless Hlau Tube Thiab Yeeb Nkab

Stainless hlau yog cov hlau alloy uas muaj tsawg kawg ntawm 10.5% chromium. Alloy cov ntsiab xws li npib tsib, molybdenum, titanium, carbon, roj carbon, thiab tooj liab tuaj yeem txhawb lub zog, thiab lwm yam khoom ntawm stainless hlau. Cov alloys sib txawv muab cov qib sib txawv ntawm cov corrosion tsis kam.
Nickel Alloy Flanges
Stainless hlau
Duplex Steel
Tsev »
www.htsteelpipe.com
https: \ / \ / www.htpipe.com \ / stainpipe
Alloy Hlau Daim Hlau & Cov Ntawv Qhia & Coils
ASTM A213 316L ERW YEEB
Seamless Stainless Hlau Tube Thiab Yeeb Nkab
ASTM A269 Alloy 254 Seamless Yeeb Nkab Khoom Lag Luam
Tsim cov qauv ASME B36.10 ASME B36.69

Cov ntsiab lus txo cov ntsiab lus hauv 316L minimizes muaj kev nyuaj siab ntawm vuam (carbon yog kos tawm ntawm cov hlau thiab reacts nrog chromium thaum ua kom sov, puas xeb tawm tsam). Yog li ntawd, 316L yog siv thaum vuam yog qhov yuav tsum tau ua kom ntseeg tau qhov siab tshaj plaws corrosion.

Lub 304, 316 thiab 316L stainless hlau yog Austenitic, ib lo lus siv los faib cov qauv crystal ntawm cov hlau. Tus qauv ua tiav los ntawm kev kho cua sov thaum muaj kev kub ntxhov ntawm kev txiav txim siab ¨c ib txheej txheem txias uas kaw cov qauv qauv hauv qhov chaw. Austenitic formulations muaj zog dua martensitic lossis ferritic steels. Cov hlau Ferritic yog sib nqus, muaj cov ntsiab lus muaj roj carbon, thiab muaj kev tsis zoo corrosion tsis kam.
Nickel Alloy Flanges
Stainless hlau
Duplex Steel
Tsev »
www.htsteelpipe.com
https: \ / \ / www.htpipe.com \ / stainpipe
Alloy Hlau Daim Hlau & Cov Ntawv Qhia & Coils
ASTM A213 316L ERW YEEB
Seamless Stainless Hlau Tube Thiab Yeeb Nkab
ASTM A269 Alloy 254 Seamless Yeeb Nkab Khoom Lag Luam
1. Laj kab, Tsev Cog Khoom, Qhov Rooj Qhov Rooj, Tsev Cog Khoom

Hom 316 stainless hlau muaj cov ntsiab lus tsib xee ntau dua 304 stillion corrosion, roj, thiab roj av, thiab tiv thaiv lub siab thiab ua kom kub siab. 304 Cov Yeeb Nkab Txuas nrog cov fittings kom thauj cov cua, dej, chav dej, thiab tshuaj lom neeg los tso tsheb hlau luam thiab hauv cov kav dej, thiab cov ntawv thov chav ua noj thiab chav ua noj.
Nickel Alloy Flanges
Stainless hlau
Duplex Steel
Tsev »
www.htsteelpipe.com
https: \ / \ / www.htpipe.com \ / stainpipe
Alloy Hlau Daim Hlau & Cov Ntawv Qhia & Coils
ASTM A213 316L ERW YEEB
Seamless Stainless Hlau Tube Thiab Yeeb Nkab
ASTM A269 Alloy 254 Seamless Yeeb Nkab Khoom Lag Luam
Unic tsis yog N08367 Seamless Tube Al6XN Welded Tube

Stainless hlau yog ib qho alloy ntawm cov hlau uas tiv taus xeb. Nws muaj tsawg kawg yog 11% chromium thiab tej zaum yuav muaj cov ntsiab lus xws li carbon, lwm yam tsis yog lwm yam kom tau lwm yam uas xav tau. Stainless hlau qhov tsis kam rau corrosion tau los ntawm cov chromium, uas ua cov yeeb yaj kiab passive uas tuaj yeem tiv thaiv cov khoom thiab kho tus kheej nyob rau hauv lub xub ntiag ntawm oxygen.
316L yog qhov kev xaiv zoo dua li 316 yog cov tau rau weld corrosion dua 316L (xeb nyob rau hauv weld). Txawm li cas los xij, 316 tuaj yeem kawm tau kom tiv thaiv weld weld lwj. 316L tseem yog tus hwm ntawm cov hlau tsis muaj qhov kub thiab txias, uas yog vim li cas nws thiaj nrov tshaj plaws nyob rau hauv archanitectural thiab marrine tej yaam num.

Hom 316 stainless hlau yog ib tug neeg siv hluav taws xob chromium-npib tsib xee hluav taws xob tsis kam piv rau cov tshuaj yej uas muaj cua daj cua dub xws li seawater, brine daws teeb meem, thiab lwm yam.
Nickel Alloy Flanges
Stainless hlau
Duplex Steel
Tsev »
www.htsteelpipe.com
https: \ / \ / www.htpipe.com \ / stainpipe
Alloy Hlau Daim Hlau & Cov Ntawv Qhia & Coils
ASTM A213 316L ERW YEEB
Seamless Stainless Hlau Tube Thiab Yeeb Nkab
ASTM A269 Alloy 254 Seamless Yeeb Nkab Khoom Lag Luam
Stainless yeeb 22 hli 316 S31600 YEEB SCH 40

Stainless hlau yog ib qho alloy ntawm cov hlau uas tiv taus xeb. Nws muaj tsawg kawg yog 11% chromium thiab tej zaum yuav muaj cov ntsiab lus xws li carbon, lwm yam tsis yog lwm yam kom tau lwm yam uas xav tau. Stainless hlau qhov tsis kam rau corrosion tau los ntawm cov chromium, uas ua cov yeeb yaj kiab passive uas tuaj yeem tiv thaiv cov khoom thiab kho tus kheej nyob rau hauv lub xub ntiag ntawm oxygen.