Teeb 1: Cov hauv paus ntawm Kub Muag Q235B, S235JR & S355JR Angle Steel
Lus nug: Cov Qauv Q235b, S235JR, thiab S355JR Angleats ua raws, feem?
Teb: Q235B Adheres rau Tuam Tshoj GB / T 700-} S235JR Ua raws li European EN EN EN6}}}}}}}}}} 2 tus qauv, thawj cov kev ntsuas cov qauv hauv EU thiab ntau cov kev lag luam thoob ntiaj teb. S3555jr kuj tseem muaj kev tswj hwm los ntawm EN 10025-2, tsim los ua lub siab-muaj zog tsawg-alloy qauv hlau. Cov qauv no txhais cov tshuaj xyaw tshuaj, cov khoom siv neeg kho tshuab, thiab ua tau zoo kom paub tseeb. Ua raws li cov qauv no yog qhov tseem ceeb rau lawv cov koob meej, raws li lawv ntsib kev tsim kho thoob ntiaj teb thiab kev tsim khoom lag luam.
Lus nug: Cov kev tsim qauv "Q235b", "S235JR", thiab "S355jr" qhia txog txhua tus steel qub?
Teb: "Q235b" txhais tau tias "Q" (tawm los dag zog) nrog rau 235MPA yam tsawg kawg zog, thiab "B" Denotes cuam tshuam kev sib tw ntawm 20 degree. "S235JR" sawv ntsug rau "S" (muaj zog) nrog 235mpa kom muaj zog, "J" (cuam tshuam ntawm 20 degree), thiab "R" (zoo tib yam). "S3555jr" Qhia txog 355MPA tsawg kawg zog zog, "J" (20 (20℃cuam tshuam xeem), thiab "R" (zoo tib yam). Cov lej lej muaj kev cuam tshuam tawm lub zog sib txawv, thaum cov tsiaj ntawv qhia meej thiab qib kawm zoo. Cov kev tsim qauv no pab cov neeg yuav khoom sai sai phim cov hlau mus rau phiaj xwm.
Lus nug: Yog cov tawv tawv muaj nyob hauv cov ceg tsim sib luag thiab tsis sib xws, thiab vim li cas thiaj tseem ceeb?
Teb: Yog, Q235B, thiab s235jr, thiab S355JR Angleats yog tsim nyob rau hauv ob qho kev sib npaug thiab tsis sib xws. Sib npaug sib npaug (piv txwv li, 50 × 5 hli) muab cov kabmob symmetric {}} cov kabmob, zoo tagnrho rau kev sib tw sib tw thiab tes. Cov ceg tsis sib xws (piv txwv li, 40 × 63 × 5mm) muab cov ru tsev ua kom sov, nqaj- daim ntawv sib txuas, lossis cov tshuab sab nrauv nrog kev ntxhov siab tsis sib luag. Kev muab cov qauv tsim no ua rau lawv ntau yam rau cov haujlwm sib txawv - ntawm kev tsim kho nyob rau kev lag luam hnyav. Qhov kev hloov pauv no yog qhov tseem ceeb rau lawv kub {{{}} muag xwm txheej, raws li lawv cere rau ntau tus neeg yuav khoom siv.
Lus nug: Cov txheej txheem ntau lawm siv rau cov kub no {{0} Nyem nws cuam tshuam zoo li cas?
Teb: Tag nrho peb yog tsim tawm ntawm kub dov - cov hlau billets yog rhuab rau cov mills los ua lub kaum sab xis. Kub Rolling Cais cov qauv lis, txhim kho kev ductility thiab kev nruj me ntsis tseem ceeb rau kev siv. Nws tso cai kom meej tswj ntawm ceg ntev thiab cov tuab yaj ntaub, ua kom muaj kev sib xws thoob plaws. Cov txheej txheem yog tus nqi -} Pib ua tau zoo rau huab hwm coj ntau lawm, ua kom tus nqi tau sib tw- ib qho kev sib tw hauv lawv cov koob meej. Kub Rolling kuj tau tsim ib lub qhov chaw ruaj khov uas yog vuam muag (vuam, khoov, khoov) zoo, ua rau lawv yooj yim mus ua haujlwm nrog rau cov neeg cog lus.
Lus nugYog vim li cas Q235b, S235JR, thiab S355jr ntawm cov kub tshaj plaws {{check} Muag kaum sab xis tawv?
Teb: Their popularity stems from balanced performance and affordability-Q235B and S235JR are cost-effective for general use, while S355JR offers higher strength for heavy loads. Lawv muaj kev zoo heev weldability thiab formability, txo cov nqi fabrication. Ua raws li cov qauv thoob ntiaj teb (GB, en) ua rau lawv nkag tau hauv ntau yam kev lag luam. Lawv cov virtility suts cov phiaj xwm los ntawm cov vaj tse nyob rau kev lag luam tshuab, thov rau cov neeg siv khoom dav dav. Ib qho ntxiv, cov kab ntau lawm cov kab ua kom tau cov khoom ruaj khov thiab zoo ib yam, lub tsev yuav khoom ntseeg. Cov xwm txheej no ua ke los tsav siab.
Teeb 2: Cov Khoom Siv Cov Neeg Kho Tshuab Piv
Lus nug: Yuav ua li cas cov txiaj ntsig thiab tensile zog ntawm Q235b, S235JR, thiab S355JR Angle txawv txawv?
Teb: Q235B muaj qhov tsawg kawg nkaus lub zog muaj zog ntawm 235MPA thiab tensile lub zog ntawm 375- 500Mpa. S235JR sib tw Q235B ze: 235mpa tawm los thiab 360- 510mpa tensile lub zog. S355jr muaj ntau dua cov txiaj ntsig tau ntau dua (3555mpa) thiab tensile (470 {176MPA) muaj zog. Cov kev sib txawv no lub hom phiaj sib txawv-Q235B / S235JR rau lub teeb-rau-nruab nrab (piv txwv li cov thav duab hauv av (piv txwv li, choj gobs). Lub Zog Gap tso cai rau cov neeg yuav xaiv kom xaiv cov khoom muaj txiaj ntsig zoo: Xaiv cov khoom qis rau kev txuag nyiaj lossis muaj zog dua rau kev ua kom ntev.
Lus nug: Qhov kev cuam tshuam nyuaj nyuaj yuav tsum muaj rau peb lub kaum sab xis no, thiab vim li cas nws muaj teeb meem?
Teb: Q235B yuav tsum muaj ntau dua lossis sib npaug ntawm 27 h cuam tshuam lub zog ntawm 20 degree. S235JR xav tau ntau dua lossis sib npaug ntawm 27 yam ntawm 20℃(lossis 0℃rau qee cov neeg sib koom ua ke). S3555jr ua tau ntau dua lossis sib npaug rau 27J ntawm 20 degree. Kev Cuam Tshuam Cov Khaub Ncaws Brightness Davge BRACTION BURFEADS SALDS (piv txwv li, Cua Cua, Machinery Kev Cuam Tshuam). Rau cold- cheeb tsam cov phiaj xwm, cov khoom sib cais xws li Q235d lossis S355Jo (cov qhab nia kub thiab cov qauv uas feem ntau yog ib puag ncig uas feem ntau yog ib puag ncig uas feem ntau. Cov tawv muaj zog ua kom muaj kev nyab xeeb ua kom muaj kev nyab xeeb, ua cov xim kaum sab xis txhim khu kev qha rau cov ntawv thov tseem ceeb.
Lus nug: Cov tshuaj lom neeg muaj pes tsawg leeg ntawm cov tawv nqaij lub kaum ntse ntse cuam tshuam lawv cov kev ua tau zoo?
Teb: Q235B thiab S235JR yog cov tawv carbon cov hlau nrog tsawg dua lossis muaj sib npaug rau 0.22% cardability (}} 1.60 manganese (txhawb nqa lub zog). S3555jr Ntxiv cov khoom me me (Niobium, Vanadium, thaum ua kom lub zog qis (tsawg dua lossis sib npaug rau Weldability. Phosphorus thiab leej faj yog txwv rau tsawg dua los yog sib npaug rau 0.045% hauv tag nrho peb los tiv thaiv brittleness. Kev tswj cov zog ua kom muaj txiaj ntsig zoo-Q235B / S235JR tshuav nqi thiab siv tau, thaum S355jr nce lub zog yam tsis muaj lub zog uas tau txi. Qhov kev sib xyaw no tswj tau yog qhov tseem ceeb rau cov qauv sib ntsib sib tham thiab cov kev cia siab rau cov kev cia siab.
Lus nug: Qhov twg ntawm lub kaum sab xis no muaj qhov zoo tshaj plaws muaj, thiab yuav ua li cas qhov ntawd tau txais txiaj ntsig?
Teb: Q235B thiab S235JR muaj me ntsis zoo dua formability (elongation ntau dua los yog sib npaug rau ntawm 21%), vim lawv lub zog qis dua thiab cov pa roj carbon ntau. Lawv khoov tau yooj yim yam tsis muaj kev tawg, haum rau kev cai duab zoo li nkhaus tes los yog cov ncej caj ces. S3555jr Tseem muaj cov qauv zoo rau nws lub zog ua tau zoo, tuav feem ntau ntawm cov khoom khoov thiab dov cov kev xav tau. Tag nrho peb leeg tuaj yeem txiav, drilling, thiab welded nrog cov khoom txheem {{}}} Tsis muaj cov cuab yeej tshwj xeeb. Qhov no yooj yim ntawm cov ntaub pua chaw rau lub sijhawm ua haujlwm, ua rau cov tawv nqaij tawv, ua rau cov hlau nplaum ntau dua rau cov dej num nruj.
Lus nug: Yuav ua li cas cov kaum ntse ntse ua nyob rau hauv high - tej kev mob?
Teb: Txhua peb lub siab ua kom muaj zog ntawm cov huab cua kub, tab sis kev ua tau zoo tsawg dua 300 degree. Q235B thiab S235JR khaws cia ~ 70% ntawm lawv cov txiaj ntsig lub zog ntawm 400 degree, thaum s degree, thaum s355jr khaws ~ 65% vim nws cov ntsiab lus alloy. Tsis muaj leej twg pom zoo rau kev siv tas mus li 425 degree, raws li lub zog poob qis. Txog thaum luv -} Lub hom cua sov raug (piv txwv li, lawv tau rov qab cov khoom noj ib zaug txias, tsuav yog ntev li txias yog tswj hwm. Nyob rau hauv cov xwm txheej hluav taws kub, lawv xav tau fireproofing (piv txwv li, intumbescescescescent cov xim) kom tswj hwm cov qauv txheej txheem. Lawv lub siab {{{}}} kev ua tau zoo yog txaus rau feem ntau tsis yog rau feem ntau tsis-}}}}}} kev siv cov ntaub ntawv.
Teeb 3: Daim Ntawv Thov Kev Xaiv Tsa los ntawm qib
Lus nug: Dab tsi yog cov ntawv thov ntawm Q235B lub kaum sab xis steel, thiab vim li cas nws thiaj haum rau lawv?
Teb: Q235B yog siv dav hauv Suav teb kev tsim kho rau lub ru tsev {} {}}}} nruab nrab load xav tau. Nws ua cov khoom siv ua liaj ua teb (cog lus cog qoob loo, cov tsheb laij teb cov tsheb) vim muaj kev pheej hmoo thiab muaj peev xwm. Nws yog siv rau kev cia racks, shelving, thiab pob zeb ua tiav cov ntaub ntawv txhawb nqa. Nyob rau hauv me me- nplai kev tsim khoom, nws tsim cov tshuab thav ntawv thiab kev txua khoom. Nws ua raws li GB / T 700 ua rau nws mus -}}}}} {}} nco ntsoov cov neeg yuav khoom. Nws Weldability tseem ua kom yooj yim rau -}} chaw ua ke rau cov cog lus.
Lus nug: Thaum yog S235JR lub kaum sab xis steel qhov kev xaiv uas nyiam, thiab ua dab tsi kev lag luam cia siab rau nws?
Teb: S235jr yog qhov xav tau nyob hauv European thiab ntiaj teb cov phiaj xwm yuav tsum tau siv 10025 {}}}}} 2 ua raws cai, xws li kev lag luam thav ntawv thiab cov qauv vaj tse. Nws yog siv rau kev tiv thaiv loj thiab kev tsheb nqaj hlau bracing, qhov twg nws cov tawv tiv thaiv cuam tshuam. Kev lag luam automotive siv nws rau trailer ntas thiab tsis - tseem ceeb chassis qhov chaw. Nws yog ib txwm muaj nyob rau hauv DIY thiab architectural tej yaam num (cov tsheb ciav hlau, zoo nkauj ntsiab) vim yooj yim fabrication. Export -} Kev Tsim Tshuaj Ntsuam Xyuas Cov Khoom Lag Luam S235JR rau nws cov qauv hauv ntiaj teb, raws li nws tau raws cov qauv hauv ntiaj teb. Nws qhov sib npaug ntawm lub zog thiab tus nqi ua nws versatile rau kev siv hla kev lag luam.
Lus nug: Dab tsi hnyav {{{{0} Lub Luag Haujlwm Thov Hu rau S355JR Angle Steel, thiab dab tsi zoo nws puas kam?
Teb: S3555jr yog siv rau qhov siab {{1} Cia li nce lub zog txhawb nqa cov khoom hnyav. Nws tsim crane booms thiab gantry crane qauv, raws li nws cov nkees ua hauj lwm kho cov khoom siv dynamic. Nws yog qhov zoo tagnrho rau cov khoom siv tsuas (conveyor txhawb nqa, crusher thaves) thiab offshore platform Cheebtsam (nrog kev tiv thaiv xeb). Muaj cov khoom siv Machinery cia rau nws kom nruj thiab ruaj khov. Piv rau Q235B / S235JR, S355jr
Lus nug: Yuav cov tawv tawv tawv siv sib hloov, thiab cov xwm txheej dab tsi txiav txim pauv hloov chaw?
Teb: Kev hloov pauv tau nyob ntawm qhov yuav tsum tau ua. Q235B thiab S235JR yog ze li ntawm cov khoom siv tshuab, yog li lawv tuaj yeem hloov rau txhua lwm yam hauv tsis {}}} nruab nrab load tej yaam num. S3555jr tsis tuaj yeem hloov Q235B / S235JR Yog tias tus nqi yog qhov tseem ceeb, tab sis nws tuaj yeem hloov lawv rau cov khoom ntim hnyav (nrog cov khoom txuag khoom). Conversely, Q235B / S235JR yuav tsum tsis txhob hloov S355jr hauv hnyav- thauj khoom siv, raws li lawv tsis muaj peev xwm txaus. Cov qauv kuj tseem ceeb - EU cov phiaj xwm yuav xav tau S235jr / S355jr, Thaum Suav cov phiaj xwm yuam Q235b. Cov kws ua choj yuav tsum pom zoo hloov chaw rau cov kev coj nyab xeeb thiab kev ua raws cai.
Lus nug: Muaj dab tsi tiv thaiv corrosion yog xav tau rau cov xim tawv kib hauv cov ntawv thov sab nraum zoov?
Teb: Tag nrho peb yog raug rau cov xeb tawm sab nraud, yog li kev tiv thaiv yog qhov tseem ceeb. Kub {- dip galvanizing yog qhov ua tau zoo tshaj plaws 20 {{{{{{{}}}}}}} 15 xyoo hauv cov ntug hiav txwv). Kev tha xim nrog anti {{- av primer thiab acrylic topcoat yog tus nqi {15} maj mam rau ib puag ncig me me. Rau cov tubrog nkoj lossis thaj chaw muaj cov txheej txheem duplex (galvanizing + epoxy txheej) tiv taus ntsev thiab kuab paug. Zinc-nplua nuj pleev xim kov cov tsiaj ntawv lossis thaj chaw puas. Q235B / S235JR yuav xav tau cov txheej txheej tuab dua S355jR nyob rau hauv ib puag ncig hnyav, raws li lawv tsis muaj alloy-based corrosion. Kev tiv thaiv kom zoo txuas lub neej thiab khaws cov qauv txheej txheem kev ntseeg siab.
Teeb 4: Kev Tsim & Tswjhwm Zoo
Lus nug: Cov kauj ruam dab tsi thaum lub sij hawm tsim khoom los xyuas kom zoo ib yam li cov khoom siv kub kub {{chinese} muag lub steels?
Teb: Ntau lawm pib nrog siab - Cov khoom lag luam bille- Cov chaw muag khoom lag luam kom tau cov khoom siv rau cov tshuaj lom neeg. Rov ua kom sov dua yog tswj hwm (1100 - 1250 degree) kom zam dhau / underheheing. Rolling mills siv CNC tswj kom kho tau ob ceg ntev thiab cov tuab, ua kom muaj txiaj ntsig zoo rau cov qauv. Tom qab dov, lub kaum sab xis txias maj mam txias rau saum txaj kom tiv thaiv cov kev ntxhov siab uas muaj kev ntxhov siab. Daightening machine kho cov hneev, thiab txiav cov kab ua kom muaj qhov ntev ntev. Txhua lub batch undergoes piv txwv rau kev ntsuas tshuab thiab tshuaj chemical. Cov kauj ruam no ua kom txhua daim ua tau zoo txheej txheem, tseem ceeb rau kev tswj hwm kub-muag xwm txheej.
Lus nug: Cov kev ntsuam xyuas zoo li cas ntawm Q235b, S235JR, thiab S355JR lub kaum ntse ntse steels ua ntej cov zaub mov xa tuaj?
Teb: Tensile cov ntawv sim ntsuas tawm los / tensile lub zog thiab elongation los tshawb xyuas cov khoom ntiag tug. Kev Ntsuas Cov Kev Ntsuas (Charpy V- Itch) Kos Tochness Ntawm Cov Kev Kub (20 Qib rau tag nrho peb). Tshuaj lom neeg tshuaj ntsuam xyuas (ntawm spectrometry) lees paub qib theem ua tau raws cov qauv. Kev tshuaj ntsuam sab hauv siv calipers thiab kev ntsuas ko taw los kuaj xyuas ntev, tuab, thiab ncaj. Nto kev soj ntsuam xyuas qhov tsis xws li cov kab nrib pleb, pits, lossis nplai. Daim ntawv pov thawj ntaub ntawv ntsuas (MTC) yog muab rau txhua pob ntawv kuaj. Qee cov tuam ntxhab muab thib peb {{{{{{{{{{{}} kev soj ntsuam (piv txwv li, sgs) rau export xaj kom tsim cov neeg yuav khoom ntseeg.
Lus nug: Yuav ua li cas thiaj tsim khoom kom ua kom tau cov khoom sib npaug ntawm cov tawv tawv tawv?
Teb: Cov tuam ntxhab siv precision - tshuab xaws yob yob cov tawv nqaij loj (sib npaug / sib luag). CNC lub tshuab soj ntsuam thiab kho yob ceev, siab, tswj kom muaj kev zam sab, tswj kom ntev, ± 0,.1mm rau thickness). Tshaj tawm - rolling, cov cav txiav txim siab scan cov ces kaum sib txawv. Txoj kab ncaj yog kom muaj zog ntawm cov menyuam ua kom ncaj nrog cov khoom siv tau yooj yim, lim cuam tshuam rau tsawg dua lossis sib npaug rau 3 hli / m. Kev ntsuas tsis tu ncua ntawm cov yob thiab ntsuas cov khoom (txhua hli) muaj peev xwm sib xws. Tej yam tsis -} Txoj kev raws li tsis lees txais lossis rov ua dua tshiab, kom cov neeg yuav khoom tau txais cov ces kaum uas haum cov qauv tshwj xeeb.
Lus nug: Dab tsi ntsuas los tiv thaiv kev tsis taus nto nyob hauv cov tawv tawv tawv?
Teb: Billts tau kuaj xyuas thiab ntxuav kom tshem tawm cov nplai lossis xeb ua ntej rov ua dua, tiv thaiv kev ua tsis tiav. Rolling mills siv lubricants kom txo kev sib txhuam ntawm cov qwj thiab hlau, zom zom. Kev tswj cov cua txias tiv thaiv kev ua haujlwm thermal rau saum npoo. Tom qab dov, txhaj koob tshuaj tiv thaiv tuaj yeem siv los tshem tawm cov nplai seem, tawm ntawm qhov chaw huv. Kev kuaj pom kev kuaj xyuas (phau ntawv lossis automated) kuaj xyuas cov kab nrib pleb, pits) {}} dispive plic yog pov tseg. Qee cov tuam ntxhab foob cov roj txheej me me kom tsis txhob muaj xeb thaum lub sijhawm khaws khoom thiab kev thauj mus los. Cov kauj ruam no ua kom lub kaum sab xis ua kom muaj qhov siab -} zoo sab haum rau kev sib txuas tam sim ntawd.
Lus nug: Cov txheej txheem ntau npaum li cas cov hmoov txhuas sib piv rau Q235b, S235JR, thiab S355JR Angle?
Teb: Cov thawj zaug ua tau zoo sib xws rau qhov ntau thiab tsawg rau cov qauv (6M / 9M / 12m), feem ntau 3 {}}}} Cov khoom muag khoom. Rau cov xaj loj (ntau dua 50 tons) lossis kev coj noj coj ua, cov hmoov txhuas txuas ntxiv rau 7-15 hnub ua haujlwm. Q235B tej zaum muaj cov khoom lag luam luv luv ua rau kev lag luam Suav vim muaj kev tsim khoom hauv nroog Thaum lub sij hawm Peak Cov Caij Tsim Kho (caij nplooj ntoos hlav / lub caij ntuj sov), txhuas lub sijhawm yuav nce ntxiv los ntawm 2-3 hnub. Cov tuam txhab tsim khoom lag luam ua ntej kev tswj cov khoom lag luam siab dua, ua kom sai dua li cov neeg tshwj xeeb. Qhov kev txhawb nqa sai tau txhawb lawv cov nrov ntawm cov neeg yuav khoom nrog cov sijhawm ua haujlwm nruj.
Teeb 5: Kev Txawj Ua Ntej & Cov Lus Qhia Ua Tswv Yim
Lus nug: Dab tsi yuav tsum tau xav txog thaum xaiv ntawm Q235b, S235JR, thiab S355JR Angle?
Teb: Ua ntej, phim cov qib kom load cov cai yuav tsum tau {}}}} nruab nrab loads, s355jr rau cov khoom hnyav. Txheeb xyuas cov phiaj xwm phiaj xwm: Cov haujlwm Suav yuav xav tau Q235B, EU / Cov Haujlwm Thoob Ntiaj Teb S235jr / S355JR. TSHOOJ HAUV COV NQI - Q235B / S235JR yog pheej yig dua S355JR, yog li xaiv lub zog siab dua yog tias xav tau. Txiav txim siab li fabrication xav tau: Q235B / S235JR tau yooj yim me ntsis rau khoov, thaum s355jr foob rau cov qauv txheem. Ntsuas cov kev mob ib puag ncig - Txhua yam xav tau kev tiv thaiv kev sab nraum zoov, tab sis S355jr cov ntsiab lus muaj cov ntsiab lus tsis kam me. Tham cov txheej txheem kws ua txuj ci ua kom ntseeg tau tias cov qib ua tau raws kev nyab xeeb thiab cov cai yuav tsum tau ua.
Lus nug: Dab tsi ntim thiab kev xaiv thauj khoom muaj rau cov kub {{0}. Muag lub kaum ntse ntse ntse?
Teb: Lub kaum ntse ntse yog pob nrog steel straps (2 {{{}} 4 straps ib pob khoom) kom tiv thaiv kev hloov pauv. Qhov ntau me me (tsawg dua los yog sib npaug rau 50 × 50mm) yog bundled hauv 500-1000kg pob; loj dua nyob rau hauv 1000-2000kg pob. Ntoo pallets lossis blocks pad hauv qab ntawm bundles kom tsis txhob muaj kev puas tsuaj. Kev xa khoom thauj khoom hauv tsev; Kev xa khoom thoob ntiaj teb siv cov khoom thauj khoom thauj (ntim rau cov tsiaj me me, ntau rau cov xaj loj). Waterproof Tarpaulins npog bundles rau kev cia sab nraum zoov thaum pib. Cov neeg xa khoom muab cov kev cai ntim khoom (piv txwv li, yas qhwv) rau corrosion-rhiab xaj. Cov ntaub ntawv thauj khoom muaj xws li MTC, cov npe ntim, thiab daim ntawv pov thawj ntawm keeb kwm (rau kev xa tawm) los pab txhawb kev lis kev cai tshem tawm.
Lus nug: Yuav ua li cas khaws cov kaum sab xis nruj ua kom tiv thaiv kev puas tsuaj thiab xeb?
Teb: Muab cia rau hauv ib qho qhuav, zoo - vent vent vententilated warehouse kom tsis txhob ya raws. Tshooj cov pob ntawm ntoo racks (15 - 30cm saum av 30cm saum av) kom tiv thaiv kev sib cuag nrog cov av ntub dej. Cov qhab nia cais thiab ntau thiab tsawg nrog cov ntawv lo kom tsis txhob sib xyaw. Npog nrog waterproof tarpaulins yog muab khaws cia sab nraum zoov, thiab siv desiccants hauv kev cia. Zam kev cuam tshuam ntau dhau (max 2- 3 meters) kom tiv thaiv dabtsi yog khoov. Rau ntev {- sij hawm cia (ntau dua 3 lub hlis), thov los tiv thaiv xeb roj thiab kuaj xyuas txhua hli-xeb thiab cov roj packly. Khaws thaj chaw kom huv kom tiv thaiv cov hmoov av thiab cov khib nyiab tsim, uas tuaj yeem tsim ya raws thiab ua rau xeb.
