Teeb 1
Q: Dab tsi yog qhov sib txawv ntawm S235 thiab S355 qauv txheej txheem hlau?
A: S235 thiab S355 sib txawv feem ntau nyob rau hauv cov qoob loo muaj zog} s235 MPa, thaum S355 nce 35 MPA. Qhov no ua rau S355 ntau tsim nyog rau hnyav {{9} log teeb zoo li cov tsev lag luam lossis cov choj. S235 feem ntau siv hauv cov ntawv thov sib dua xws li kev ua raws li thaj chaw lossis tsis muaj me me {12} ntsuas kev txhawb nqa. Ib qho ntxiv, S355 tej zaum yuav muaj kev nyab xeeb me me me me me me me me thiab ob qho tib si yog ob qho tib si yog siv dav hauv cov txheej txheem kev nyab xeeb. Qhov kev xaiv ntawm lawv feem ntau yog nyob ntawm cov kev yuav tsum tau load cov kev cai thiab cov qauv tsim qauv.
Q: Cov txheej txheem BS thiab BS tus qauv sib xws rau kuv {{{} Daim duab hlau ntu?
A: ASTM thiab BS cov qauv muaj qee qhov sib tshooj tab sis tsis sib haum. Piv txwv li, Astm A36 zoo ib yam li BS 4360 qib 43A / B, tab sis lawv cov khoom siv tshuaj lom neeg thiab cov khoom siv txhua yam sib txawv me ntsis. Thaum siv steel tshooj los ntawm cov qauv sib txawv, koj yuav tsum tau txheeb xyuas yog tias cov tsis muaj zog, lub zog tenseense, thiab qhov tseeb ua tau raws li koj cov phiaj xwm. Qee cov tuam ntxhab tsim dual - Cov khoom lag luam uas ua raws cov qauv uas ua tau zoo nrog cov qauv no, uas tuaj yeem ua kom yooj yim sourcing. Nws tseem yog qhov tseem ceeb kom kuaj xyuas yog tias koj lub tsev tsim lub tsev tau txais cov qauv los zam kev ua raws cov teeb meem. Kev mus sab laj ib tug kws ua lag luam raug pom zoo kom paub tseeb tias kev sib raug zoo.
Q: Daim ntawv thov raug yog dab tsi ntawm q235b h - Beams?
A: Q235B h - Beams tau siv dav hauv ntau yam haujlwm ua vim lawv qhov kev ua tau zoo. Lawv feem ntau siv nyob rau hauv kev tsim kho cov vaj tse ua vaj tsev, uas lawv ua haujlwm raws li cov tsiaj loj thiab cov kab ntawv kom ris lub ru tsev thiab khoom siv. Hauv cov tsev lag luam zoo li khw khw lossis chaw haujlwm yees, Q235B h} daim kab teeb feem ntau siv hauv cov pem teb thiab cov hlau nplaum. Lawv kuj pom cov ntawv thov hauv kev tsim kho choj, tshwj xeeb tshaj yog rau kev tsim me me rau nruab nrab- span kev tsim khoom ntawm cov cuab yeej siv tshuab cov khoom siv hauv paus thiab kev txhawb nqa. Ib qho ntxiv, Q235B h - Beams tau siv nyob rau hauv cov qauv qauv xws li kev tsim kho kev tsim kho thiab ua haujlwm rau lawv cov kev ua tiav yooj yim thiab kev teeb tsa.
Q: Cov ntsiab lus carbon cuam tshuam li cas rau kev ua tau zoo ntawm cov pa roj carbon hlau i {}} Beams?
A: Cov ntsiab lus carbon muaj qhov cuam tshuam tseem ceeb ntawm kev ua yeeb yam ntawm carbon hlau i - ci. Cov ntsiab lus carbon ntau dua ua rau muaj zog thiab hardness ntawm cov hlau, ua rau kuv {ge} Beams ntau tiv taus rau deformation nyob rau hauv cov nra hnyav. Txawm li cas los xij, nws tseem yuav txo qis weldability {}} high - pa roj carding thiab yuav tsum tau kho kom sov. Txo cov ntsiab lus txo cov ntsiab lus (zoo li hauv cov hlau me me) txhim kho kev sib txuas thiab tawv tawv kom nqus tau ntau lub zog, uas yog qhov tseem ceeb rau av qeeg Nws tseem ua tau zoo dua li ntawm kev siv lub nqaj yooj yim txiav, tho, thiab cov duab. Cov pa roj carbon cov ntsiab lus feem ntau yog kho raws li daim ntawv thov: siab}}} {14} {13} {{14} - Cov pa roj carbon rau cov ntawv thov uas xav tau Weldability thiab ductility.
Q: Kuv yuav tsum txiav txim siab li cas thaum xaiv tau q195 thiab Q215 steel ci?
A: Thaum xaiv tau ntawm Q195 thiab Q215 Hlau Beams, Pib nrog Kev Ntsuas Lub Zog (215 MPa} MPa MPA rau Q195), yog li nws zoo dua rau me ntsis hnyav dua ntais. Tom ntej no, xav txog daim ntawv thov ib puag ncig: yog tias cov qauv yog nthuav tawm cov ntsiab lus me me lossis xav tau cov ntsiab lus muaj zog zoo dua li nws tau ua tiav zoo dua. Q215 muaj kev sib npaug ntawm lub zog thiab formability, ua rau nws versatile rau General {12} Pead {{13} bearing partitions. Tsis tas li, xyuas tus nqi-} Q195 feem ntau muaj kev lag luam ntau dua rau tsawg- Thov cov phiaj xwm. Thaum kawg, xyuas cov qib xaiv ua raws li koj cov phiaj xwm tsim qauv thiab cov khoom siv.
Teeb 2
Q: Dab tsi yog qhov kom zoo dua ntawm h - ci rau Kuv -} daim duab steel tshaj?
A: h - Beams muaj ob peb qhov zoo dua ib txwm muaj kuv- daim duab ntu. Lawv cov ntoo khaub lig {{}} seem cov duab muab cov lus qhia zoo dua hauv ob qho kab rov tav thiab cov lus qhia ntsug, ua rau lawv muaj txiaj ntsig ntau ntawm qhov hnyav. H - Beams muaj qhov chaw dav dav, uas nce lawv qhov ruaj khov tom qab thiab txo qhov xav tau kev txhawb nqa ntxiv. Lawv tseem muab cov tshuaj tiv thaiv zoo dua, uas yog qhov tseem ceeb rau cov qauv yuav raug rau cov rog sib ntswg. Nyob rau hauv cov nqe lus ntawm kev teeb tsa, h {{{9} kab teeb yog yooj yim dua rau txuas nrog rau lwm cov khoom lag luam zoo li txhua tus qauv thiab kev braces vim lawv lub tiaj flanges. Ib qho ntxiv, h - kab teeb tau ntau dua tus nqi-}}} Zoo siv tau ntau yam vim tias lawv siv cov khoom siv hnyav dua, txo cov nqi.
Q: Ua S275 Txheej Txheem Hlau Beams ntsib ASTM cov qauv?
A: S275 yog European Txuj Ci (En 10025) Qib Qauv Steel, thiab nws tsis ncaj qha rau ib astm tus qauv, tab sis nws muaj sib npaug. Piv txwv li, S275 yog zoo ib yam li AQUM A572 Qib 50 piv txwv li lub zog (s275 mpa}}}}} Txawm li cas los xij, ntau lub chaw tsim khoom tuaj yeem tsim S275 teeb uas tau raws qee cov kev xav tau ntawm cov khoom siv tshuab astm rau cov neeg kho tshuab yog hais tias teev tseg. Nws yog ib qho tseem ceeb uas yuav tsum tau xyuas cov ntawv pov thawj tsim kom paub meej tias cov qauv uas cov khoom lag luam ua raws li cov khoom. Yog tias koj qhov project yuav tsum tau xaiv cov lus hais rau Astm, koj yuav tsum xaiv ib qho kev hloov pauv, tab sis S275 tuaj yeem yog cov khoom tshwj xeeb yog tias nws cov khoom haum nrog koj cov kev xav tau. Yuav tsum txheeb xyuas cov ntaub ntawv cov khoom siv los ua kom ua raws li kev ua raws li.
Q: Lub peev xwm loj tshaj plaws muaj peev xwm thauj tau nyiaj ntau npaum li cas ntawm hea1000 h- Beams?
A: Qhov ntau tshaj plaws load muaj peev xwm ntawm hea1000 h- Beams nyob ntawm ntau yam, yog li tsis muaj tus lej xov tooj. Cov ntsiab lus tseem ceeb suav nrog cov nqaj ntawm lub nqaj {{}} ntev dua cov roj muaj ntau vim muaj ntau lub sijhawm khoov. Cov kev txhawb nqa (tsau, lossis cantilevered) kuj ua lub luag haujlwm: Cov kev txhawb nqa tsau tuaj yeem nqa ntau dua cov khoom plig. Ib qho ntxiv, hom kev thauj khoom (sib xyaw ua ke, taw tes, lossis kev sib zog) cuam tshuam nrog cov khoom muaj zog uas yuav tsum tau txav cov khoom siv yuav tsum muaj kev nyab xeeb dua. Cov khoom siv cov ntaub ntawv yog lwm qhov kev txiav txim siab; Hease1000 teeb ua los ntawm S355 yuav muaj lub peev xwm siab dua cov uas tau ua los ntawm S235. Txhawm rau kom tau txais tus nqi raug, koj yuav tsum xam nws siv cov qauv txheej txheem engineering lossis software, xav txog txhua yam hloov kho no. Cov kab kos duab muaj peev xwm kuj tuaj yeem muab cov kab ntawv muaj peev xwm thauj khoom raws li cov kev teeb tsa thiab txhawb nqa.
Q: Vim li cas yog Q345b kev xaiv nrov rau cov haujlwm kev ua yeeb yam?
A: Q345B yog nrov rau cov haujlwm txheej txheem vim tias nws zoo ua ke muaj zog thiab tawv. Nrog rau cov txiaj ntsig lub zog ntawm 345 MPa, nws tuaj yeem nqa cov khoom loj dua li Q235b,}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}} Rose vaj tse, thiab cov choj, thiab Hnyav. Nws muaj qhov zoo weldability, uas yog qhov tseem ceeb rau kev sib sau ua ke steel thav duab, thiab tsis tas yuav ua ntej preheating thaum lub sij hawm vuam, txuag lub sijhawm thiab cov nqi zog. Q345B tseem muaj qhov qis qis - kub shadness ("B" qhia tias nws tau ua rau muaj kev sib cuam tshuam ntawm 20 degree), ua rau nws siv nyob rau hauv cov cheeb tsam txias. Ib qho ntxiv, nws tau dav muaj los ntawm cov tuam ntxhab, ua kom tau cov khoom siv ruaj khov thiab sib tw nqi. Nws cov versatility hla ntau yam project ua rau nws muaj koob meej.
Q: Yuav kuaj cov carbon hlau i - kab teeb ntawm kev xa khoom?
A: Txheeb xyuas cov pa roj carbon hlau i {} Beams ntawm kev tawg, xeb, kos, lossis tsis sib xws, uas yuav qhia tau tsis zoo tsim lossis chaw khaws khoom tsis zoo lossis chaw khaws khoom tsis zoo lossis khaws cia. Tom ntej no, txheeb xyuas qhov ntev (flange dav, web thickness, tag nrho cov kab xev ntsuas lossis caliper los xyuas kom lawv phim cov ntaub ntawv xaj. Txheeb xyuas cov ntaub ntawv pov thawj (MTC) muab los ntawm cov chaw tsim tshuaj paus, uas yuav tsum muaj lub zog tshuaj, kom muaj zog (ordm, bs, thiab lwm yam). For critical projects, you can take samples for third-party testing to confirm the properties. Tsis tas li, kos cov ncaj ntawm lub teeb ci ntsa iab- tus txiv ntoo tseem ceeb yuav cuam tshuam rau kev teeb tsa thiab kev tsim qauv. Thaum kawg, xyuas kom meej tias ntim yog lawm kom tiv thaiv kev puas tsuaj thaum thauj mus los.
Teeb 3
Q: Dab tsi yog qhov sib txawv ntawm h - nqaj thiab kuv {{ci rau qhov hnyav?
A: h {- Beams thiab kuv {leads} Beams sib txawv ntawm qhov hnyav vim lawv tus ntoo khaub lig} kev teeb tsa. H {{4 4 Beams} Beams feem ntau muaj dav, thicker flanges thiab tuab} Beams ntawm tib qhov siab, uas ua rau lawv hnyav dua. Qhov hnyav ntxiv no ua rau lawv cov load ntau dua {{}} cov kabmob muaj peev xwm. Txawm li cas los xij, qhov teeb meem sib txawv sib txawv los ntawm loj - Yuav tsawg, tab sis rau cov qauv loj, tab sis rau cov kab mob loj, tab sis rau cov kab loj, tab sis rau cov nqaj loj tuaj yeem ua rau hnyav dua. Qhov hnyav txawm nyob ntawm cov khoom siv qib; Ib qho siab - Base K- nqaj (zoo li S355) yuav hnyav dua qhov qib qis (zoo li S235) ntawm tib qhov ntev. Thaum xaiv, koj yuav tsum tau sib npaug phaus nrog cov khoom yuav tsum tau {}}} Cov nqi thauj khoom hnyav tab sis nce kev thauj mus los thiab nce tsheb thauj mus los thiab nce tsheb thauj khoom. Cov tuam txhab uas tsim nyog muab qhov hnyav rau ib nti meter cov ntaub ntawv rau txhua qhov loj me, uas pab ua nqi thiab thauj cov laij.
Q: Tau S355 steel ci yuav siv rau hauv cov qauv sab nraum zoov?
A: Yog, s355 steel ci yuav siv tau rau sab nraum zoov qauv, tab sis xav tau kev tiv thaiv kom tsim nyog. S355 nws tus kheej tau muaj mob corrosion tsis kam, tab sis ntev raug rau noo noo, nag, lossis dej qab ntsev (hauv ntug hiav txwv) tuaj yeem ua rau xeb. Txhawm rau tiv thaiv corrosion, kev ntsuas ntau suav nrog kev thov anti {4} {{} dip lossis electroplating steel variants yog tias muaj. Kev xaiv ntawm kev xaiv nyob ntawm ib puag ncig {{} galvanizing yog ntau ruaj khov rau cov xwm txheej hnyav, thaum cov xim tha xim uas haum rau cov huab cua huab cua. Kev saib xyuas tsis tu ncua, xws li rov qab los yog kuaj xyuas cov txheej txheem rau kev puas tsuaj, kuj tseem yog qhov tseem ceeb kom txuas cov nqaj nqaj. Tsis tas li ntawd, kev tsim qauv tsim kom muaj qhov dej thiab txo cov dej ntxiv ntawm cov nqaj tuaj yeem txo cov kev pheej hmoo corrosion. S355 lub zog siab ua rau nws zoo tagnrho rau sab nraum zoov qauv zoo li choj zoo li choj zoo li canopies, lossis kev tiv thaiv kev tiv thaiv thaum muaj kev tiv thaiv kom raug.
Q: Cov qauv twg yuav tsum Q215 tus kab hlau nqaj ua raws?
A: Q215 Hlau Beams feem ntau ua tau raws li cov qauv hauv tebchaws Suav, feem ntau muaj ntau yam GB / T 700- xyoo 2006 (cov hlau qauv hlau). Tus txheej txheem no qhia cov tshuaj lom neeg, cov neeg kho mob tshuab (tawm lub zog, elongation), thiab muaj qhov tob tob rau Q215 steel. Q215 muab faib ua Q215a thiab Q215B, nrog rau cov kev ntsuam xyuas tom kawg ntawm 20 degree, yog li ua raws li cov ntu tshwj xeeb yog qhov tseem ceeb. Ntxiv rau GB / T 700, lawv kuj yuav tsum tau ua kom tau raws cov qauv hlau txheej txheem sib txuam, xws li GB / T 90263 {{{{{{{{{{{{{ Rau cov phiaj xwm nrog thoob ntiaj teb cov cai, cov kab teeb tsa yuav tsim Q215 yuav tsim Q215 beams uas tau tsim qauv zoo li ASTM A36 lossis BS 4360, tab sis qhov no yuav tsum tau lees tias nrog tus neeg xa khoom. Yuav tsum thov daim ntawv pov thawj kev xeem (MTC) los txheeb xyuas kev ua raws li.
Q: Cov nqaj nqaj loj puas cuam tshuam tus nqi ntawm cov qauv hlau steel?
A: Nqaj loj muaj qhov ncaj qha thiab tseem ceeb rau tus nqi ntawm cov qauv hlau txheej txheem. Cov teeb loj dua (nrog ntau dua qhov siab, Flange dav, lossis Web Thickness) Siv cov khoom siv ntau dua, uas nce lub hauv paus nqi. Ib qho ntxiv, ntu loj dua yog qhov nyuaj rau kev tsim khoom, txheej txheem, thiab kev thauj khoom rau kev txiav cov khoom siv, thiab cov tsheb loj dua, txhua yam uas ntxiv rau tus nqi. Tus nqi rau ib chav phaus phaus (piv txwv li, ib tuj) kuj tseem tuaj yeem nce ntxiv rau ntau qhov loj lossis raug ntau dua vim muaj cov khoom ntim tsawg dua. Conversely, me txheem txheem me me txheem ntau thiab tsawg dua kev lag luam vim tias lawv yog pawg {{produced thiab yooj yim dua. Txawm li cas los xij, siv cov kab teeb tsis pom zoo kom txuag tau tus nqi tuaj yeem ua rau cov teeb meem teeb meem, yog li nws yog ib qho tseem ceeb kom xaiv cov ntawv raug raws cov qauv tsim qauv. Muab piv rau cov lus sau los ntawm ntau tus neeg muag khoom rau qhov muaj peev xwm yuav tsum tau nrhiav tus nqi zoo tshaj plaws.
Q: Dab tsi yog qhov weldability ntawm q195 carbon hlau i - Beams?
A: Q195 carbon steel i {{- cov kab teeb ci weldability, ua rau lawv xaiv tau zoo tshaj plaws rau cov phiaj xwm vuam. Qhov no yog vim Q195 muaj cov ntsiab lus carbon qis (feem ntau ib puag ncig 0.26- 0.12%, uas txo qhov kev pheej hmoo ntawm cov kev phom sij ntawm cov cua sov {}}} cuam tshuam cheeb tsam thaum muaj kev cuam tshuam. Lawv tuaj yeem muab welded siv cov kev sib xws xws li cov hlau vuam (smaw), thiab flux hlau (FCAW) tsis tas yuav muaj kev xav tau, txawm tias yog cov tuab tuab. Welded pob qij txha tswj lub zog zoo thiab ductility, kom ntseeg tau tus qauv kev ncaj ncees ntawm lub rooj sib txoos. Txawm li cas los xij, nws tseem yog ib qho tseem ceeb siv cov ntaub ntawv vuam tsim nyog (xws li E43 series hluav taws xob kom ua tiav cov txheej txheem kom ua tiav cov txiaj ntsig zoo. Rau tuab heev t195 ci lossis hauv cov chaw kho mob txias, me me yuav raug pom zoo, tab sis qhov no yog qhov tsis tshua muaj piv rau cov pa roj carbon ntau dua. Lawv cov Weldability zoo kuj tseem txo cov nqi zog thiab cov nqi sijhawm thaum kev tsim kho.
Teeb 4
Q: Dab tsi yog qhov txawv ntawm S235JR thiab S235J0 qauv hlau teeb?
A: Lub ntsiab sib txawv ntawm S235JR thiab S235JR thiab cov kev cuam tshuam cov kev xav tau nruj. S235JR yog qhov dav dav - lub hom phiaj qib uas tsis xav tau kev cuam tshuam tshwj xeeb rau kev siv hluav taws xob, thaum S235J0 yuav tsum tau muab cov khoom siv cuam tshuam tsawg kawg, thaum S235J0 yuav tsum tau muab tso rau qhov kev cuam tshuam zoo tsawg Nyob rau hauv cov nqe lus ntawm cov tshuaj muaj tshuaj lom neeg thiab cov txheej txheem yooj yim dua (tawm lub zog, lawv yog qhov zoo kawg li {14}. Tus "JR" thiab "J0" BITEXes nyob rau qib kev kawm qhia qhov kev cuam tshuam kub (JR: chav tsev kub, J0: Qib). Thaum xaiv ntawm lawv, xav txog qhov kev ua haujlwm ntawm tus qauv: S235JR yog txaus rau huab cua sov txaus, thaum S235J0 zoo dua rau cov cheeb tsam txias lossis cov phiaj xwm nrog nruj tawv. Nco ntsoov xyuas cov kev qhia ua haujlwm kom paub meej tias cov qib xav tau.
Q: Puas BS Cov Txheej Txheem Head1000 h- Beams muaj nyob hauv qhov ntev?
A: Yog, BS Txheem DEA1000 h- Beams muaj nyob rau ntau qhov ntev kom tau raws li cov kev xav tau sib txawv. Tus qauv ntev feem ntau suav nrog 6m, 9m, 12m, thiab 15m, uas yog feem ntau rau cov qauv hlau txheej txheem. Txawm li cas los xij, ntau tus neeg tsim khoom lag luam muaj cov kev cai sib cav, tso cai rau koj kom koj xaj kom ntev (piv txwv li, 7.5m, 10m) raws li koj cov cai tsim. Qhov no pab kom txo cov khoom siv pov tseg thiab ua kom yooj yim installation los ntawm kev zam cov pob qij txha tsis tsim nyog. Thaum thov kev cai ntev, nws yog ib qho tseem ceeb uas yuav tau txiav txim kev thauj mus los- ntev ci ci yuav xav tau cov tsheb tshwj xeeb lossis cov ntawv tso cai yuav nce nqi. Koj kuj yuav tsum tau lees tias tus xa khoom tsawg kawg thiab kev cai kev cai ntev lawv tuaj yeem muab, nrog rau ib qho ntxiv cov hmoov txhuas ntxiv rau kev cai txiav. Qhov muaj ntawm cov sib txawv ntev ua kom muaj txiaj ntsig zoo hauv cov qauv tsim qauv thiab kev ua tiav.
Q: Yuav ua li cas xaiv cov qib kom yog rau cov roj carbon hlau i - Beams?
A: Xaiv cov qib rau cov pa hlau i {{{} ci cis muaj ntau kauj ruam tseem ceeb. Ua ntej, txiav txim siab cov khoom uas yuav tsum tau ntawm koj cov qauv {{2} Xaiv cov kab teeb ntau (piv txwv li cov khoom siv hnyav, S235 rau lub teeb ntim). Tom ntej no, xav txog thaj chaw ib puag ncig: Yog tias cov nqaj yuav raug rau cov menyuam txias txias, xaiv ib qib uas muaj qhov qis qis (zoo li S235J0 lossis Q345B). Weldability yog lwm yam- back- Cov qhab nia qis rau weld dua li siab- cov pa roj carbon. Tsis tas li, soj ntsuam ua raws li cov lej hauv tsev thiab cov phiaj xwm kev qhia tawm, raws li qee qhov haujlwm yuav xav tau cov qauv tshwj xeeb (ASTM, GB). Tus nqi yog qhov kev txiav txim siab dhau - qib siab dua-}}}}} Cov tuab npaum li cas, yog li sib npaug nrog pob nyiaj siv. Thaum kawg, sab laj tus kws ua haujlwm tsim qauv rau qhov koj xaiv, kom cov qib ua kom txhua txoj kev ua tiav txhua yam thiab kev nyab xeeb yuav tsum tau ua txhua yam thiab kev nyab xeeb yuav tsum tau ua txhua yam thiab kev nyab xeeb yuav tsum tau ua txhua yam thiab kev nyab xeeb cov kev xav tau.
Q: Dab tsi yog qhov kev kho kom pom kev kho qau rau q235b h - Beams?
A: Q235B h - ci ci muab ob peb cov kev xaiv saum npoo los txhim kho corrosion tsis kam thiab kav ntev. Feem ntau cov yog pleev xim {}} thov ib qho primer thiab topcoat (zoo li epoxy lossis polyurethane pleev xim rau ya raws thiab oxygen. Galvanizing yog lwm txoj kev ua tau zoo: kub- dip galvanizing cov nqaj ntawm zinc, uas muab cov khoom tiv thaiv ntev, tshwj xeeb tshaj yog hauv cov chaw noo noo. Rau cov phiaj xwm nrog kev ua kom zoo siab ua kom zoo nkauj, hmoov txheej yog ib qho kev xaiv- nws muaj qhov ua kom tiav, ua kom tiav thiab zoo tsis kam mus chipping thiab fading. Phosphat yog qee zaum siv ua ntej- kev kho ua ntej tha xim lossis txheej kom txhim kho adhesion. Muaj qee kis, tsis muaj kev kho saum npoo av yog xav tau rau cov ntawv thov sab hauv tsev nrog cov kev pheej hmoo tsawg, tab sis yog kev tu tas li. Kev xaiv ntawm kev kho deg yog nyob ntawm ib puag ncig, lifespan yuav tsum tau, nyiaj txiag, thiab kev lom zem. Tham txog koj cov kev xav tau nrog tus neeg xa khoom tuaj yeem pab xaiv cov kev xaiv tsim nyog tshaj plaws.
Q: Ua Astm Txheej Txheem Hlau Beams tuaj nrog cov ntawv pov thawj zoo?
A: Yog, ASTM cov txheej txheem hlau teeb yuav luag txhua tus tuaj nrog cov ntawv pov thawj zoo, uas yog qhov tseem ceeb rau kev ua kom muaj kev ua raws cai thiab kev nyab xeeb. Daim ntawv pov thawj feem ntau yog cov ntawv xeem ntawv pov thawj (MTC), tseem hu ua daim ntawv qhia xeem zeb (MTR). Cov ntaub ntawv no tau tawm los ntawm cov chaw tsim khoom thiab suav nrog cov ncauj lus kom ntxaws, muaj zog ntawm cov roj carbon, thiab lwm yam ntawm cov qauv tshuaj ntsuab (piv txwv li, t {6} ge} Beams). Rau cov phiaj xwm tseem ceeb, koj tuaj yeem thov ib hom ntawv pov thawj 3.1 uas tau txheeb xyuas los ntawm tus thib peb ntawm cov neeg sab nraud, lossis hom 3.2 daim ntawv pov thawj, uas suav nrog kev xeem thib peb. Nws yog ib qho tseem ceeb rau 索要 thiab tshuaj xyuas MTC thaum xa tuaj kom paub meej tias cov kab teeb tau ntsib koj txoj haujlwm. Yog tias tus xa khoom tsis tuaj yeem muab daim ntawv pov thawj zoo siv tau, nws tau pom zoo kom tsis lees txais cov zaub mov xa tuaj raws li nws yuav qhia tsis yog- ua raws lossis substard cov khoom.
