ASTM A252 Qib 3yog cov khoom siv feem ntau siv los ua cov yeeb nkab cylindrical.
Qib 3 steel yeeb nkab pawg tsis txwv rau cov txheej txheem tsim khoom tshwj xeeb thiab tuaj yeem tsim tau siv ntau yam kev tsim cov yeeb nkab, suav nrogSMLS(seamless),SAW(submerged arc welded), thiabEFW(electro-fusion welded).Qhov kev hloov pauv no tso cai rau nws hloov mus rau qhov sib txawv engineering xav tau thiab cov ntawv thov scenarios.
Raws li qib siab tshaj plaws nyob rau hauv tus qauv A52, nws muaj cov khoom siv zoo heev nrog lub zog qis kawg nkaus ntawm 310 MPa thiab lub zog tensile yam tsawg kawg nkaus ntawm 455 MPa thiab tuaj yeem siv los ua cov khoom siv thauj khoom mus tas li lossis ua lub plhaub rau cast-in - tso cov pob zeb ua ke.
CovASTM A252, ASTM A252txheem categorizes steel yeeb nkab pawg rau hauv peb qib kom haum rau qhov sib txawv daim ntawv thov ib puag ncig thiab cov khoom yuav tsum tau ua.Peb qib yog:
Qib 1, Qib 2, thiab Qib 3.
Lub tuam txhab tau tshaj tawm cov txheej txheem ua tiav ntawm JCOE LSAW steel yeeb nkab ntau lawm cov khoom siv thiab cov khoom siv kuaj, tshwj xeeb hauv kev tsim cov tuab-walled, loj-inch LSAW steel yeeb nkab nrog DSAW (ob-sided submerged arc vuam).
Cov khoom specifications yog:
Sab nraud: DN 350 - 1500;
Phab ntsa Thickness8-80 hli;
Cov yeeb nkab yuav tsum yog qhov kawg.
Qhov kawg yuav tsum yog nplaim-txiav lossis tshuab-txiav thiab deburred.
Nyob rau hauv cov ntaub ntawv ntawmbeveled xaus, lub kaum sab xis ntawm beveled kawg yuav tsum yog30-35 °.
Botop Steelmuaj ntau yam zoo ASTM A52 steel kav.Thov koj xav tiv tauj peb rau koj cov kev xav tau.
Cov hlau yuav tsum tau ua los ntawm ib lossis ntau cov txheej txheem hauv qab no: qhib-hearth, yooj yim-oxygen, lossis hluav taws xob-kub.
A252 yuav tsum tau ua los ntawm lubseamless, hluav taws xob kuj welded, flash welded, los yogfusion weldedtxheej txheem.
Lub seams ntawm welded yeeb nkab pawg yuav tsumntev, helical-qab, los yoghelical-plab.
Txhawm rau kom ntseeg tau tias qhov zoo thiab kev ua tau zoo ntawm cov yeeb nkab steel, nws yog ib qho tseem ceeb los xaiv cov txheej txheem tsim khoom kom raug.
Cov txheej txheem LSAW (SAWL) yog qhov zoo tagnrho rau qhov loj-inch, tuab-walled steel yeeb nkab, tshwj xeeb tshaj yog nyob rau hauv kev tsim kho thiab infrastructure tej yaam num uas yuav tsum tau siab load-bearing muaj peev xwm thiab sib sib zog nqus foundation tsim.Vim nws lub zog zoo tshaj plaws, lub peev xwm thauj khoom, thiab qhov tob adaptability, nws muaj peev xwm hloov tau mus rau ntau hom kev nyuaj geological tej yam kev mob thaum muab cov txiaj ntsig ntawm kev txhim kho sai thiab ua haujlwm ntev.
JCOEyog ib qho kev tsim cov txheej txheem hauv kev tsim cov LSAW steel yeeb nkab, uas muaj qhov zoo ntawm kev ua haujlwm siab, zoo siab, loj txoj kab uas hla ntau lawm, qhov tseeb qhov tseeb, yoog raws, thiab kev lag luam, uas tau ua rau nws nyiam cov yeeb nkab tsim cov txheej txheem hauv ntau qhov loj- scale engineering tej yaam num.
Cov hlau yuav tsum muajtsis ntau tshaj 0.050% phosphorus.
Kev txwv cov phosphorus cov ntsiab lus hauv cov hlau yog los xyuas kom meej tias cov hlau muaj cov khoom siv zoo, tshwj xeeb tshaj yog thaum siv rau cov qauv siv xws li kev tsim vaj tse.
Qhov kev txwv no yuav pab tiv thaiv cov hlau los ntawm kev ua nkig dhau ntawm qhov kub thiab txias, yog li ua kom nws muaj kev nyab xeeb thiab kev ntseeg siab hauv kev siv.
Rau lwm yam ntsiab lus, tsis muaj qhov yuav tsum tau ua.
Qhov no yog vim hais tias lub ntsiab tseem ceeb ntawm cov yeeb nkab pawg tub raj yog los xyuas kom meej tias cov hlab ntsha muaj lub zog txaus thiab toughness, uas yog cov khoom tseem ceeb rau kev siv hauv kev txhawb nqa.
Rau cov tubular pawg tub raj, ntau qhov kev saib xyuas yog them rau cov khoom siv ntawm cov raj, xws li lub zog tawm los, lub zog tensile, thiab toughness, vim tias cov khoom no ncaj qha cuam tshuam rau lub peev xwm thauj khoom thiab kev ruaj ntseg ntawm cov tubular pawg hauv kev siv tswv yim. .
ATable 2 muab cov txiaj ntsig yam tsawg kawg nkaus suav nrog:
Qhov twg qhov teev nominal phab ntsa thickness yog nruab nrab rau cov uas qhia saum toj no, qhov tsawg kawg nkaus elongation tus nqi yuav tsum tau txiav txim raws li nram no:
Qib 3: E = 32t + 10.00 [E = 1.25t + 10.00]
E: elongation hauv 2 nti [50.8 mm], %;
t: teev nominal phab ntsa thickness, nyob rau hauv. [mm].
ASTM A252 Qib 3 tus qauv ua kom muaj kev nyab xeeb thiab kev ntseeg siab ntawm cov tubular pawg hauv kev siv los ntawm kev teeb tsa yam tsawg kawg nkaus rau cov khoom siv tshuab no.
Rau cov yeeb nkab qhov ntev uas tsis tau teev nyob rau hauv cov yeeb nkab hnyav cov ntxhuav, qhov hnyav ntawm ib chav tsev ntev tuaj yeem suav nrog cov qauv.
w = C × (Dt) × t
w: hnyav ib chav tsev ntev, Ilb/ft [kg/m];
D: teev sab nraud txoj kab uas hla, hauv. [mm];
t: teev nominal phab ntsa thickness, nyob rau hauv. [mm];
C: 0.0246615 rau kev suav hauv SI units thiab 10.69 rau kev suav hauv USC units.
Cov kev suav sau saum toj no yog raws li qhov kev xav tias qhov ceev ntawm cov yeeb nkab steel yog 7.85 kg / dm³.
ASTM A252 Qib 3 muaj lub zog siab thiab toughness rau ntau yam av thiab cov kev cai thauj khoom.Cov yeeb nkab steel no feem ntau siv rau hauv cov ntawv hauv qab no:
1. Lub hauv paus tsim: ASTM A252 Qib 3 steel yeeb nkab yog siv los ua pawg hauv paus hauv kev ua haujlwm rau cov tsev siab siab, txuas hniav, thiab lwm cov qauv loj los muab kev txhawb nqa tsim nyog thiab ruaj khov.
2. Chaw nres nkoj thiab chaw nres nkoj: Cov kav dej steel no yog siv rau hauv kev tsim kho ntawm cov chaw nres nkoj thiab chaw nres nkoj kom ntseeg tau tias cov qauv muaj peev xwm tiv taus qhov cuam tshuam ntawm cov nkoj thiab kev yaig ntawm thaj chaw marine.Txhawm rau ua kom cov kav ntev thiab ua haujlwm rau corrosion ntawm cov kav hlau, cov txheej txheem feem ntau siv los muab kev tiv thaiv ntxiv.
3. Kev ua dej num: ASTM A252 Qib 3 steel yeeb nkab yog siv los txhawb cov ntug dej hiav txwv thiab muab kev tiv thaiv dej nyab hauv kev tsim cov dams, xauv, thiab lwm qhov chaw dej.
4. Lub zog ua haujlwm: Nyob rau hauv cua zog, roj rigs, thiab lwm yam zog infrastructure tej yaam num, cov steel kav no yog siv raws li kev txhawb nqa qauv los xyuas kom meej ruaj khov cov khoom.
5. Cov chaw thauj mus los: ASTM A252 Qib 3 steel yeeb nkab yog siv rau hauv kev tsim kho kev tsheb ciav hlau, kev loj, thiab tshav dav hlau khiav kom muaj peev xwm nqa tau txaus thiab ua haujlwm ntev.
Txij li thaum nws tsim nyob rau hauv 2014,Botop Steeltau dhau los ua tus xa khoom ntawm carbon steel yeeb nkab nyob rau sab qaum teb Tuam Tshoj, paub txog kev pabcuam zoo, cov khoom zoo, thiab cov kev daws teeb meem zoo.
Botop Steelmuaj ntau yam carbon steel kav thiab lwm yam khoom, xws li seamless, ERW, LSAW, thiab SSAW steel yeeb nkab, raws li zoo raws li ib tug tag nrho lineup ntawm cov yeeb nkab fittings thiab flanges.Nws cov khoom tshwj xeeb kuj suav nrog cov qib high-qib alloys thiab austenitic stainless hlau, tsim kom tau raws li qhov xav tau ntawm ntau yam kev siv kav dej.
ASTM A252 GR.2 GR.3 Seamless Steel Piles Yeeb Nkab
ASTM A252 GR.3 SSAW Steel Piles Yeeb Nkab
AS 1579 SSAW Dej Hlau Yeeb Thiab Hlau Pile
EN10219 S355J0H LSAW (JCOE) Cov yeeb nkab steel
TS EN 10219 S275J0H / S275J2H ERW Steel Yeeb Nkab Rau Cov Qauv
BS EN10210 S355J0H Carbon Seamless Steel Yeeb Nkab
EN10210 S355J2H STRUCTURAL ERW steel yeeb nkab
API 5L PSL1 & PSL2 GR.B Longitudinal Submerged-Arc Welded Yeeb Nkab
ASTM A501 Qib B LSAW Carbon Steel Structural Tubing
ASTM A672 B60 / B70 / C60 / C65 / C70 LSAW Carbon Steel Yeeb Nkab
ASTM A671 / A671M LSAW Steel Yeeb Nkab
ASTM A500 Qib C Seamless Steel Qauv Tube
