ASTM A252 Qib 3yog cov khoom siv feem ntau siv ua cov yeeb nkab cylindrical.
Cov yeeb nkab hlau qib 3 tsis txwv rau cov txheej txheem tsim khoom tshwj xeeb thiab tuaj yeem tsim tau los ntawm ntau txoj kev tsim cov yeeb nkab, suav nrogSMLS(tsis muaj qhov sib txuas),SAW(submerged arc welded), thiabEFW(electro-fusion welded). Qhov kev ywj pheej no tso cai rau nws kom hloov kho rau ntau yam kev xav tau engineering thiab cov xwm txheej thov.
Raws li qib siab tshaj plaws hauv tus qauv A52, nws muaj cov khoom siv kho tshuab zoo heev nrog lub zog tsawg kawg nkaus ntawm 310 MPa thiab lub zog tensile tsawg kawg nkaus ntawm 455 MPa thiab tuaj yeem siv ua cov khoom siv thauj khoom ruaj khov lossis ua lub plhaub rau cov pob zeb ua vaj tse uas tau pov tseg.
LubASTM A252Tus qauv faib cov yeeb nkab hlau ua peb qib kom haum rau ntau qhov chaw siv thiab cov kev xav tau thauj khoom. Peb qib yog:
Qib 1, Qib 2, thiab Qib 3.
Lub tuam txhab tau qhia txog cov khoom siv ua tiav ntawm JCOE LSAW steel yeeb nkab tsim khoom siv thiab cov khoom siv kuaj, tshwj xeeb hauv kev tsim cov yeeb nkab LSAW steel tuab-phab ntsa, loj-txoj kab uas hla nrog DSAW (ob sab submerged arc vuam).
Cov lus qhia ntawm cov khoom yog:
Txoj kab uas hla sab nraud: DN 350 – 1500;
Phab ntsa tuab: 8 – 80 hli;
Cov kav dej yuav tsum yog qhov kawg tiaj tus.
Cov qhov kawg yuav tsum tau txiav los ntawm hluav taws los yog tshuab txiav thiab tshem tawm cov burrs.
Nyob rau hauv cov ntaub ntawv ntawmcov xaus beveledlub kaum sab xis ntawm qhov kawg beveled yuav tsum yog30 - 35°.
Botop Hlaumuaj ntau yam kav hlau ASTM A52 zoo. Thov koj xav tiv tauj peb yog tias koj xav tau.
Cov hlau yuav tsum ua los ntawm ib lossis ntau yam ntawm cov txheej txheem hauv qab no: qhib-hearth, basic-oxygen, lossis hluav taws xob-cub.
A252 yuav tsum ua los ntawmtsis muaj qhov tsis sib xws, hluav taws xob tsis kam welded, flash welded, los yogfusion weldedtxheej txheem.
Cov seams ntawm cov yeeb nkab welded yuav tsum tau ua kom huv sintev, helical-butt, los yoghelical-lap.
Yuav kom ntseeg tau tias qhov zoo thiab kev ua tau zoo ntawm cov yeeb nkab steel, nws yog ib qho tseem ceeb heev rau kev xaiv cov txheej txheem tsim khoom kom raug.
Cov txheej txheem LSAW (SAWL) yog qhov zoo tagnrho rau cov yeeb nkab hlau loj, phab ntsa tuab., tshwj xeeb tshaj yog nyob rau hauv kev tsim kho thiab cov haujlwm tsim kho vaj tse uas xav tau lub peev xwm siab thiab kev tsim kho lub hauv paus tob. Vim nws lub zog zoo dua, lub peev xwm nqa khoom, thiab kev hloov pauv tob, nws muaj peev xwm hloov kho rau ntau yam kev mob geological nyuaj thaum muab cov txiaj ntsig ntawm kev teeb tsa sai thiab kev ruaj khov mus sij hawm ntev.
JCOEyog ib qho txheej txheem tsim khoom siv hauv kev tsim cov yeeb nkab LSAW, uas muaj qhov zoo ntawm kev ua haujlwm siab, zoo, muaj peev xwm tsim khoom loj, qhov tseeb ntawm qhov ntev, kev hloov pauv tau, thiab kev txuag nyiaj, uas ua rau nws yog cov txheej txheem tsim yeeb nkab nyiam hauv ntau qhov project engineering loj.
Cov hlau yuav tsum muajtsis pub ntau tshaj 0.050% phosphorous.
Kev txwv cov phosphorus hauv cov hlau yog kom ntseeg tau tias cov hlau muaj cov khoom siv kho tshuab zoo, tshwj xeeb tshaj yog thaum siv rau cov ntawv thov kev tsim kho xws li kev tsim kho piling.
Qhov kev txwv no pab tiv thaiv cov hlau kom tsis txhob tawg yooj yim thaum kub qis, yog li ua kom nws muaj kev nyab xeeb thiab kev ntseeg siab thaum siv.
Rau lwm cov ntsiab lus ntawm cov khoom, tsis muaj qhov yuav tsum tau ua.
Qhov no yog vim tias lub hom phiaj tseem ceeb ntawm cov yeeb nkab pawg yog xyuas kom meej tias cov yeeb nkab muaj lub zog thiab kev tawv txaus, uas yog cov khoom tseem ceeb rau kev siv hauv cov qauv txhawb nqa.
Rau cov raj tubular pile, ntau qhov kev saib xyuas tau them rau cov khoom siv kho tshuab ntawm cov raj, xws li lub zog yield, lub zog tensile, thiab toughness, vim tias cov khoom no muaj feem cuam tshuam ncaj qha rau lub peev xwm nqa khoom thiab kev ruaj khov ntawm cov qauv tubular hauv kev siv tiag tiag.
ARooj 2 muab cov nqi tsawg kawg nkaus uas tau suav:
Qhov twg qhov tuab ntawm phab ntsa uas teev tseg yog nruab nrab rau cov uas tau qhia saum toj no, tus nqi elongation tsawg kawg nkaus yuav tsum txiav txim siab raws li hauv qab no:
Qib 3: E = 32t + 10.00 [E = 1.25t + 10.00]
E: kev ntev hauv 2 nti. [50.8 hli], %;
t: teev tseg nominal phab ntsa thickness, nyob rau hauv. [mm].
Tus qauv ASTM A252 Qib 3 ua kom muaj kev nyab xeeb thiab kev ntseeg siab ntawm cov tubular piles siv los ntawm kev teeb tsa qhov yuav tsum tau ua tsawg kawg nkaus rau cov khoom siv kho tshuab no.
Rau qhov loj ntawm cov yeeb nkab uas tsis tau teev nyob rau hauv cov lus qhia txog qhov hnyav ntawm cov yeeb nkab, qhov hnyav ib chav ntev tuaj yeem suav tau siv cov mis.
w = C×(Dt)×t
w: qhov hnyav ib chav ntev, Ilb/ft [kg/m];
D: teev sab nraud txoj kab uas hla, nyob rau hauv. [hli];
t: teev tseg nominal phab ntsa thickness, nyob rau hauv. [mm];
C0.0246615 rau kev xam zauv hauv SI units thiab 10.69 rau kev xam zauv hauv USC units.
Cov kev xam saum toj no yog raws li qhov kev xav tias qhov ceev ntawm cov yeeb nkab hlau yog 7.85 kg / dm³.
ASTM A252 Qib 3 muaj lub zog siab thiab tawv rau ntau yam av thiab cov kev cai thauj khoom. Cov yeeb nkab hlau no feem ntau siv rau hauv cov ntawv thov hauv qab no:
1. Tsim lub hauv pausASTM A252 Qib 3 cov yeeb nkab hlau yog siv los ua lub hauv paus rau cov tsev siab, cov choj, thiab lwm yam qauv loj kom muab kev txhawb nqa thiab kev ruaj khov.
2. Chaw nres nkoj thiab chaw nres nkoj: Cov kav hlau no yog siv rau kev txhim kho hauv kev tsim kho chaw nres nkoj thiab chaw nres nkoj kom ntseeg tau tias cov qauv muaj peev xwm tiv taus kev cuam tshuam ntawm cov nkoj thiab kev yaig ntawm ib puag ncig hauv hiav txwv. Txhawm rau kom ua kom muaj kev ruaj khov thiab tiv taus kev xeb ntawm cov kav hlau, cov txheej txheem feem ntau siv los muab kev tiv thaiv ntxiv.
3. Cov dej ua haujlwmASTM A252 Qib 3 cov yeeb nkab hlau yog siv los txhawb cov ntug dej thiab muab kev tiv thaiv dej nyab hauv kev tsim cov pas dej, cov qhov rooj xauv, thiab lwm yam chaw dej.
4. Cov haujlwm fais fabHauv lub zog cua, cov roj rigs, thiab lwm yam haujlwm tsim kho vaj tse, cov kav hlau no yog siv los ua cov qauv txhawb nqa kom ntseeg tau tias cov khoom siv ua haujlwm ruaj khov.
5. Cov chaw thauj mus losASTM A252 Qib 3 cov yeeb nkab hlau yog siv rau kev txhim kho txoj kev tsheb ciav hlau, txoj kev loj, thiab txoj kev khiav tshav dav hlau kom muaj peev xwm thauj khoom txaus thiab ruaj khov.
Txij li thaum nws tau tsim tsa xyoo 2014,Botop Hlautau dhau los ua tus thawj coj ntawm cov yeeb nkab hlau carbon hauv Northern China, paub txog kev pabcuam zoo heev, cov khoom lag luam zoo, thiab cov kev daws teeb meem dav dav.
Botop Hlaumuaj ntau yam yeeb nkab hlau carbon thiab cov khoom lag luam cuam tshuam, suav nrog cov yeeb nkab hlau tsis sib xws, ERW, LSAW, thiab SSAW, nrog rau cov khoom siv yeeb nkab thiab cov flanges tiav. Nws cov khoom tshwj xeeb kuj suav nrog cov hlau alloys zoo thiab cov hlau stainless austenitic, tsim los ua kom tau raws li qhov xav tau ntawm ntau yam haujlwm yeeb nkab.
ASTM A252 GR.2 GR.3 Seamless Steel Piles Yeeb Nkab
ASTM A252 GR.3 SSAW Hlau Piles Yeeb Nkab
AS 1579 SSAW Dej Hlau Yeeb Nkab Thiab Hlau Pawg
EN10219 S355J0H LSAW (JCOE) Cov Yeeb Nkab Hlau
EN 10219 S275J0H/S275J2H ERW Cov Yeeb Nkab Hlau Rau Cov Qauv
BS EN10210 S355J0H Cov Yeeb Nkab Hlau Tsis Muaj Qhov Txuas
EN10210 S355J2H COV KHOOM SIV ERW STEEL YEEB
API 5L PSL1 & PSL2 GR.B Longitudinal Submerged-Arc Welded Yeeb Nkab
ASTM A501 Qib B LSAW Cov Hlau Carbon Steel Structural Tubing
ASTM A672 B60/B70/C60/C65/C70 LSAW Cov Yeeb Nkab Hlau Carbon
ASTM A671/A671M LSAW Cov Yeeb Nkab Hlau
ASTM A500 Qib C Seamless Steel Structural Tube
