ASTM A252 GR3 tus qauv qhia cov kev cai nruj rau sab nraud, phab ntsa tuab, thiab qhov hnyav ntawm cov yeeb nkab steel. Qhov sib txawv ntawm qhov sib txawv ntawm txoj kab uas hla los ntawm cov kab uas tau teev tseg yuav tsum tsis pub tshaj 1% kom ntseeg tau tias kev txhim kho thiab kev ua haujlwm raug. Kuj tseem muaj qhov sib txawv ntawm qhov sib txawv ntawm phab ntsa tuab kom ntseeg tau tias tag nrho lub zog thiab ruaj khov ntawm pawg. Txhua pawg yuav tsum tau hnyav ib tus zuj zus, thiab qhov hnyav yuav tsum tsis txhob sib txawv ntawm qhov ntsuas qhov hnyav los ntawm ntau dua 15% (hnyav) lossis 5% (tsis hnyav).
A252 GR3 yog dav siv nyob rau hauv lub hauv paus engineering rau lub tsev, txuas hniav, thiab txoj kab nqes tiv thaiv. Raws li kev thauj khoom mus tas li-cov khoom siv, cov yeeb nkab steel tuaj yeem tiv taus cov khoom hnyav thiab kev kub ntxhov, muab kev txhawb nqa ruaj khov rau cov qauv. Hauv kev tsim choj choj, cov yeeb nkab steel feem ntau yog siv los txhawb cov qauv ntawm cov piers thiab abutments kom ntseeg tau tias kev ruaj ntseg thiab kev nyab xeeb ntawm tus choj. Tsis tas li ntawd, cov yeeb nkab steel kuj tseem tuaj yeem ua haujlwm rau cam khwb cia- hauv- qhov chaw pob zeb, ua cov pawg sib xyaw ua ke nrog cov pob zeb, txhim kho cov pawg load- cov kabmob muaj peev xwm thiab tsis kam mus rau sab nraud.
ASTM A252 (GR.3 LSAW) Carbon Steel Pipe specification
Txuj: ASTM A252;
Qib: Qib 3 lossis GR.3;
Txheej Txheem: SSAW lossis SAWH lossis DSAW;
Sab nraud txoj kab uas hla: DN 200 - 3500;
Phab ntsa thickness: 5 - 25 mm;
Txheej: Xim, kua roj vanish, galvanized, zinc- nplua nuj epoxy, 3LPE, thee tar epoxy, thiab lwm yam;
MOQ: 30 tuj;
Kev Them Nyiaj: T / T, L / C.
ASME SA252 Gr 3 Pipes Cov Khoom Siv Tshuaj
Mechanical Properties ntawm A252 Qib 3 steel yeeb nkab
A252 Carbon Steel Yeeb Nkab Tensile Requirements
A252 Qib 3 Yeeb Nkab Pile Daim Ntawv Qhia
Daim ntawv thov
Super High-Rise Building Foundations
Siv rau hauv cov pob zeb sib sib zog nqus hauv cov skyscrapers, cov chaw lag luam loj, thiab lwm yam, kom tiv taus cov khoom siv siab heev (GR3 yield zog Ntau dua lossis sib npaug rau 345MPa, siab dua GR2's 290MPa).
Cov xwm txheej: Pile lub hauv paus rau cov tsev tshaj 50 zaj dab neeg feem ntau ncav cuag qhov tob ntawm 60-100 meters, yuav tsum tau GR3 qib kav los tiv thaiv lateral av siab.
Hla -Hiav Txwv Choj thiab Qhov tob-Dej Wharves
Siv los ua cov hlau ruaj khov nyob rau hauv corrosive marine ib puag ncig los tiv thaiv lub cev pob zeb (yuav tsum tau tiv thaiv- txheej txheej).
Superior resistance to seawater erosion piv rau GR2, haum rau cov dej hnyav nrog nthwv dej siab Ntau dua lossis sib npaug li 3m (piv txwv li, hla- hiav txwv choj piers).
Seismic-Resistant Structures nyob rau hauv Liquefied Geological Zones
Hauv av qeeg -cov cheeb tsam uas muaj dej liquefied av, steel- cov pob zeb sib xyaw ua ke txhim kho cov txheej txheem toughness (GR3 muaj qhov elongation tus nqi ntau dua lossis sib npaug li 18%, muab qhov muaj zog deformation tsis kam).
ASTM A252 GR3 Hlau Yeeb Nkab Test
Kev Ntsuas Hydrostatic: Tsis tau teev tseg.
Number of Tests: Ib qho kev ntsuas tensile ib 200 qhov ntev.
Mechanical Tests: Tensile Test: Ob leeg longitudinal lossis transverse ntawm kev xaiv ntawm cov chaw tsim khoom
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