Hauv thaj teb ntawmcov kav hlau, cov qauv rau arc welded ncaj seam steel kav yog qhov tseem ceeb.Ib qho ntawm cov qauv yog GB / T3091-2008, uas suav nrog ntau hom kab ncaj nraim steel kav, xws li kev ua haujlwm siab.welded (ERW) steel kav, submerged arcwelded (SAWL) steel kavthiab kauv seam submerged arc welded (SAWH) steel kav.) Cov yeeb nkab steel.
Rau kev thauj mus los ntawm cov dej tsis tshua muaj siab, GB / T3091-2008 kuj tseem qhia txog kev sivgalvanized welded steel kav.Cov kav dej hluav taws xob welded steel, feem ntau hu ua cov kav dej dawb, yog siv los thauj dej, roj, huab cua, roj, cua sov chav, dej sov, thiab lwm yam. Cov ntsiab lus ntawm cov kav hlau hlau no tau qhia nyob rau hauv nominal txoj kab uas hla, thiab sab nraud txoj kab uas hla thiab phab ntsa. thickness ua raws li cov kev cai ntawm GB / T21835.Ntxiv mus, qhov ntev ntawm cov yeeb nkab steel tuaj yeem nyob ntawm 300mm txog 1200mm, thiab nws tuaj yeem kho qhov ntev lossis ob qhov ntev.
Thaum nws los txog rau cov teeb meem zoo, qhov kub thiab txias thaum lub sij hawm tho qhov muaj qhov cuam tshuam loj.Thermal expansion steel kav feem ntau ncav cuag qhov kub ntawm 1200 ° C, txawm hais tias cov ntsiab lus carbon thiab alloying tuaj yeem txo qhov kub me ntsis.Lwm qhov tseem ceeb uas yuav tsum tau xav txog yog txo qhov ntsuas qhov ntsuas thaum kub khoov, vim qhov no tuaj yeem cuam tshuam rau lub neej ntawm lub cuab yeej thiab qhov zoo ntawm qhov chaw.
Kev ua haujlwm cua sov yog txheej txheem tseem ceeb hauv kev tsim khoom16Mn ncaj seam steel yeeb nkab.Txij li thaum feem ntau cov txheej txheem tshwm sim hauv lub xeev kub, kev tswj xyuas cov cua sov yog qhov tseem ceeb los xyuas kom meej qhov zoo ntawm cov khoom kawg.
Yuav kom tswj tau qhov zoo thiab cov qauv, kev tswj qhov kub thiab txias thaum lub sij hawm tho kev yog qhov tseem ceeb heev.Qhov ncaj seam steel yeeb nkab txheem GB / T3091-2008 qhia txog qhov tso cai sib txawv ntawm qhov loj, duab, qhov hnyav thiab sab nraud thiab phab ntsa tuab.Qhov tso cai sib txawv ntawm cov qauv phab ntsa thickness sib txawv raws li qib sib txawv, xws li S1 txog S5, thiab txhua qib qhia txog qhov sib piv thiab qhov sib txawv tsawg kawg nkaus.
Ntxiv nrog rau cov txheej txheem phab ntsa thickness kam rau ua, tsis yog-tus qauv phab ntsa thickness tolerances kuj raug txiav txim siab.Cov qib sib txawv (xws li NS1 txog NS4) suav nrog qhov feem pua ntawm qhov sib txawv los xyuas kom muaj kev tswj xyuas zoo.Nws yuav tsum tau muab sau tseg tias S sawv cev rau lub nominal phab ntsa thickness ntawm cov yeeb nkab steel, thiab D sawv cev rau lub nominal txheej kab ntawm steel yeeb nkab.
Xyuas kom ua raws li cov qauv no yog ib qho tseem ceeb rau kev tsim cov khoom zoo longitudinal submerged arc welded steel pawg kav.Los ntawm kev tswj xyuas qhov kub thiab txias thiab ua tib zoo saib xyuas qhov sib txawv ntawm qhov tso cai, cov tuam ntxhab tuaj yeem ua tau raws li cov neeg siv khoom xav tau thiab muab cov khoom lag luam txhim khu kev qha thiab ruaj khov.
Post lub sij hawm: Nov-10-2023