Cov kav hlau tsis muaj qhov tsis sib xws nyob hauv txoj haujlwm tseem ceeb hauv kev lag luam niaj hnub no thiab siv dav hauv kev tsim kho, kev tsim khoom siv tshuab, petrochemical thiab lwm yam teb.EN 10210tshwj xeeb tshaj yog qhia txog cov kav hlau tsis muaj qhov sib txuas rau cov qauv, ntawm cov uas BS EN 10210-1 yog cov lus qhia tshwj xeeb rau cov hlau kub dov uas tsis yog hlau thiab cov hlau zoo. Cov qib feem ntau hauv cov qauv no suav nrog S235GRH, S275JOH, S275J2H, S355JOH thiab S355J2H.

Ua ntej, S235GRH yog cov hlau qib yooj yim, feem ntau yog siv rau cov khoom siv hauv qab kev ntxhov siab tsawg thiab qhov kub thiab txias. Nrog lub zog tso zis ntawm 235MPa, nws muaj kev sib txuas zoo thiab kev ua kom txias, thiab tsim nyog rau kev tsim kho dav dav thiab cov qauv kho tshuab.

Tom ntej no yog S275JOH thiab S275J2H. S275JOH muaj zog zoo ntawm -20 ℃ thiab lub zog tso zis ntawm 275MPa, thiab feem ntau yog siv rau kev tsim kho vaj tse thiab cov haujlwm choj nrog cov khoom thauj nruab nrab. S275J2H muaj zog cuam tshuam zoo dua ntawm -20 ℃, thiab nws tsim nyog rau cov khoom siv uas xav tau kev nyab xeeb siab dua.

S355JOHthiabS355J2Hyog cov hlau muaj zog siab. S355JOH muaj kev tawv zoo heev ntawm qhov kub thiab txias hauv chav tsev thiab qhov kub qis (-20 ℃), nrog lub zog tso zis ntawm 355MPa, thiab siv dav hauv cov haujlwm tsim kho uas muaj kev ntxhov siab thiab tseem ceeb, xws li cov tsev siab thiab cov choj loj. S355J2H muaj kev tawv tawv ntau dua ntawm -20 ℃, thiab tsim nyog rau thaj chaw txias heev lossis cov haujlwm uas xav tau kev nyab xeeb ntxiv.

Tus qauv EN 10210 tsis yog tsuas yog teev meej meej txog cov tshuaj lom neeg thiab cov khoom siv kho tshuab ntawm cov kav hlau xwb, tab sis kuj tseem muab cov kev cai tshwj xeeb rau kev kam rau siab, qhov zoo ntawm qhov chaw, kev sim tsis puas tsuaj, thiab lwm yam. Qhov no ua kom ntseeg tau tias cov kav hlau sib xws thiab kev ntseeg tau thaum lub sijhawm tsim khoom thiab siv.

Cov yeeb nkab hlau tsis muaj qhov sib txuas yog tsim los ntawm kev siv tshuab kub dov, uas muab cov khoom siv kho tshuab zoo heev thiab qhov tseeb ntawm qhov ntev. Cov txheej txheem kub dov tuaj yeem tshem tawm qhov kev ntxhov siab hauv cov yeeb nkab hlau, txhim kho cov qauv kev teeb tsa ntawm cov hlau, thiab txhim kho nws cov kev ua tau zoo. Piv nrog cov yeeb nkab hlau welded, cov yeeb nkab hlau tsis muaj qhov sib txuas muaj zog compressive, bending thiab torsional siab dua, thiab tsim nyog rau kev txhawb nqa cov qauv thiab kev thauj mus los kua dej hauv ntau yam kev ua haujlwm nyuaj.

Feem ntau, cov kav hlau tsis muaj seamless uas tsim tawm raws li EN 10210 tus qauv qhia txog kev ua tau zoo heev hauv kev tsim kho thiab kev lag luam. Cov kav hlau ntawm qib xws li S235GRH, S275JOH, S275J2H, S355JOH, thiab S355J2H muaj lawv tus kheej cov yam ntxwv thiab tuaj yeem ua tau raws li qhov xav tau ntawm ntau yam haujlwm. Lawv daim ntawv thov dav tsis yog tsuas yog txhim kho qhov zoo thiab kev nyab xeeb ntawm cov haujlwm, tab sis kuj txhawb kev txhim kho thiab kev tsim kho tshiab ntawm cov khoom siv hlau. Kev xaiv cov kav hlau tsis muaj seamless ntawm cov qib thiab cov lus qhia tsim nyog yog qhov tseem ceeb rau kev ua kom muaj kev ruaj khov mus sij hawm ntev thiab cov txiaj ntsig kev lag luam ntawm cov haujlwm.