Phab ntsa tuab tuaj yeem hu ua atuab-walled steel yeeb nkab. Muaj qee qhov tsis ntseeg txog qhov no. Nws nyob ntawm qhov sib piv ntawm sab nraud ntawm cov yeeb nkab steel rau phab ntsa thickness ntawm cov yeeb nkab steel. Piv txwv li, cov yeeb nkab steel nrog txoj kab uas hla ntawm 50 mm, 10 mm tuaj yeem suav tias yog cov yeeb nkab tuab-walled steel. Txawm li cas los xij, rau txoj kab uas hla ntawm 219 hli, 10 hli tsuas yog cov yeeb nkab nyias nyias. Lub ntsiab txhais ntawm cov yeeb nkab tuab-walled yog nyob rau hauv dab tsi cov neeg siv khoom hu nws. Nco ntsoov tias thaum yuav cov kav hlau tuab tuab, cov neeg siv khoom yuav tsum qhia meej cov khoom ntawm lawv cov kav hlau steel thiab qhov ntev ntawm txhua cov yeeb nkab steel, vim qhov no suav nrog cov khoom siv thiab cov khoom pov tseg tsis tsim nyog.

Tom qab ntawd muaj cov ncauj lus kom ntxaws qhov ntev ntawm lub puab thiab sab nraud diameters ntawm cov yeeb nkab steel. Qhov no yuav tsum suav rau hauv vim qee qhov yuav tsum tau ua tiav. Thick-walled steel kav, raws li ib yam ntawm mechanically processed steel kav, muaj ntau yam kev faib tawm. Cov neeg siv khoom yuav tsum ua kom pom tseeb tias lawv xav tau cov kav dej kub dov seamless steel kav los yog cov kav dej tuab-walled steel kav, thiab qee cov cam khwb cia hlau tuab-walled steel kav thiab kub-forged tuab steel kav. Daim ntawv, cov lus piav qhia uas tuaj yeem hloov tau, qhov tseem ceeb ncaj qha uas tsis tuaj yeem hloov tau.