ASTM A53yog ib qho kev qhia dav dav rau seamless thiab welded dub thiab kub-dip galvanized steel yeeb nkab. Nws yog tsuas yog siv los thauj cov kua dej uas tsis tshua muaj siab xws li dej, cua, chav thiab roj. A53 los ntawm peb qib - A, B thiab C. Qib A yog qhov tsim nyog rau kev khoov, flanging thiab kev ua haujlwm zoo sib xws, thaum Qib B yog qhov feem ntau siv thiab muaj cov khoom siv ntau dua. A53 cov kav dej yog tsim los siv cov txheej txheem seamless lossis tsis kam welded (ERW). Welded yeeb nkab tuaj yeem dhau los ua cov txheej txheem ua haujlwm txias los txhim kho nws cov khoom siv kho tshuab. A53 cov kav dej yuav tsum tau kuaj xyuas hydrostatic thiab tsis muaj kev puas tsuaj hluav taws xob. Kev ntsuam xyuas hydrostatic yog ua los xyuas kom meej tias cov yeeb nkab tuaj yeem tiv taus qee qhov siab.
Deg Txheej: Cov qauv no tsis xav tau cov txheej txheem tshwj xeeb. Txawm li cas los xij, cov kav dej tuaj yeem raug txiav txim nrog galvanized txheej (galvanized) raws li kev thov.
ASTM A106 1yog ib qho kev qhia tshwj xeeb rau seamless carbon steel yeeb nkab tsim tshwj xeeb rau kev siv kub. Nws yog feem ntau siv rau hauv cov ntawv thov xws li kev tsim hluav taws xob, refineries, petrochemical cov nroj tsuag thiab cov kav dej kub siab. A106 tau muab faib ua peb qib: A, B thiab C. Qib B yog qhov feem ntau siv thiab muaj zog tensile zoo thiab tawm los ntawm qhov kub siab. A106 kav tsuas yog tsim los ntawm txoj kev seamless. Cov txheej txheem tsim seamless muab cov phab ntsa zoo dua qub thiab cov khoom siv kho tshuab piv rau cov yeeb nkab welded. A106 yeeb nkab tau dhau qhov kev sim nruj dua li A53. Ntxiv nrog rau kev ntsuas hluav taws xob hydrostatic thiab tsis muaj kev puas tsuaj, A106 tseem yuav tsum muaj kev sim ntxiv xws li flattening, khoov thiab ntsuas tensile. Zoo ib yam li A53, tus qauv no tsis qhia meej cov txheej txheem tshwj xeeb, tab sis cov kav dej tuaj yeem raug txiav txim nrog ntau txheej txheej nyob ntawm daim ntawv thov. Cov txheej txheem muaj xws li cov kua roj vanish dub, galvanized txheej lossis lwm yam txheej tiv thaiv.