Imibhobho yentsimbi engenamthungo inokwahlulwa ibe yi-ASTM yaseMelika esemgangathweni yemibhobho yentsimbi, iDIN yaseJamani imibhobho yentsimbi engenamthungo esemgangathweni, imibhobho yentsimbi esemgangathweni yeJIS yaseJapan, imibhobho yentsimbi yesizwe engenamthungo ye-GB, imibhobho yentsimbi engenamthungo ye-API kunye nezinye iindidi ngokwemigangatho yazo.Imibhobho yentsimbi engenamthungo ye-ASTM yaseMelika ikwi-Iqhelekile kumazwe ngamazwe kwaye ineentlobo ezininzi kunye namasebe.
Ngoku iiparamitha ezifanelekileyo zombhobho wensimbi ongenamthungo we-ASTM we-ASTM stm a210/a210m/astm sa210/sa-210s umbhobho wentsimbi esemgangathweni waseMelika zidweliswe ngolu hlobo lulandelayo:I-ASTM A210/A210M/ASME SA-210/SA-210M Injongo: ilungele iityhubhu zebhoyila kunye nezibhoyila Imibhobho yoflue, kubandakanywa neziphelo zokhuseleko, iivaults kunye nemibhobho yenkxaso, kunye nobukhulu bodonga obuncinane obungenamthungo obuphakathi kwemibhobho yentsimbi yekhabhoni kwimibhobho yesifudumezisi esikhulu.Ikakhulu ivelisa amabakala emibhobho yensimbi: A-1, C, njl. Emva kothetha-thethwano, amanye amabakala emibhobho yentsimbi nawo angabonelelwa.
Inkqubo yokwenziwa kwemibhobho yentsimbi engenamthungo:
Imibhobho yentsimbi engenamthungo yahlulwe yaba yimibhobho yentsimbi engenamthungo eshushu-isolwe ngokushushu, imibhobho yentsimbi engenamthungo etsalwa ngokubanda, njl.njl ngokwenkqubo yokuvelisa.Ubukhulu bemibhobho yentsimbi engenamthungo ngokuqhelekileyo yi-406mm-1800mm, kwaye ubukhulu bodonga yi-20mm-220mm.Ngokusetyenziswa kwazo, zinokwahlulwa zibeimibhobho yentsimbi engenamthungo yezakhiwo, imibhobho yentsimbi engenamthungo yolwelo, imibhobho yentsimbi engenamthungo yeebhoyila, kwayeimibhobho yentsimbi engenamthungo kwimibhobho yeoli.