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 yentsimbi: 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.