Liyini izinga le-ASTM lesiteshi C?

Ekwakhiweni nasekwakhiweni, ukusetshenziswa kwensimbi yesiteshi (evame ukubizwa ngokuthi insimbi ye-C-section) kuvame kakhulu. Lezi ziteshi zenziwe ngensimbi futhi zimise njengo-C, yingakho igama. Zivame ukusetshenziswa embonini yezokwakha futhi zinezinhlobonhlobo zokusetshenziswa. Ukuqinisekisa ukuthi ikhwalithi nokucaciswa kwensimbi yesigaba se-C kuyagcinwa, i-American Society for Testing and Materials (ASTM) ithuthukisa amazinga ale mikhiqizo.

Izinga le-ASTM leInsimbi emise okwe-Cibizwa nge-ASTM A36. Leli zinga lihlanganisa ukwakheka kwekhwalithi yensimbi yekhabhoni ukuze kusetshenziswe ekwakhiweni kwamabhuloho namabhilidi afakwe amabhuloho namabhilidi kanye nezinjongo ezijwayelekile zesakhiwo. Leli zinga licacisa izidingo zokwakheka, izakhiwo zemishini kanye nezinye izici ezibalulekile ze-carbon steel C-sections.

Enye yezidingo ezibalulekile ze-ASTM A36 ejwayelekile yeInsimbi ye-C-channelukwakheka kwamakhemikhali ensimbi esetshenziswa ekukhiqizeni kwayo. Izinga lidinga insimbi esetshenziselwa izigaba C ukuze iqukathe amazinga acacisiwe ekhabhoni, i-manganese, i-phosphorus, isulfure nethusi. Lezi zidingo ziqinisekisa ukuthi insimbi esetshenziswa ku-C-channel inezakhiwo ezidingekayo ukuze inikeze amandla nokuqina okudingekayo ekusetshenzisweni kwesakhiwo.

Ngokungeziwe ekwakhiweni kwamakhemikhali, izinga le-ASTM A36 liphinde licacise izakhiwo zensimbi ezisetshenziswa kunsimbi yesigaba C. Lokhu kuhlanganisa izidingo zamandla esivuno, amandla aqinile kanye nobude bensimbi. Lezi zakhiwo zibalulekile ukuze kuqinisekiswe ukuthi insimbi ye-C-channel inamandla adingekayo kanye ne-ductility ukuze imelane nemithwalo kanye nokucindezeleka okuhlangenwe nakho kwezicelo zokwakha.

Izinga le-ASTM A36 liphinde lihlanganise ukubekezelelana kobukhulu kanye nezidingo eziqondile nezigobile zensimbi yesigaba se-C. Lokhu kucaciswa kuqinisekisa ukuthi izigaba C ezikhiqizwe kuleli zinga zihlangabezana nezidingo zosayizi nezimo ezidingekayo ukuze zisetshenziswe ezihlosiwe kumaphrojekthi wokwakha.

Sekukonke, izinga le-ASTM A36 lensimbi emise okwe-C linikeza isethi ebanzi yezidingo zekhwalithi nokusebenza kwalezi zinsimbi. Ngokunamathela kuleli zinga, abakhiqizi bangaqinisekisa ukuthi izigaba ze-C abazikhiqizayo ziyahlangabezana nokucaciswa okudingekayo kwezicelo zokwakha.

Kafushane, indinganiso ye-ASTM yeInsimbi ye-C-channel, eyaziwa ngokuthi i-ASTM A36, icacisa izimfuneko zokwakheka kwamakhemikhali, izakhiwo zemishini, nokubekezelelwa kwe-dimensional kwalezi zinsimbi. Ngokuhlangabezana nalezi zidingo, abakhiqizi bangakhiqiza izigaba ze-C zekhwalithi ephezulu ezihlangabezana namazinga adingekayo ezinhlobonhlobo zezicelo zokwakha. Kungakhathaliseki ukuthi amabhuloho, imishini yezimboni noma izakhiwo, ukunamathela kuzindinganiso zensimbi ze-ASTM C-section kuqinisekisa ukuphepha nokuthembeka kwensimbi esetshenzisiwe.