Amapayipi ensimbi angenamthungo athatha isikhundla esibalulekile embonini yesimanje futhi asetshenziswa kabanzi ekwakhiweni, ukukhiqizwa kwemishini, i-petrochemical kanye neminye imikhakha.I-EN 10210icacisa ngokukhethekile amapayipi ensimbi angenamthungo wezakhiwo, phakathi kwawo i-BS EN 10210-1 iwukucaciswa okukhethekile kwezinsimbi zesakhiwo ezigoqelwe ngokushisayo ezingewona ama-alloy kanye nezinhlamvu ezicolisekile. Amabanga avamile kuleli zinga ahlanganisa i-S235GRH, S275JOH, S275J2H, S355JOH kanye ne-S355J2H.

Okokuqala, i-S235GRH iyinsimbi yebanga eliyisisekelo, esetshenziselwa ikakhulukazi izingxenye zesakhiwo ngaphansi kwengcindezi ephansi nendawo yokushisa yegumbi. Ngamandla okukhiqiza angu-235MPa, inokushisela okuhle nokubukeka okubandayo, futhi ifanele ukwakhiwa okujwayelekile kanye nezakhiwo zemishini.

Okulandelayo yi-S275JOH ne-S275J2H. I-S275JOH inokuqina okuhle kokuthi -20℃ namandla okukhiqiza angu-275MPa, futhi ivamise ukusetshenziselwa izakhiwo namaphrojekthi wamabhuloho anemithwalo ephakathi nendawo. I-S275J2H inokuqina komthelela okungcono ku- -20 ℃, futhi ifanele izingxenye zesakhiwo ezidinga isici sokuphepha esiphezulu.

I-S355JOHfuthiI-S355J2Hziyizinsimbi eziqinile. I-S355JOH inokuqina okuhle kakhulu kukho kokubili izinga lokushisa legumbi kanye nezinga lokushisa eliphansi (-20℃), enamandla okukhiqiza angu-355MPa, futhi isetshenziswa kabanzi kumaphrojekthi anengcindezi ephezulu namaphrojekthi wesakhiwo abalulekile, njengezakhiwo eziphakeme kakhulu namabhuloho amakhulu. I-S355J2H inokuqina komthelela okuphezulu kokuthi -20℃, futhi ifanele izindawo ezibandayo kakhulu noma amaphrojekthi adinga ukuqinisekiswa kokuphepha okwengeziwe.

Izinga le-EN 10210 alikucacisi nje kuphela ukwakheka kwamakhemikhali kanye nezakhiwo zemishini zamapayipi ensimbi, kodwa futhi libeka phambili izidingo ezithile zokubekezelela ubukhulu, ikhwalithi yangaphezulu, ukuhlolwa okungonakali, njll. Lokhu kuqinisekisa ukuvumelana nokuthembeka kwamapayipi ensimbi ngesikhathi sokukhiqiza kanye sebenzisa.

Amapayipi ensimbi angenamthungo akhiwa ubuchwepheshe bokugoqa obushisayo, obubanika izakhiwo ezinhle kakhulu zemishini kanye nokunemba okuhle kwe-dimensional. Inqubo yokushisa eshisayo ingaqeda ukucindezeleka ngaphakathi kwepayipi yensimbi, ithuthukise isakhiwo senhlangano yensimbi, futhi ithuthukise ukusebenza kwayo okuphelele. Uma kuqhathaniswa namapayipi ensimbi ashiselwe, amapayipi ensimbi angenamthungo anamandla aphakeme okucindezela, okugoba kanye ne-torsional, futhi afaneleka ukusekelwa kwesakhiwo kanye nokuthuthwa kwamanzi ngaphansi kwezimo ezihlukahlukene zokusebenza eziyinkimbinkimbi.

Ngokuvamile, amapayipi ensimbi angenamthungo akhiqizwa ngokuya ngamazinga we-EN 10210 akhombisa ukusebenza okuhle kakhulu emkhakheni wezokwakha nezimboni. Amapayipi ensimbi amabanga afana ne-S235GRH, S275JOH, S275J2H, S355JOH, ne-S355J2H anezici zawo futhi angahlangabezana nezidingo zamaphrojekthi ahlukahlukene. Ukusetshenziswa kwabo okubanzi akugcini nje ukuthuthukisa ikhwalithi nokuphepha kwamaphrojekthi, kodwa futhi kukhuthaza ukuthuthukiswa kanye nokusha kobuchwepheshe bezinto zensimbi. Ukukhetha amapayipi ensimbi angenamthungo wamabanga afanelekile kanye nokucaciswa kwawo kubalulekile ekuqinisekiseni ukuzinza kwesikhathi eside kanye nezinzuzo zezomnotho zamaphrojekthi.