API 5Lngumgangatho wentsimbi yombhobho osetyenziselwa ukuthutha ioli, igesi yendalo kunye namanzi. Umgangatho ugubungela amabakala amaninzi ahlukeneyo ensimbi, apho i-X42 kunye ne-X52 ngamabakala amabini aqhelekileyo. Umahluko omkhulu phakathi kwe-X42 kunye ne-X52 ziimpawu zabo zomatshini, ngakumbi amandla esivuno kunye namandla okuqina.

X42: Ubuncinci amandla okuvelisa i-X42 yensimbi yombhobho yi-42,000 psi (290 MPa), kwaye amandla ayo anamandla avela kwi-60,000-75,000 psi (415-520 MPa). Umbhobho wensimbi womgangatho we-X42 usetyenziswa ngokubanzi kwiinkqubo zemibhobho ezinoxinzelelo oluphakathi kunye neemfuno zamandla, ezilungele ukuthutha imidiya efana ne-oyile, igesi yendalo kunye namanzi.

X52: Ubuncinci amandla okuvelisa i-X52 yensimbi yombhobho yi-52,000 psi (360 MPa), kwaye amandla okuqina avela kwi-66,000-95,000 psi (455-655 MPa). Xa kuthelekiswa ne-X42, i-X52 yomgangatho wepayipi yensimbi inamandla aphezulu kwaye ifanelekile kwiinkqubo zemibhobho ezinoxinzelelo oluphezulu kunye neemfuno zamandla.

Ngokwemeko yokuhanjiswa,API 5L umgangathoixela iimeko zonikezelo ezahlukeneyo zemibhobho yentsimbi engenamthungo kunye nemibhobho edityanisiweyo:

Umbhobho wentsimbi ongenamthungo (i-N state): I-N state ibhekiselele kwimeko yonyango oluqhelekileyo. Imibhobho yentsimbi engenamthungo iqhelekile phambi kokunikezelwa kwi-homogenize i-microstructure yombhobho wentsimbi, ngaloo ndlela iphucula iimpawu zayo zoomatshini kunye nokuqina. Ukulungelelanisa kunokuphelisa uxinzelelo olushiyekileyo kunye nokuphucula ukuzinza kwe-dimensional yombhobho wensimbi.

Umbhobho odibeneyo (i-M state): I-M state ibhekisela kunyango lwe-thermomechanical yombhobho odibeneyo emva kokuqulunqa kunye ne-welding. Ngonyango lwe-thermomechanical, i-microstructure yombhobho odibeneyo iphuculwe, ukusebenza kwendawo ye-welding kuphuculwe, kwaye amandla kunye nokuthembeka kombhobho odibeneyo ngexesha lokusetyenziswa kuqinisekiswa.

API 5L umgangathoichaza ngokweenkcukacha ukwakheka kweekhemikhali, iipropati zoomatshini, iindlela zokuvelisa, ukuhlolwa kunye neemfuno zovavanyo lwemibhobho yentsimbi yombhobho. Ukuphunyezwa komgangatho kuqinisekisa ukhuseleko kunye nokuthembeka kwemibhobho yentsimbi yombhobho xa uthutha ioli, igesi yendalo kunye nolunye ulwelo. Ukukhethwa kwamabakala afanelekileyo emibhobho yensimbi kunye nesimo sokuhanjiswa kunokuhlangabezana neemfuno ezithile zeeprojekthi zobunjineli ezahlukeneyo kunye nokuqinisekisa ukusebenza okuzinzile kwenkqubo yombhobho.