I-API 5Liyindinganiso yepayipi yensimbi esetshenziselwa ukuthutha uwoyela, igesi yemvelo, namanzi. Izinga lihlanganisa amamaki ensimbi amaningana ahlukene, okuthi i-X42 ne-X52 ingamabanga amabili avamile. Umehluko omkhulu phakathi kwe-X42 ne-X52 yizinto zabo zokusebenzisa imishini, ikakhulukazi amandla esivuno namandla aqinile.

X42: Amandla amancane esivuno sepayipi lensimbi le-X42 ngu-42,000 psi (290 MPa), futhi amandla alo aqinile asukela ku-60,000-75,000 psi (415-520 MPa). Ipayipi lensimbi le-X42 grade ngokuvamile lisetshenziswa ezinhlelweni zamapayipi anezimfuneko zokucindezela okumaphakathi namandla, alungele ukuthutha imidiya efana nowoyela, igesi yemvelo, namanzi.

X52: Amandla amancane okukhiqiza wepayipi lensimbi le-X52 ngu-52,000 psi (360 MPa), futhi amandla aqinile asukela ku-66,000-95,000 psi (455-655 MPa). Uma kuqhathaniswa ne-X42, ipayipi lensimbi lezinga le-X52 linamandla aphezulu futhi lilungele amasistimu amapayipi anezimfuneko eziphezulu zokucindezela namandla.

Mayelana nesimo sokudiliva,I-API 5L ejwayelekileicacisa izimo ezihlukene zokulethwa kwamapayipi ensimbi angenamthungo namapayipi ashiselwe:

Ipayipi lensimbi engenamthungo (isifunda esingu-N): Isimo sika-N sisho isimo sokwelashwa esijwayelekile. Amapayipi ensimbi angenamthungo ajwayelekile ngaphambi kokulethwa ukuze enze i-microstructure yepayipi lensimbi ibe ngcono, ngaleyo ndlela ithuthukise izakhiwo zayo zemishini nokuqina. Ukulinganisa kungaqeda ukucindezeleka okusele futhi kuthuthukise ukuzinza kwe-dimensional yepayipi yensimbi.

Ipayipi elishiselwe (i-M state): I-M state ibhekisela ekwelapheni kwe-thermomechanical yepayipi elishiselwe ngemva kokwakhiwa nokushisela. Ngokwelashwa kwe-thermomechanical, i-microstructure yepayipi ehlanganisiwe ithuthukisiwe, ukusebenza kwendawo yokushisela kuyathuthukiswa, futhi amandla nokuthembeka kwepayipi elihlanganisiwe ngesikhathi sokusetshenziswa kuqinisekiswa.

I-API 5L ejwayelekileicacisa ngokuningiliziwe ukwakheka kwamakhemikhali, izakhiwo zemishini, izindlela zokukhiqiza, ukuhlolwa kanye nezidingo zokuhlola zamapayipi ensimbi. Ukuqaliswa kwaleli zinga kuqinisekisa ukuphepha nokuthembeka kwamapayipi ensimbi epayipi lapho ethutha uwoyela, igesi yemvelo kanye nolunye uketshezi. Ukukhethwa kwamabanga afanelekile amapayipi ensimbi kanye nesimo sokulethwa kungahlangabezana nezidingo ezithile zamaphrojekthi wobunjiniyela ahlukene futhi kuqinisekise ukusebenza okuzinzile kwesistimu yamapayipi.