API 5Lndiyo chiyero chesimbi mutsetse pombi inoshandiswa kutakura mafuta, gasi rechisikigo, uye mvura. Iyo chiyero inovhara akati wandei magiredhi esimbi, ayo X42 uye X52 ari maviri akajairika mamakisi. Musiyano mukuru pakati peX42 neX52 ndiwo maitiro avo emuchina, kunyanya kusimba kwegoho uye kusimba kwesimba.

X42: Iko kuderera kwegoho simba re X42 simbi pombi ndeye 42,000 psi (290 MPa), uye simba rayo rekusimba rinobva ku60,000-75,000 psi (415-520 MPa). X42 giredhi simbi pombi inowanzo shandiswa mumapombi masisitimu ane epakati kudzvanywa uye simba zvinodiwa, akakodzera kutakura midhiya yakaita semafuta, gasi rechisikigo, uye mvura.

X52: Iko kuderera kwegoho simba re X52 simbi pombi ndeye 52,000 psi (360 MPa), uye simba rekusimba rinobva ku66,000-95,000 psi (455-655 MPa). Kana ichienzaniswa neX42, X52 giredhi simbi pombi ine simba rakakwirira uye inokodzera pombi masisitimu ane kudzvinyirirwa kwepamusoro uye zvinodiwa nesimba.

Panyaya yekutumira mamiriro,API 5L yakajairikainotsanangura zvakasiyana-siyana zvekutumira mapaipi asina musono mapaipi uye welded pombi:

Seamless simbi pombi (N state): N state inoreva kujaira kurapwa mamiriro. Mapaipi esimbi asina musono anogadziriswa asati atumirwa kuti aite homogenize iyo microstructure yepombi yesimbi, nekudaro inovandudza michina yayo uye kuoma. Normalizing inogona kubvisa zvakasara kushushikana uye kugadzirisa dimensional kugadzikana kwepombi yesimbi.

Welded pombi (M state): M state inoreva thermomechanical kurapwa kwe welded pombi mushure mekugadzira uye welding. Kuburikidza nekurapa kwe thermomechanical, iyo microstructure ye welded pombi inogadziriswa, kushanda kwenzvimbo yewelding kunovandudzwa, uye simba uye kuvimbika kwepombi yakashongedzwa panguva yekushandiswa inosimbiswa.

API 5L yakajairikainotsanangura zvakadzama kuumbwa kwemakemikari, zvivakwa zvemuchina, nzira dzekugadzira, kuongorora uye bvunzo zvinodiwa zvepombi simbi pombi. Kuitwa kweiyo chiyero kunovimbisa kuchengetedzwa uye kuvimbika kwepombi simbi pombi pakutakura oiri, gasi rechisikigo uye zvimwe zvinwiwa. Kusarudzwa kwemagiredhi akakodzera emapombi esimbi uye mamiriro ekutumira anogona kusangana nezvinodiwa zveinjiniya mapurojekiti akasiyana uye kuve nechokwadi chekushanda kwakagadzikana kwepombi system.