Muyezo wa API 5L wosasunthika wa chitoliro chachitsulo ndi ndondomeko yopangidwa ndi American Petroleum Institute (API) ndipo imagwiritsidwa ntchito makamaka pamapaipi amafuta ndi gasi. API 5L mapaipi achitsulo osasunthika amagwiritsidwa ntchito kwambiri potengera mafuta, gasi, madzi ndi zakumwa zina chifukwa cha mphamvu zawo komanso kukana dzimbiri. Zotsatirazi ndizofotokozera za zipangizo zosiyanasiyana za API 5L muyezo ndi mawonekedwe awo ogwiritsira ntchito, njira zopangira ndi kuyendera fakitale.

Zakuthupi
API 5L Gr.B, API 5L Gr.B X42, API 5L Gr.B X52, API 5L Gr.B X60, API 5L Gr.B X65, API 5L Gr.B X70

Njira yopanga
Njira yopanga API 5L chitoliro chopanda chitsulo chimaphatikizapo izi:

Kusankha zakuthupi: Sankhani zitsulo zamtengo wapatali, nthawi zambiri zitsulo za carbon kapena low-alloy steel.
Kutenthetsa ndi kuboola: Billet imatenthedwa kutentha koyenera ndiyeno bowo la chubu limapangidwa kudzera pamakina oboola.
Kugudubuzika kotentha: Bowo la chubu la hollow limakonzedwanso pa mphero yotentha kuti ipange chitoliro chofunikira komanso makulidwe a khoma.
Chithandizo cha kutentha: Kuwotcha kapena kuzimitsa ndi kutenthetsa chitoliro chachitsulo kuti chiwongolere makina ake.
Kujambula kozizira kapena kugudubuza kozizira: Kujambula kozizira kapena kugudubuza kozizira kumachitidwa monga momwe amafunira kuti akwaniritse kulondola kwapamwamba komanso mawonekedwe apamwamba.
Kuyendera kwafakitale
API 5L mapaipi achitsulo osasunthika amayenera kuyang'aniridwa mosamalitsa asanachoke kufakitale kuti atsimikizire kuti akukwaniritsa zofunikira:

Kusanthula kwa Chemical: Dziwani momwe chitoliro chachitsulo chimapangidwira kuti muwonetsetse kuti chikugwirizana ndi zomwe zanenedwa.
Kuyesa kwamakina: Kuphatikizira kulimba kwamphamvu, kulimba kwapang'onopang'ono komanso kuyesa kwakutali.
Kuyesa kosawononga: Gwiritsani ntchito kuzindikira zolakwika za akupanga ndi kuyesa kwa X-ray kuti muwone zolakwika zamkati za chitoliro chachitsulo.
Kuzindikira kukula: Onetsetsani kuti m'mimba mwake, makulidwe a khoma ndi kutalika kwa chitoliro chachitsulo zimakwaniritsa zofunikira.
Kuyesa kwa Hydrostatic: Chitani mayeso a hydrostatic pa chitoliro chachitsulo kuti mutsimikizire chitetezo chake ndi kudalirika pogwira ntchito.
Chidule
API 5L mapaipi achitsulo osasunthika amagwiritsidwa ntchito kwambiri pamayendedwe amafuta ndi gasi chifukwa champhamvu zawo, kukana kwa dzimbiri komanso makina abwino amakina. Mapaipi achitsulo a API 5L amitundu yosiyanasiyana ndi oyenera kupsinjika ndi chilengedwe, kukwaniritsa zosowa zamitundu yosiyanasiyana yogwirira ntchito. Njira zopangira zolimba komanso kuwunika kwa fakitale zimatsimikizira kuti mapaipi azitsulo amapangidwa bwino komanso amagwira ntchito bwino, kupereka chitsimikizo cha njira yoyendetsera bwino komanso yotetezeka.