I-API 5L ngokuvamile ibhekisela ekusetshenzisweni kwezinga lamapayipi kalayini, okungamapayipi asetshenziselwa ukuthutha uwoyela, isitimu, amanzi, njll. akhishwa phansi kuya kumabhizinisi ezimboni zikawoyela negesi yemvelo. Amapayipi olayini ahlanganisa amapayipi ensimbi angenamthungo namapayipi ensimbi ashiselwe. Njengamanje, izinhlobo zamapayipi ensimbi ashiselwe ngokuvamile asetshenziswa kumapayipi kawoyela e-China ahlanganisa ipayipi elishiselwe i-arc elishiselwe okugobile (SSAW), ipayipi elishiselwe i-arc longitudinal elingaphansi (LSAW), kanye nepayipi elishiselwe ukumelana nogesi (ERW). Amapayipi ensimbi omthungo ngokuvamile akhethwa lapho ububanzi bepayipi bungaphansi kuka-152mm.

Kunamabanga amaningi wezinto zokusetshenziswa zamapayipi ensimbi e-API 5L: GR.B, X42, X46, X52, X56, X60, X70, X80, njll. Manje izigayo ezinkulu zensimbi njenge-Baosteel sezithuthukise amabanga ensimbi we-X100, X120 pipeline steel. Amabanga ensimbi ahlukene amapayipi ensimbi anezidingo eziphakeme zezinto ezingavuthiwe kanye nokukhiqizwa, futhi okulingana nekhabhoni phakathi kwamabanga ensimbi ahlukene kulawulwa ngokuqinile.

Njengoba wonke umuntu azi nge-API 5L, kunamazinga amabili, i-PSL1 ne-PSL2. Nakuba kunomehluko owodwa wamagama, okuqukethwe yilawa mazinga amabili kuhluke kakhulu. Lokhu kufana nezinga le-GB/T9711.1.2.3. Bonke bakhuluma ngento eyodwa, kodwa izidingo zihluke kakhulu. Manje ngizokhuluma ngomehluko phakathi kwePSL1 nePSL2 kabanzi:

1. I-PSL isifinyezo sezinga lokucaciswa komkhiqizo. Izinga lokucaciswa komkhiqizo wepayipi lomugqa lihlukaniswe i-PSL1 ne-PSL2, kungashiwo ukuthi izinga lekhwalithi lihlukaniswe i-PSL1 ne-PSL2. I-PSL2 ingaphezulu kwePSL1. Lawa mazinga amabili okucaciswa awahlukile kuphela ezidingweni zokuhlola, kodwa futhi nasekubunjweni kwamakhemikhali kanye nezakhiwo zemishini. Ngakho-ke, lapho u-oda ngokuya nge-API 5L, imigomo yenkontileka ngeke ibonise kuphela izinkomba ezijwayelekile njengokucaciswa namabanga ensimbi. , Kufanele futhi ikhombise izinga lokucaciswa komkhiqizo, okungukuthi, i-PSL1 noma i-PSL2. I-PSL2 iqinile kune-PSL1 ezinkomba ezifana nokwakheka kwamakhemikhali, izakhiwo eziqinile, amandla omthelela, nokuhlola okungabhubhisi.

2, i-PSL1 ayidingi ukusebenza komthelela, i-PSL2 wonke amabanga ensimbi ngaphandle kwe-x80, isikali esigcwele esingu-0℃ inani elimaphakathi le-Akv: longitudinal ≥ 41J, transverse ≥ 27J. Ibanga lensimbi le-X80, isikali esigcwele esingu-0℃ inani elimaphakathi le-Akv: longitudinal ≥ 101J, eliphambene ≥ 68J.

3. Amapayipi kalayini kufanele ahlolwe umfutho wamanzi ngalinye ngalinye, futhi izinga alisho ukuvumela ukucindezela kwamanzi okungena endaweni yokuhlola okungonakalisi. Lona futhi umehluko omkhulu phakathi kwezinga le-API nezinga laseShayina. I-PSL1 ayidingi ukuhlolwa okungacekeleki phansi, i-PSL2 kufanele ibe ukuhlola okungacekeleki ngakunye ngakunye.