I-API 5L ngokubanzi ibhekisa kumgangatho wokusetyenziswa kwemibhobho yomgca, eyimibhobho esetyenziselwa ukuthutha ioyile, umphunga, amanzi, njl.njl. ekhutshwa emhlabeni ukuya kumashishini e-oyile negesi yendalo. Imibhobho yomgca iquka imibhobho yentsimbi engenamthungo kunye nemibhobho yentsimbi edibeneyo. Okwangoku, iintlobo zemibhobho yentsimbi edibeneyo esetyenziswa rhoqo kwimibhobho yeoyile eTshayina ziquka umbhobho we-spiral submerged arc welded (SSAW), umbhobho we-longitudinal submerged arc welded (LSAW), kunye nombhobho we-electric resistance welded (ERW). Imibhobho yentsimbi yomthungo ikhethwa ngokubanzi xa ububanzi bombhobho bungaphantsi kwe-152mm.

Kukho amanqanaba amaninzi ezinto ezikrwada zeepayipi zentsimbi ze-API 5L: GR.B, X42, X46, X52, X56, X60, X70, X80, njl. Ngoku iifektri ezinkulu zentsimbi ezifana neBaosteel ziphuhlise amanqanaba entsimbi kwisinyithi sepayipi se-X100, X120. Amanqanaba ahlukeneyo entsimbi yeepayipi zentsimbi aneemfuno eziphezulu zezinto ezikrwada kunye nemveliso, kwaye ixabiso lekhabhoni elilinganayo phakathi kwamanqanaba ahlukeneyo entsimbi lilawulwa ngokungqongqo.

Njengoko wonke umntu esazi nge-API 5L, kukho imigangatho emibini, i-PSL1 kunye ne-PSL2. Nangona kukho umahluko omnye wamagama, umxholo wale migangatho mibini wahlukile kakhulu. Oku kufana nomgangatho we-GB/T9711.1.2.3. Zonke zithetha ngento enye, kodwa iimfuno zahlukile kakhulu. Ngoku ndiza kuthetha ngomahluko phakathi kwe-PSL1 kunye ne-PSL2 ngokweenkcukacha:

1. I-PSL sisifinyezo senqanaba lenkcazo yemveliso. Inqanaba lenkcazo yemveliso yombhobho womgca lahlulwe laba yi-PSL1 kunye ne-PSL2, kunokuthiwa nenqanaba lomgangatho lahlulwe laba yi-PSL1 kunye ne-PSL2. I-PSL2 iphezulu kune-PSL1. La manqanaba mabini enkcazo awahlukanga nje kuphela kwiimfuno zokuhlolwa, kodwa nakwizinto ezidityanisiweyo zeekhemikhali kunye neempawu zoomatshini. Ke ngoko, xa u-odola ngokwe-API 5L, imiqathango kwisivumelwano ayizukubonisa kuphela izalathisi eziqhelekileyo ezifana neenkcazo kunye neeklasi zentsimbi. , Kufuneka ibonise nenqanaba lenkcazo yemveliso, oko kukuthi, i-PSL1 okanye i-PSL2. I-PSL2 ingqongqo kune-PSL1 kwizalathisi ezifana nokwakheka kweekhemikhali, iimpawu zokutsalwa, amandla empembelelo, kunye novavanyo olungonakalisiyo.

2, i-PSL1 ayifuni ukusebenza kakuhle, i-PSL2 zonke iiklasi zentsimbi ngaphandle kwe-x80, ixabiso eliphakathi le-0℃ Akv elipheleleyo: ubude obude ≥ 41J, obunqamlezileyo ≥ 27J. Inqanaba lentsimbi ye-X80, ubungakanani obupheleleyo be-0℃ Akv eliphakathi: ubude obude ≥ 101J, obunqamlezileyo ≥ 68J.

3. Imibhobho yomgca kufuneka ivavanywe uxinzelelo lwamanzi nganye nganye, kwaye umgangatho awuchazi ukuba kufuneka kusetyenziswe uvavanyo olungonakalisiyo, olu tshintsho lukwangumahluko omkhulu phakathi komgangatho we-API kunye nomgangatho waseTshayina. I-PSL1 ayifuni kuhlolwa okungonakalisiyo, i-PSL2 kufuneka ihlolwe okungonakalisiyo nganye nganye.