I-API 5L ngokubanzi ibhekiselele kumgangatho wokuphunyezwa kwemibhobho yomgca, eyimibhobho esetyenziselwa ukuthutha ioli, umphunga, amanzi, njl. Imibhobho yomgca ibandakanya imibhobho yentsimbi engenamthungo kunye nemibhobho yentsimbi edityanisiweyo. Okwangoku, iintlobo zemibhobho yentsimbi esetyenziswa ngokuqhelekileyo kwimibhobho yeoli e-China ibandakanya umbhobho odityanisiweyo we-arc odityanisiweyo (SSAW), umbhobho odityanisiweyo we-arc we-longitudinal (LSAW), kunye nombhobho odityanisiweyo wombane (ERW). Imibhobho yentsimbi yomthungo ikhethwa ngokubanzi xa i-diameter yombhobho ingaphantsi kwe-152mm.

Kukho amabakala amaninzi ezinto ezikrwada ze-API 5L imibhobho yentsimbi: GR.B, X42, X46, X52, X56, X60, X70, X80, njl. Ngoku amashishini amakhulu ensimbi afana ne-Baosteel aphuhlise amanqanaba entsimbi ye-X100, i-X120 yentsimbi yombhobho. Iindidi ezahlukeneyo zetsimbi zeemibhobho zetsimbi zineemfuno eziphezulu zezinto eziluhlaza kunye nemveliso, kwaye i-carbon equivalent phakathi kwamabakala ahlukeneyo ensimbi ilawulwa ngokungqongqo.

Njengoko wonke umntu uyazi malunga ne-API 5L, kukho imigangatho emibini, i-PSL1 kunye ne-PSL2. Nangona kukho umahluko wegama elinye kuphela, umxholo wale migangatho mibini wahluke kakhulu. Oku kufana nomgangatho we-GB/T9711.1.2.3. Bonke bathetha ngento enye, kodwa iimfuno zahluke kakhulu. Ngoku ndiza kuthetha ngomahluko phakathi kwePSL1 kunye nePSL2 ngokweenkcukacha:

1. I-PSL sisishunqulelo senqanaba lokucaciswa kwemveliso. Umgangatho wokuchazwa kwemveliso yombhobho womgca uhlukaniswe kwi-PSL1 kunye ne-PSL2, kunokuthiwa kwakhona ukuba umgangatho womgangatho uhlukaniswe kwi-PSL1 kunye ne-PSL2. I-PSL2 iphezulu kunePSL1. Ezi zigaba zimbini zokucaciswa azifani kuphela kwiimfuno zokuhlola, kodwa kunye nokubunjwa kweekhemikhali kunye neempawu zomatshini. Ngoko ke, xa u-odola ngokwe-API 5L, imimiselo kwikhontrakthi ayiyi kubonisa kuphela izikhombisi eziqhelekileyo ezifana neenkcukacha kunye namabakala ensimbi. , Kufuneka kwakhona ibonise umgangatho wokuchazwa kwemveliso, oko kukuthi, i-PSL1 okanye i-PSL2. I-PSL2 ingqongqo kune-PSL1 kwizalathisi ezifana nokwakheka kweekhemikhali, iipropathi zokuqina, amandla empembelelo, kunye novavanyo olungonakalisi.

I-2, i-PSL1 ayifuni ukusebenza kwempembelelo, i-PSL2 onke amabakala ensimbi ngaphandle kwe-x80, i-full-scale 0℃ Akv ixabiso eliphakathi: longitudinal ≥ 41J, transverse ≥ 27J. X80 ibakala steel, isikali epheleleyo 0℃ Akv ixabiso avareji: longitudinal ≥ 101J, transverse ≥ 68J.

3. Imibhobho yomgca kufuneka ifakwe kuvavanyo loxinzelelo lwamanzi nganye nganye, kwaye umgangatho awuchazi ukuvumela uxinzelelo lwamanzi endaweni yovavanyo olungonakalisi. Lo ngumahluko omkhulu phakathi komgangatho we-API kunye nomgangatho waseTshayina. I-PSL1 ayifuni ukuhlolwa okungonakalisiyo, i-PSL2 kufuneka ibe luhlolo olungonakalisi nganye nganye.