API 5L inowanzo reva mwero wekushandiswa kwemapaipi emugero, ayo ari mapaipi anoshandiswa kutakura oiri, utsi, mvura, nezvimwewo, anotorwa kubva pasi kuenda kumabhizinesi emafuta negasi rechisikigo. Mapaipi emugero anosanganisira mapaipi esimbi asina musono uye mapaipi esimbi akasungirirwa. Parizvino, mhando dzemapaipi esimbi akasungirirwa anoshandiswa zvakanyanya mumapaipi emafuta muChina dzinosanganisira spiral immersed arc welded pipe (SSAW), longitudinal immersed arc welded pipe (LSAW), uye electric resistance welded pipe (ERW). Mapaipi esimbi ane mugero anowanzo sarudzwa kana dhayamita yepombi iri pasi pe152mm.

Kune mhando dzakawanda dzezvinhu zvakagadzirwa zvemapaipi esimbi eAPI 5L: GR.B, X42, X46, X52, X56, X60, X70, X80, nezvimwewo. Iye zvino mafekitori makuru esimbi akadai seBaosteel agadzira mhando dzesimbi dzemapaipi esimbi eX100, X120. Mhando dzakasiyana dzesimbi dzemapaipi esimbi dzine zvinodiwa zvakanyanya zvezvinhu zvakagadzirwa uye kugadzirwa, uye kabhoni yakaenzana pakati pemhando dzakasiyana dzesimbi inodzorwa zvakasimba.

Sekuziva kunoita munhu wese nezve API 5L, kune zviyero zviviri, PSL1 nePSL2. Kunyangwe paine musiyano wemazwi mumwe chete, zviri mukati mezvirevo zviviri izvi zvakasiyana zvikuru. Izvi zvakafanana ne GB/T9711.1.2.3 standard. Dzese dzinotaura nezvechinhu chimwe chete, asi zvinodiwa zvakasiyana zvikuru. Iye zvino ndichataura nezvemusiyano uripo pakati pePSL1 nePSL2 zvakadzama:

1. PSL ipfupiso yedanho rezvinotsanangurwa zvechigadzirwa. Danho rezvinotsanangurwa zvechigadzirwa chepombi yemutsara rakakamurwa kuita PSL1 nePSL2, zvinogonawo kutaurwa kuti huwandu hwemhando hwakakamurwa kuita PSL1 nePSL2. PSL2 yakakwira kupfuura PSL1. Aya mazinga maviri ezvinotsanangurwa haasi akasiyana chete muzvinodiwa zvekuongorora, asiwo mukugadzirwa kwemakemikari uye hunhu hwemakanika. Saka, pakuraira zvinoenderana neAPI 5L, mazwi ari muchibvumirano haangoratidze zviratidzo zvakajairika senge zvirevo uye mamakisi esimbi. , Inofanirawo kuratidza huwandu hwezvinotsanangurwa zvechigadzirwa, kureva, PSL1 kana PSL2. PSL2 yakaoma kupfuura PSL1 muzviratidzo zvakaita sekugadzirwa kwemakemikari, hunhu hwetensile, simba remhedzisiro, uye kuyedzwa kusingaparadze.

2, PSL1 haidi mashandiro esimba, PSL2 magiredhi ese esimbi kunze kwe x80, avhareji ye 0℃ Akv yehukuru hwakazara: longitudinal ≥ 41J, transverse ≥ 27J. X80 simbi giredhi, avhareji ye 0℃ Akv yehukuru hwakazara: longitudinal ≥ 101J, transverse ≥ 68J.

3. Mapaipi emugero anofanira kuyedzwa kumanikidzwa kwemvura rimwe nerimwe, uye mutemo haubvumidze kuti kumanikidzwa kwemvura kudzoserwe panzvimbo pemuedzo usingaparadze. Uyu musiyano mukuru pakati pemutemo weAPI nemutemo weChinese. PSL1 haidi kuongororwa kusingaparadze, PSL2 inofanira kuongororwa kusingaparadze rimwe nerimwe.