API 5L kazhinji inoreva chiyero chekushandiswa kwemapombi emutsetse, ari mapaipi anoshandiswa kutakura oiri, chiutsi, mvura, nezvimwe. Mitsetse mapaipi zvinosanganisira musono simbi pombi uye welded simbi pombi. Parizvino, anowanzo shandiswa welded simbi pombi mhando mumapaipi emafuta muChina anosanganisira spiral submerged arc welded pombi (SSAW), longitudinal submerged arc welded pombi (LSAW), uye yemagetsi kuramba welded pombi (ERW). Seam simbi mapaipi anowanzo kusarudzwa kana pombi dhayamita isingasviki 152mm.

Pane magiredhi akawanda ezvigadzirwa zvepi 5L simbi mapaipi: GR.B, X42, X46, X52, X56, X60, X70, X80, nezvimwewo. Iye zvino zvigayo zvihombe zvesimbi seBaosteel zvakagadzira mamakisi esimbi eX100, X120 pipeline simbi. Yakasiyana simbi mamakisi emapombi esimbi ane yakakwirira zvinodiwa pambishi uye kugadzira, uye iyo kabhoni yakaenzana pakati peakasiyana simbi mamakisi inodzorwa zvakanyanya.

Sekuziva kwemunhu wese nezve API 5L, pane zviyero zviviri, PSL1 uye PSL2. Kunyangwe paine musiyano wezwi rimwe chete, zviri mukati mezviyero zviviri izvi zvakasiyana zvakanyanya. Izvi zvakafanana neGB/T9711.1.2.3 chiyero. Vose vanotaura pamusoro pechinhu chimwe, asi zvinodiwa zvakasiyana zvikuru. Zvino ndichataura nezve musiyano uripo pakati pePSL1 nePSL2 zvakadzama:

1. PSL ndicho chidimburidzo chedanho rekutsanangurwa kwechigadzirwa. Iyo yechigadzirwa yekumisikidzwa nhanho yemutsetse pombi yakakamurwa kuita PSL1 uye PSL2, zvinogona zvakare kutaurwa kuti nhanho yemhando yakakamurwa kuita PSL1 uye PSL2. PSL2 yakakwirira kudarika PSL1. Aya mazinga maviri ekutsanangurwa haana kungosiyana chete mune zvinodiwa zvekuongorora, asiwo mukugadzirwa kwemakemikari uye michina. Naizvozvo, kana uchiraira maererano ne API 5L, mazwi ari muchibvumirano haangoratidzi zviratidzo zvakajairwa senge zvakatemwa uye simbi mamakisi. , Inofanirawo kuratidza chiyero chechigadzirwa, kureva, PSL1 kana PSL2. PSL2 yakaomarara kupfuura PSL1 muzviratidzo zvakaita sekuumbwa kwemakemikari, tensile zvivakwa, simba rekuita, uye kuyedza kusiri kuparadza.

2, PSL1 haidi kukanganisa kuita, PSL2 ese simbi mamakisi kunze kwex80, yakazara-chiyero 0℃ Akv avhareji kukosha: longitudinal ≥ 41J, transverse ≥ 27J. X80 simbi giredhi, yakazara-chiyero 0 ℃ Akv avhareji kukosha: longitudinal ≥ 101J, mhiri ≥ 68J.

3. Mapombi emutsetse anofanirwa kuedzwa kudzvanywa kwemvura imwe neimwe, uye chiyero hachirevi kubvumira kusaparadza bvunzo inotsiva kumanikidza kwemvura. Uyu zvakare mutsauko mukuru pakati peiyo API chiyero uye yeChinese standard. PSL1 haidi kuongororwa kusingaparadze, PSL2 inofanira kunge isiri-inoparadza yekuongorora imwe neimwe.