API 5L nthawi zambiri imatanthawuza kukhazikitsidwa kwa mapaipi amzere, omwe ndi mapaipi omwe amagwiritsidwa ntchito kunyamula mafuta, nthunzi, madzi, ndi zina zotere zochotsedwa pansi kupita kumakampani amafuta ndi gasi.Mipope mizere monga zitsulo mipope ndi welded zitsulo mapaipi.Pakadali pano, mitundu yomwe imagwiritsidwa ntchito kwambiri pamipope yamafuta ku China imaphatikizapo chitoliro chozungulira cha arc welded (SSAW), chitoliro chotalikirapo cha arc welded (LSAW), ndi chitoliro chotchinga chamagetsi (RW).Msoko mapaipi zitsulo zambiri amasankhidwa pamene chitoliro awiri ndi zosakwana 152mm.

Pali magulu ambiri a zipangizo API 5L zitsulo mapaipi: GR.B, X42, X46, X52, X56, X60, X70, X80, etc. Tsopano mphero zazikulu zitsulo ngati Baosteel apanga zitsulo giredi X100, X120 pipeline zitsulo.Zosiyanasiyana zitsulo mipope zitsulo ndi zofunika apamwamba kwa zipangizo ndi kupanga, ndi ofanana mpweya pakati kalasi osiyana zitsulo ndi mosamalitsa.

Monga aliyense akudziwa za API 5L, pali miyezo iwiri, PSL1 ndi PSL2.Ngakhale pali kusiyana kwa mawu amodzi, zomwe zili mumiyezo iwiriyi ndizosiyana kwambiri.Izi zikufanana ndi muyezo wa GB/T9711.1.2.3.Onse amalankhula za chinthu chimodzi, koma zofunikira ndizosiyana kwambiri.Tsopano ndikamba za kusiyana kwa PSL1 ndi PSL2 mwatsatanetsatane:

1. PSL ndi chidule cha mlingo specifications mankhwala.Mlingo wamtundu wa chitoliro chamzere umagawidwa mu PSL1 ndi PSL2, tinganenenso kuti mulingo wamtunduwu umagawidwa kukhala PSL1 ndi PSL2.PSL2 ndiyokwera kuposa PSL1.Magawo awiriwa amasiyana mosiyana ndi zofunikira zoyendera, komanso muzopanga mankhwala ndi makina.Chifukwa chake, poyitanitsa molingana ndi API 5L, mawu omwe ali mumgwirizanowo samangowonetsa zizindikilo zanthawi zonse monga mafotokozedwe ndi magiredi achitsulo., Ayeneranso kusonyeza mlingo specifications mankhwala, ndiye, PSL1 kapena PSL2.PSL2 ndi yolimba kuposa PSL1 pazizindikiro monga kapangidwe ka mankhwala, zinthu zolimba, mphamvu zowononga, komanso kuyesa kosawononga.

2, PSL1 safuna zotsatira zotsatira, PSL2 zitsulo giredi onse kupatula x80, zonse 0℃ Akv pafupifupi mtengo: longitudinal ≥ 41J, yopingasa ≥ 27J.X80 zitsulo kalasi, zonse 0℃ Akv pafupifupi mtengo: kotalika ≥ 101J, yopingasa ≥ 68J.

3. Mapaipi amizere amayenera kuyesedwa m'modzi ndi m'modzi, ndipo muyezowo suloleza kuthamanga kwa madzi m'malo osawononga.Ichinso ndi kusiyana kwakukulu pakati pa API muyezo ndi Chinese muyezo.PSL1 sifunika kuyendera mosawononga, PSL2 iyenera kukhala yoyendera mosawononga imodzi ndi imodzi.