API 5Lndi muyezo wa zitsulo mzere chitoliro ntchito kunyamula mafuta, gasi, ndi madzi. Muyezo umakwirira magulu angapo achitsulo, omwe X42 ndi X52 ndi magiredi awiri wamba. Kusiyanitsa kwakukulu pakati pa X42 ndi X52 ndi makina awo, makamaka mphamvu zokolola ndi mphamvu zamakokedwe.

x42: Mphamvu zochepa zokolola za chitoliro chachitsulo cha X42 ndi 42,000 psi (290 MPa), ndipo mphamvu zake zowonongeka zimachokera ku 60,000-75,000 psi (415-520 MPa). Chitoliro chachitsulo cha X42 nthawi zambiri chimagwiritsidwa ntchito m'mapaipi omwe ali ndi mphamvu zapakatikati ndi zofunikira zamphamvu, zoyenera kunyamula media monga mafuta, gasi, ndi madzi.

X52: Mphamvu zochepa zokolola za chitoliro chachitsulo cha X52 ndi 52,000 psi (360 MPa), ndipo mphamvu zowonongeka zimachokera ku 66,000-95,000 psi (455-655 MPa). Poyerekeza ndi X42, X52 kalasi zitsulo chitoliro ali ndi mphamvu apamwamba ndi oyenera kachitidwe mapaipi ndi kuthamanga apamwamba ndi zofunika mphamvu.

Pankhani ya kutumiza,API 5L muyezoimatchula mitundu yosiyanasiyana yobweretsera mapaipi achitsulo opanda msoko ndi mapaipi owotcherera:

Seamless zitsulo chitoliro (N boma): N boma amatanthauza normalizing mankhwala boma. Msokonezo zitsulo mipope ndi normalized pamaso yobereka kuti homogenize ndi microstructure wa zitsulo chitoliro, potero kuwongolera mawotchi katundu ndi toughness. Normalizing amatha kuthetsa nkhawa yotsalira ndikuwongolera kukhazikika kwapaipi yachitsulo.

Welded chitoliro (M boma): M boma amatanthauza mankhwala thermomechanical wa welded chitoliro pambuyo kupanga ndi kuwotcherera. Kupyolera mu chithandizo cha thermomechanical, microstructure ya welded chitoliro ndi wokometsedwa, ntchito ya malo kuwotcherera bwino, ndipo mphamvu ndi kudalirika kwa welded chitoliro pa ntchito zimatsimikiziridwa.

API 5L muyezoimafotokoza mwatsatanetsatane kapangidwe kake, mawonekedwe amakanika, njira zopangira, kuyang'anira ndi kuyesa zofunikira zamapaipi achitsulo. Kukhazikitsidwa kwa muyezo kumatsimikizira chitetezo ndi kudalirika kwa mapaipi azitsulo zapaipi ponyamula mafuta, gasi ndi madzi ena. Kusankhidwa kwa magiredi oyenerera a mapaipi achitsulo ndi mawonekedwe operekera amatha kukwaniritsa zosowa zenizeni zamapulojekiti osiyanasiyana aukadaulo ndikuwonetsetsa kuti dongosolo la mapaipi likugwira ntchito mokhazikika.