API 5L gabaɗaya yana nufin ma'aunin aiwatarwa don bututun ƙarfe na bututun, wanda ya haɗa da manyan rukuni biyu:bututun ƙarfe marasa sumulkumabututun ƙarfe da aka weldedA halin yanzu, nau'ikan bututun ƙarfe da aka fi amfani da su a cikin bututun mai sunebututun da aka welded na karkace a ƙarƙashin ruwa(Bututun SSAW),bututun bututun da aka welded a tsaye a ƙarƙashin ruwa(LSAW PIPE), da kumabututun welded na juriya na lantarki(ERW). Yawanci ana zaɓar bututun ƙarfe marasa sumul idan diamita na bututun bai wuce 152mm ba.
An ƙirƙiro ma'aunin ƙasa na GB/T 9711-2011, Bututun Karfe don Tsarin Sufuri na Bututu a Masana'antun Man Fetur da Iskar Gas, bisa ga API 5L.
GB/T 9711-2011 ya ƙayyade buƙatun masana'antu don bututun ƙarfe marasa matsala da walda da ake amfani da su a cikin tsarin jigilar bututun mai da iskar gas, wanda ya ƙunshi matakai biyu na ƙayyadaddun samfura (PSL1 da PSL2). Saboda haka, wannan ƙa'ida ta shafi bututun ƙarfe marasa matsala da walda kawai don watsa mai da iskar gas kuma ba ta shafi bututun ƙarfe ba.
Karfe maki
Bututun ƙarfe na API 5L suna amfani da nau'ikan kayan masarufi daban-daban, ciki har da GR.B, X42, X46, X52, X56, X60, X70, X80, da sauransu. An riga an ƙirƙiro ƙarfe masu nau'ikan X100 da X120. Ma'aunin ƙarfe daban-daban yana sanya buƙatu daban-daban ga kayan aiki da hanyoyin samarwa.
Matakan Inganci
A cikin ma'aunin API 5L, ingancin ƙarfen bututun ana rarraba shi azaman PSL1 ko PSL2. PSL yana nufin Matsayin Bayanin Samfura.
PSL1 ta ƙayyade buƙatun inganci na gaba ɗaya ga ƙarfen bututun mai; PSL2 ta ƙara buƙatun da ake buƙata don haɗakar sinadarai, tauri mai kyau, halayen ƙarfi, da ƙarin gwajin NDE.
Lokacin Saƙo: Satumba-01-2025
