API 5Lke tekanyetso ea phala ea tšepe e sebelisoang ho tsamaisa oli, khase ea tlhaho le metsi.Tekanyetso e akaretsa limaraka tse 'maloa tse fapaneng tsa tšepe, tseo X42 le X52 e leng limaraka tse peli tse tloaelehileng.Phapang e kholo pakeng tsa X42 le X52 ke thepa ea bona ea mochine, haholo-holo matla a ho hlahisa le matla a tsitsitseng.

X42: Matla a fokolang a lihlahisoa a phala ea tšepe ea X42 ke 42,000 psi (290 MPa), 'me matla a eona a matla a tloha ho 60,000-75,000 psi (415-520 MPa).Pipe ea tšepe ea sehlopha sa X42 hangata e sebelisoa lits'ebetsong tsa liphaephe tse nang le khatello e mahareng le litlhoko tsa matla, tse loketseng ho tsamaisa mecha ea litaba joalo ka oli, khase ea tlhaho le metsi.

X52: Matla a fokolang a lihlahisoa a phala ea tšepe ea X52 ke 52,000 psi (360 MPa), 'me matla a matla a tloha ho 66,000-95,000 psi (455-655 MPa).Ha ho bapisoa le X42, phala ea tšepe ea X52 e na le matla a holimo 'me e loketse lipeipi tse nang le khatello e phahameng le litlhoko tsa matla.

Mabapi le boemo ba ho pepa,API 5L e tloaelehilenge totobatsa maemo a fapaneng a thomello bakeng sa liphaephe tsa tšepe tse seamless le lipeipi tse cheselitsoeng:

Pipe ea tšepe e se nang seamless (N state): N state e bolela boemo bo tloaelehileng ba kalafo.Liphaephe tsa tšepe tse se nang moeli li tloaelehile pele li beleha ho homogenize microstructure ea phala ea tšepe, ka tsela eo ho ntlafatsa thepa ea eona ea mechine le ho tiea.Ho tloaeleha ho ka felisa khatello ea kelello e setseng le ho ntlafatsa botsitso ba phala ea tšepe.

Welded pipe (M state): M state e bua ka phekolo ea thermomechanical ea phala e cheselitsoeng ka mor'a ho theha le ho cheselletsa.Ka phekolo ea thermomechanical, microstructure ea phala e cheselitsoeng e ntlafatsoa, ​​​​ts'ebetso ea sebaka sa welding e ntlafatsoa, ​​'me matla le botšepehi ba phala e cheselitsoeng nakong ea tšebeliso e tiisitsoe.

API 5L e tloaelehilenge totobatsa ka botlalo sebopeho sa lik'hemik'hale, thepa ea mochini, mekhoa ea tlhahiso, tlhahlobo le litlhoko tsa liteko tsa lipeipi tsa tšepe tsa lipeipi.Ho kengoa ts'ebetsong ha maemo ho netefatsa polokeho le ts'epahalo ea liphaephe tsa tšepe tsa liphaephe ha li tsamaisa oli, khase ea tlhaho le maro a mang.Khetho ea limaraka tse loketseng tsa liphaephe tsa tšepe le boemo ba ho fana ka thepa e ka finyella litlhoko tse khethehileng tsa merero e fapaneng ea boenjiniere le ho netefatsa ts'ebetso e tsitsitseng ea tsamaiso ea liphaephe.