API 5CT ke tekanyetso ea khase ea oli ke American Petroleum Institute, haholo-holo bakeng sa phala ea oli, li-tubing le casing.

Khase ea oli ea API 5CT e sebelisetsoang ho cheka seliba sa oli, e sebelisoang haholo-holo bakeng sa ho cheka le ho phethoa ha lebota le nepahetseng la tšehetso, ho netefatsa hore boitšoaro le ho phethoa ha mokhoa oa ho cheka ka mor'a ts'ebetso e tloaelehileng ea liliba.Casing ke ho boloka liliba li tsamaisa bophelo.E le maemo a fapaneng a thutafate, tlas'a lefatše rarahaneng khatello ea kelello boemo, ho hula, tobetsa, kobehang, khatello ea kelello torsional sebetsa ka phello e kopantseng ea tube, e leng casing ka boeona, boleng ba ditlhoko tse phahameng.Hang ha khese ka boeona e senyehile ka lebaka le itseng, e ka lebisa lilibeng tsohle tsa tlhahiso, kapa esita le ho hlakoloa.

Mechanical properties ea API 5CT API 5CTSeamless steel tubing: