Sa350 lf2 flanges feem ntau yog siv los txuas cov kav dej, li qub thiab cov twj. Nws muaj ob peb qib thiab cov chav kawm. Cov no yog corrosion tsis kam thiab siv nyob rau hauv ntau lwm yam kev lag luam. Lawv tau ua rau raws li cov kev ntsuas ntev, lossis mus rau cov qauv nyob sab hauv, xws li ASME thiab API cov lus qhia. Cov khoom muaj pes tsawg leeg suav nrog cov pa roj carbon, pob zeb, mangholorus, sulfur, molybdenum, tooj liab, npib chromium, vanadium thiab niobium.