API 5L yopanda msoko & welded mzere chitoliro
Kugwiritsa Ntchito Zinthu Chitoliro cha mzere ndi chitoliro chachitsulo chomwe chimagwiritsidwa ntchito ponyamula mafuta, gasi, kapena madzi mtunda wautali. Chimapangidwa ndi chitsulo champhamvu kwambiri chomwe chingathe kupirira kupsinjika kwakukulu ndi kutentha komwe kumachitika poyendetsa. Mapaipi a mzere ayenera kukwaniritsa miyezo yokhwima yomwe imakhazikitsidwa ndi mabungwe monga American Petroleum Institute (API). API 5L ndi muyezo wodziwika bwino pa izi. Amapangidwa m'makulidwe osiyanasiyana, kuyambira mapaipi ang'onoang'ono omwe amagwiritsidwa ntchito popangira mapaipi okhala m'nyumba mpaka mapaipi akuluakulu omwe amagwiritsidwa ntchito ...