Tšebeliso ea sebali sa pipe bakeng sa lipalo e u lumella ho fumana hore na ke mofuta ofe oa matla a lipalangoang o hlokahalang ho tsamaisa thepa e rekiloeng, hammoho le litšenyehelo tsa tlhahiso. Ho phaella moo, boima ba meter e sebetsang ea phala bo tlameha ho tsejoa ka palo ea mehaho ea tšepe.
Mekhahlelo ea mantlha ea liphaephe tse chitja ke:
- bophara ba ka ntle;
- botenya ba lebota;
- bolelele.
Ho bala boima ba phala, hoa hlokahala ho bonts'a thepa ea tlhahiso le litekanyo tsa eona: bophara, botenya ba lerako le bolelele bohle (L). Haeba u sa fetole boleng ba bolelele ba 1 m esale pele ho calculator, joale re tla fumana boima ba mitha e mathang ea phala e chitja.
Boima ba phala bo baloa ke calculator ho sebelisa foromo:
m = leq×ρ×t×(D-t)×L
Where:
- π - 3,14;
- ρ ke boima ba thepa;
- t ke botenya ba lebota;
- D ke bophara bo ka ntle;
- L ke bolelele ba phala.
Calculator e lekanya boima ba phala ka lebota le bophara, hammoho le thepa ea tlhahiso. Ha u khetha polypropylene lethathamong le theoha, ho sebelisoa tekanyo e itseng ea matla a khoheli ea 950 kg / m.3 bakeng sa mefuta ena ea polasetiki.