Bophara ba lebitso ke bofe?

Ka kakaretso, bophara ba phaephe bo ka aroloa ka bophara ba kantle (De), bophara ba kahare (D), bophara ba lebitso (DN).
Ka tlase ho u fa phapang pakeng tsa phapang ena ea "De, D, DN".

DN ke bophara bo tloaelehileng ba phaephe

Ela Hloko: Hona ha se bophara ba kantle kapa bophara ba kahare; e lokela ho amana le ntshetsopele ya pele ya boenjiniere ba diphaephe le diyuniti tsa borena; hangata e sebediswa ho hlalosa phaephe ya tshepe ya galvanized, e tsamaellanang le diyuniti tsa borena ka tsela e latelang:

Phaephe ea likarolo tse 4: 4/8 inch: DN15;
Phaephe ea metsotso e 6: 6/8 inch: DN20;
Phaephe ea lisenthimithara tse 1: lisenthimithara tse 1: DN25;
Phaephe ea lisenthimithara tse peli: lisenthimithara tse 1 le 1/4: DN32;
Phaephe ea halofo ea lisenthimithara: lisenthimithara tse 1 le 1/2: DN40;
Phaephe ea lisenthimithara tse peli: lisenthimithara tse 2: DN50;
Phaephe ea lisenthimithara tse tharo: lisenthimithara tse 3: DN80 (libaka tse ngata li boetse li bitsoa DN75);
Phaephe ea lisenthimithara tse 'ne: lisenthimithara tse 4: DN100;
Phaephe ea tšepe ea phetisetso ea metsi, khase (phala ea tšepe e entsoeng ka maselakapa phala ea tšepe e sa galvanized), phala ea tšepe e entsoeng ka tšepe, phala ea tšepe-plastiki e kopantsoeng le phala ea polyvinyl chloride (PVC) le lisebelisoa tse ling tsa phala, li lokela ho tšoauoa ka bophara bo tloaelehileng ba "DN" (joalo ka DN15, DN20).

 

De haholo-holo e bolela bophara ba kantle ba phaephe
Tšebeliso e akaretsang ea ho ngola mabitso a De, e hloka ho ngoloa ka mokhoa oa bophara ba kantle ba X botenya ba lebota;

E sebelisoa haholo ho hlalosa:phala ea tšepe e se nang sekoli, PVC le liphaephe tse ling tsa polasetiki, le liphaephe tse ling tse hlokang botenya bo hlakileng ba lebota.
Nka phaephe ea tšepe e qhibilihisitsoeng ka galvanized mohlala, ka DN, De mekhoa e 'meli ea ho ngola mabitso ke e latelang:
DN20 De25×2.5mm
DN25 De32×3mm
DN32 De40×4mm
DN40 De50×4mm

......

 

Ka kakaretso D e bolela bophara ba kahare ba phaephe, d e bontsha bophara ba kahare ba phaephe ya konkreite, mme Φ e bontsha bophara ba sedikadikwe se tlwaelehileng.

Φ e ka boela ea bontša bophara ba ka ntle ba phaephe, empa e lokela ho atisoa ka botenya ba lebota.
Mohlala, Φ25×3 e bolela phaephe e nang le bophara ba kantle ba 25mm le botenya ba lebota ba 3mm.
Phaephe ea tšepe e se nang sekoli kapa phaephe ea tšepe e se nang tšepe, e lokela ho ngoloa "bophara ba kantle × botenya ba lebota".
Mohlala: Φ107×4, moo Φ e ka tlohelwang.
Karolo ea Chaena, ISO le Japane ea ho ngola liphaephe tsa tšepe ka ho sebelisa litekanyo tsa botenya ba lebota ho bontša botenya ba lebota la letoto la liphaephe tsa tšepe. Bakeng sa mofuta ona oa phala ea tšepe, mokhoa oa ho hlahisa bophara ba kantle ba phala × botenya ba lebota. Mohlala: Φ60.5×3.8

De, DN, d, ф ea mofuta o fapaneng oa polelo!
De-- PPR, peipi ea PE, phala ea polypropylene OD
Pipe ea DN -- polyethylene (PVC), phala ea tšepe e lahliloeng, phala ea tšepe e kopantsoeng ea polasetiki le tšepe, phala ea tšepe e galvanized bophara bo tloaelehileng
d -- bophara ba phala ea konkreite bo tloaelehileng
ф -- bophara ba phala ea tšepe e se nang sekoli