Ububanzi obuqhelekileyo kunye nobubanzi bangaphakathi nangaphandle bombhobho wentsimbi ejikelezayo

Umbhobho wentsimbi ejikelezayoluhlobo lombhobho wentsimbi owenziwe ngokuqengqa umcu wentsimbi ube yimilo yombhobho kwi-engile ethile ejikelezayo (i-engile yokwenza) uze uwudibanise. Usetyenziswa kakhulu kwiinkqubo zemibhobho yokuhambisa ioyile, igesi yendalo kunye namanzi.

 
Ububanzi obuqhelekileyo (DN)
Ububanzi obuqhelekileyo bubhekisa kububanzi obuqhelekileyo bombhobho, obuxabiso eliqhelekileyo lobukhulu bombhobho. Kwimbhobho yentsimbi ejikelezayo, ububanzi obuqhelekileyo buhlala busondele, kodwa bungalingani, nobubanzi bangaphakathi okanye bangaphandle bokwenyani.
Idla ngokubonakaliswa yi-DN kunye nenani, elifana ne-DN200, elibonisa ukuba ububanzi obuqhelekileyo yipayipi yentsimbi eyi-200 mm.
Uluhlu oluqhelekileyo lwe-nominal diameter (DN):
1. Uluhlu oluncinci lobubanzi (DN100 - DN300):
DN100 (4 intshi)
DN150 (ii-intshi ezi-6)
I-DN200 (ii-intshi ezi-8)
DN250 (10 intshi)
I-DN300 (ii-intshi ezili-12)

2. Uluhlu oluphakathi lobubanzi (DN350 - DN700):
I-DN350 (ii-intshi ezili-14)
I-DN400 (ii-intshi ezili-16)
I-DN450 (ii-intshi ezili-18)
DN500 (20 intshi)
I-DN600 (ii-intshi ezingama-24)
DN700 (28 intshi)

3. Uluhlu olukhulu lobubanzi (DN750 - DN1200):
DN750 (30 intshi)
DN800 (32 intshi)
DN900 (36 intshi)
DN1000 (40 intshi)
DN1100 (44 intshi)
DN1200 (48 intshi)

4. Uluhlu olukhulu kakhulu lobubanzi (DN1300 nangaphezulu):
DN1300 (52 intshi)
I-DN1400 (ii-intshi ezingama-56)
DN1500 (ii-intshi ezingama-60)
I-DN1600 (ii-intshi ezingama-64)
DN1800 (72 intshi)
I-DN2000 (ii-intshi ezingama-80)
I-DN2200 (ii-intshi ezingama-88)
I-DN2400 (ii-intshi ezingama-96)
I-DN2600 (104 intshi)
I-DN2800 (112 intshi)
I-DN3000 (ii-intshi ezili-120)

I-OD kunye ne-ID
Ububanzi obungaphandle (OD):
I-OD bububanzi bomphezulu wangaphandle wombhobho wentsimbi ejikelezayo. I-OD yombhobho wentsimbi ejikelezayo bubungakanani bokwenyani bomphandle wombhobho.
I-OD ingafunyanwa ngokulinganisa kwangempela kwaye idla ngokulinganiswa ngeemilimitha (mm).
Ububanzi bangaphakathi (ID):
I-ID bububanzi bomphezulu wangaphakathi wombhobho wentsimbi ojikelezayo. I-ID bubungakanani bokwenyani bombhobho wangaphakathi.
I-ID idla ngokubalwa ukusuka kwi-OD minus kabini ubukhulu bodonga ngeemilimitha (mm).
ID=OD-2×ubukhulu bodonga

Izicelo eziqhelekileyo
Imibhobho yentsimbi ejikelezayo eneedayamitha ezahlukeneyo inezicelo ezahlukeneyo kwiindawo ezahlukeneyo:
1. Umbhobho wentsimbi ejikelezayo enobubanzi obuncinci (DN100 - DN300):
Isetyenziswa kakhulu kubunjineli bukamasipala kwimibhobho yokuhambisa amanzi, imibhobho yokukhupha amanzi, imibhobho yegesi, njl.

2. Umbhobho wentsimbi ojikelezayo ophakathi nobubanzi (DN350-DN700): usetyenziswa kakhulu kwimibhobho yeoyile, igesi yendalo kunye nemibhobho yamanzi yemizi-mveliso.

3. umbhobho wentsimbi ejikelezayo enobubanzi obukhulu(DN750 - DN1200): isetyenziswa kwiiprojekthi zokuhambisa amanzi ezikude, imibhobho yeoyile, iiprojekthi zoshishino ezinkulu, ezifana nothutho oluphakathi.

4. Umbhobho wentsimbi ejikelezayo enobubanzi obukhulu kakhulu (DN1300 nangaphezulu): isetyenziselwa ikakhulu iiprojekthi zamanzi, ioyile kunye negesi ezinqumla umgama omde, imibhobho yamanzi angaphantsi komhlaba kunye nezinye iiprojekthi zeziseko zophuhliso ezinkulu.

Imigangatho kunye nemigaqo
Ububanzi obuqhelekileyo kunye nezinye iinkcukacha zombhobho wentsimbi ejikelezayo zihlala ziveliswa ngokuhambelana nemigangatho kunye nemigangatho efanelekileyo, efana nale:
1. Imigangatho yamazwe ngamazwe:
I-API 5L: iyasebenza kumbhobho wentsimbi wokuthutha imibhobho, ichaza ubungakanani kunye neemfuno zezinto ezifunekayo kumbhobho wentsimbi ojikelezayo.
I-ASTM A252: iyasebenza kumbhobho wesinyithi olwakhiwo, ubungakanani bombhobho wesinyithi ojikelezayo kunye neemfuno zokuvelisa.

 

2. Umgangatho weSizwe:
I-GB/T 9711: iyasebenza kumbhobho wentsimbi ekuthuthweni kweshishini leoyile negesi, ichaza iimfuno zobugcisa zombhobho wentsimbi ojikelezayo.
I-GB/T 3091: isebenza ekuthuthweni kolwelo oluphantsi koxinzelelo oluphantsi ngombhobho wentsimbi odibeneyo, ichaza ubungakanani bombhobho wentsimbi ejikelezayo kunye neemfuno zobugcisa.