Idayamitha ye-Nominal kunye ne-diameter yangaphakathi nangaphandle ye-spiral steel pipe

Umbhobho wentsimbi ye-Spiralluhlobo lombhobho wentsimbi owenziwe ngokuqengqeleka komcu wentsimbi ube yimilo yombhobho kwi-engile ethile ejiyileyo (i-engile yokuyila) kwaye emva koko uyiwelde. Isetyenziswa ngokubanzi kwiinkqubo zemibhobho yeoli, igesi yendalo kunye nokuhanjiswa kwamanzi.

 
Idayamitha yeNominal (DN)
I-diameter ye-Nominal ibhekisela kwi-diameter ye-nominal yombhobho, ixabiso eliqhelekileyo lobungakanani bombhobho. Kumbhobho wensimbi ojikelezayo, i-diameter ye-nominal idla ngokusondela, kodwa ayilingani, eyona-diameter yangaphakathi okanye ngaphandle.
Ngokuqhelekileyo ibonakaliswe yi-DN kunye nenani, njenge-DN200, ebonisa ukuba i-diameter ye-nominal yi-200 mm yensimbi yombhobho.
Uluhlu lwedayamitha eqhelekileyo (DN):
1. Uluhlu lwedamitha encinci (DN100 - DN300):
DN100 (4 intshi)
DN150 (6 intshi)
DN200 (8 intshi)
DN250 (10 intshi)
DN300 (12 intshi)

2. Uluhlu lwedayamitha ephakathi (DN350 - DN700):
DN350 (14 intshi)
DN400 (16 intshi)
DN450 (18 intshi)
DN500 (20 intshi)
DN600 (24 intshi)
DN700 (28 intshi)

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

4. Uluhlu lwedayamitha enkulu eyongezelelweyo (DN1300 nangaphezulu):
DN1300 (52 intshi)
DN1400 (56 intshi)
DN1500 (60 intshi)
DN1600 (64 intshi)
DN1800 (72 intshi)
DN2000 (80 intshi)
DN2200 (88 intshi)
DN2400 (96 intshi)
DN2600 (104 intshi)
DN2800 (112 intshi)
DN3000 (120 intshi)

OD kunye nesazisi
Idayamitha yaNgaphandle (OD):
I-OD yi-diameter yendawo yangaphandle yombhobho wensimbi ojikelezayo. I-OD yombhobho wensimbi ojikelezayo ubukhulu bangempela bomphandle wombhobho.
I-OD inokufunyanwa ngomlinganiselo wangempela kwaye idla ngokulinganiswa ngeemilimitha (mm).
Idayamitha yangaphakathi (ID):
I-ID yi-diameter yangaphakathi yomphezulu we-spiral steel pipe. I-ID yobukhulu bokwenene bengaphakathi lombhobho.
I-ID idla ngokubalwa ukusuka kwi-OD thabatha kabini ubukhulu bodonga ngeemilimitha (mm).
ID=OD-2× ubukhulu bodonga

Usetyenziso oluqhelekileyo
Imibhobho yentsimbi ene-Spiral ene-diameter eyohlukeneyo ineendlela ezahlukeneyo zokusebenzisa kwiindawo ezahlukeneyo:
1. Umbhobho wentsimbi ojikelezayo ophakathi (DN100 - DN300):
Ngokuqhelekileyo isetyenziswe kubunjineli bakamasipala kwimibhobho yokubonelela ngamanzi, imibhobho yokuhambisa amanzi, iipayipi zegesi, njl.

2. umbhobho wensimbi ojikelezayo ophakathi (DN350-DN700): isetyenziswa kakhulu kwi-oyile, kwimibhobho yerhasi yendalo kunye nemibhobho yamanzi kwimizi-mveliso.

3. umbhobho omkhulu wentsimbi ojikelezayo(DN750 - DN1200): isetyenziswe kwiiprojekthi zokuhambisa amanzi kumgama omde, iipayipi zeoli, iiprojekthi ezinkulu zoshishino, ezifana nokuthutha okuphakathi.

4. umbhobho wentsimbi ojikelezayo omkhulu omkhulu (i-DN1300 nangaphezulu): isetyenziswa ikakhulu kumgama omde wengingqi wamanzi, iiprojekthi zemibhobho ye-oyile nerhasi, imibhobho engaphantsi kwamanzi kunye nezinye iiprojekthi ezinkulu zeziseko ezingundoqo.

Imigangatho kunye nemimiselo
Ubukhulu obuqhelekileyo kunye nezinye iinkcukacha zombhobho wensimbi ojikelezayo zihlala ziveliswa ngokuhambelana nemigangatho efanelekileyo kunye nemimiselo, njengale:
1. Imigangatho yamazwe ngamazwe:
API 5L: esebenzayo kumbhobho wentsimbi yokuthutha umbhobho, ichaza ubungakanani kunye neemfuno zezinto eziphathekayo zombhobho wentsimbi ejikelezayo.
I-ASTM A252: esebenzayo kumbhobho wensimbi yesakhiwo, ubungakanani bombhobho wensimbi ojikelezayo kunye neemfuno zokuvelisa.

 

2. UMgangatho weSizwe:
I-GB / T 9711: esebenzayo kwipayipi yensimbi yokuthutha i-oyile kunye negesi yezothutho, ichaza iimfuno zobugcisa zombhobho wensimbi ojikelezayo.
I-GB / T 3091: esebenzayo kwi-low-pressure fluid transport kunye nombhobho wensimbi odibeneyo, ichaza ubungakanani bepayipi yensimbi ye-spiral kunye neemfuno zobugcisa.