Paipa maitai porowhitaHe momo paipa rino te mea i hangaia mā te huri i tētahi rīpene rino kia rite ki te āhua o te paipa i tētahi koki porowhita (kia hanga koki) kātahi ka whakarewahia. He mea whakamahi whānuitia i roto i ngā pūnaha paipa mō te tuku hinu, hau māori me te wai.
Diameter Ingoa (DN)
Ko te diameter ingoa e pā ana ki te diameter ingoa o te paipa, arā, te uara ingoa o te rahi o te paipa. Mō ngā paipa maitai porowhita, ko te diameter ingoa he tata tonu ki te diameter roto, ki te diameter waho rānei, engari kāore e rite.
Ko te tikanga ka whakaatuhia mā te DN me tētahi tau, pērā i te DN200, e tohu ana ko te diameter ingoa he paipa maitai 200 mm.
Ngā awhe whānui ingoa (DN) noa:
1. Awhe diameter iti (DN100 - DN300):
DN100 (4 inihi)
DN150 (6 inihi)
DN200 (8 inihi)
DN250 (10 inihi)
DN300 (12 inihi)
2. Awhe whānui waenga (DN350 - DN700):
DN350 (14 inihi)
DN400 (16 inihi)
DN450 (18 inihi)
DN500 (20 inihi)
DN600 (24 inihi)
DN700 (28 inihi)
3. Awhe whānui nui (DN750 - DN1200):
DN750 (30 inihi)
DN800 (32 inihi)
DN900 (36 inihi)
DN1000 (40 inihi)
DN1100 (44 inihi)
DN1200 (48 inihi)
4. Awhe whānui tino nui (DN1300 me runga ake):
DN1300 (52 inihi)
DN1400 (56 inihi)
DN1500 (60 inihi)
DN1600 (64 inihi)
DN1800 (72 inihi)
DN2000 (80 inihi)
DN2200 (88 inihi)
DN2400 (96 inihi)
DN2600 (104 inihi)
DN2800 (112 inihi)
DN3000 (120 inihi)
OD me te ID
Diameter o Waho (OD):
Ko te OD te diameter o te mata o waho o te paipa maitai porowhita. Ko te OD o te paipa maitai porowhita te rahi tuturu o waho o te paipa.
Ka taea te whiwhi i te OD mā te ine tuturu, ā, i te nuinga o te wā ka inehia ki ngā mirimita (mm).
Diameter o roto (ID):
Ko te ID te whānui o te mata o roto o te paipa maitai porowhita. Ko te ID te rahi tuturu o roto o te paipa.
Ko te ID ka tatauhia mai i te OD tangohia te matotoru pakitara e rua i roto i ngā mirimita (mm).
ID=OD-2×te matotoru o te pakitara
Ngā tono noa
He rerekē ngā whakamahinga o ngā paipa maitai porowhita me ngā diameter ingoa rerekē i roto i ngā mara rerekē:
1. Paipa maitai porowhita iti te whānui (DN100 - DN300):
E whakamahia whānuitia ana i roto i ngā mahi hangarau ā-tāone mō ngā paipa wai, ngā paipa rerenga wai, ngā paipa hau, me ētahi atu.
2. paipa maitai porowhita whānui-waenga (DN350-DN700): e whakamahia whānuitia ana i roto i te hinu, te hau māori me te wai ahumahi.
3. paipa maitai porowhita whānui nui(DN750 - DN1200): e whakamahia ana i roto i ngā kaupapa tuku wai tawhiti, ngā paipa hinu, ngā kaupapa ahumahi nui, pērā i te kawe waka waenga.
4. paipa maitai porowhita whānui nui rawa (DN1300 me runga ake): e whakamahia ana mō ngā kaupapa paipa wai tawhiti-rohe, hinu me te hau, ngā paipa ruku wai me ētahi atu kaupapa hanganga nui.
Ngā paerewa me ngā tikanga
Ko te whānui ingoa me ētahi atu whakaritenga o te paipa maitai porowhita ka hangaia i runga anō i ngā paerewa me ngā tikanga e tika ana, pēnei i:
1. Ngā paerewa o te ao:
API 5L: e pā ana ki te paipa maitai kawe paipa, e whakatau ana i te rahi me ngā whakaritenga rauemi o te paipa maitai porowhita.
ASTM A252: e pā ana ki te paipa maitai hanganga, te rahi o te paipa maitai porowhita me ngā whakaritenga hanga.
2. Paerewa ā-Motu:
GB/T 9711: e pā ana ki ngā paipa rino mō te kawe i te umanga hinu me te hau, e tohu ana i ngā whakaritenga hangarau o te paipa rino porowhita.
GB/T 3091: e pā ana ki te kawe wai pēhanga-iti me te paipa maitai whakarewa, e tohu ana i te rahi o te paipa maitai porowhita me ngā whakaritenga hangarau.
Wā tuku: Hurae-15-2025
