Me whakauru ētahi tawhā matua hei whakaahua tika i te rahi o te ngongo maitai:
Diameter o Waho (OD)
Ko te diameter o waho o te paipa maitai, e whakaatuhia ana ko te diameter ingoa (DN) ko te rahi paipa ingoa rānei (NPS).
Rahi Paipa Ingoa (NPS) vs. Diameter Ingoa (DN)
Ko te NPS te rahi ingoa i runga i te inihi, ko te DN ia te diameter ingoa i roto i ngā mirimita. He tino māmā te whanaungatanga tahuritanga: ko te uara o te DN he ōrite ki te uara NPS kua whakareatia ki te 25.4 (mm/inihi) hei whakaawhiwhi i te hua.
I roto i te mahi, ko te ōritenga i waenga i ngā paerewa NPS me DN e ahu mai ana i ngā ripanga ine paerewa kua whakatūria.
Matotoru o te Pakitara (WT)
Te matotoru o te pakitara paipa. Mō ngā paipa rahi paerewa, he maha ngā wā ka honoa te matotoru o te pakitara ki te Rārangi o te paipa, hei tauira, Rārangi 40, Rārangi 80 rānei, ina tohu ngā uara nui ake i ngā pakitara matotoru.
Roa
Ko te roa o te paipa rino, ka taea te whakapūmau, te whakarite rānei, i runga i ngā whakaritenga hanga me te tono. Ko ngā roa noa he 6 mita me te 12 mita.
Rauemi
Ngā paerewa rauemi me ngā tohu mō ngā paipa maitai, pērā i te ASTM A106 Tohu B, API 5L Tohu B, me ētahi atu. E whakamārama ana ēnei paerewa i te hanganga matū me ngā āhuatanga ā-tinana o te paipa.
Ngā Paerewa
Ko ngā paerewa ā-ahu mō ngā paipa waro me te maitai kore waikura e whai ana i te ASME B36.10M (maitai waro me te koranu) me te B36.19M (paipa maitai kore waikura).
Ngā Ripanga Rahi Paipa me ngā Ripanga Taumaha (WGT)
whakarato i tētahi huarahi paerewa hei whakaahua i ngā matotoru o te pakitara paipa i raro i ngā Rārangi Kupu rerekē, tae atu ki te whakarōpūtanga o ngā taumata taumaha pēnei i te STD, XS, XXS, me ētahi atu.
Ka pā tika te matotoru o te pakitara o te paipa ki ngā rahi me te taumaha o roto. He mea nui te matotoru o te pakitara nā te mea ka whakatau i te nui o te pēhanga o roto ka taea e te paipa te tu atu.
Tau o te hōtaka
Ko tētahi huarahi hei whakaatu i te matotoru o te pakitara o tētahi paipa, pērā i te Āpitihanga 40 me te 80, e pā ana ki te matotoru paerewa me te matotoru whakakaha o te pakitara o te paipa mō tētahi diameter o waho kua hoatu.
Ko te tatau tata mō te tau o te hōtaka e whai ake nei:
Nā te kaha ki te tu atu i ngā pēhanga noa, e hiahiatia ana ngā paipa rino o te Wāhanga 40 me te Wāhanga 80 i roto i ngā momo ahumahi. Nā te mea kua hangaia ēnei paipa kia tu atu i ngā pēhanga teitei ake, e hiahiatia ana i roto i te nui hei whakatutuki i ngā hiahia o ngā momo ahumahi.
| NPS | DIAMETĀ O WAHO (IN) | DIAMETĀ O ROTO (IN) | MATORU O TE PAKITARA (IN) | TAUMAHA (LB/FT) |
| 1/8 | 0.405" | 0.269" | 0.068" | 0.24 pauna/putu |
| 1/4 | 0.540" | 0.364" | 0.088" | 0.42 pauna/putu |
| 3/8 | 0.675" | 0.493" | 0.091" | 0.57 pauna/putu |
| 1/2 | 0.840" | 0.622" | 0.109" | 0.85 pauna/putu |
| 3/4 | 1.050" | 0.824" | 0.113" | 1.13 pauna/putu |
| 1 | 1.315" | 1.049" | 0.133" | 1.68 pauna/putu |
| 1 1/4 | 1.660" | 1.380" | 0.140" | 2.27 pauna/putu |
| 1 1/2 | 1.900" | 1.610" | 0.145" | 2.72 pauna/putu |
| 2 | 2.375" | 2.067" | 0.154" | 3.65 pauna/putu |
| 2 1/2 | 2.875" | 2.469" | 0.203" | 5.79 pauna/putu |
| 3 | 3.500" | 3.068" | 0.216" | 7.58 pauna/putu |
| 3 1/2 | 4.000" | 3.548" | 0.226" | 9.11 pauna/putu |
| 4 | 4.500" | 4.026" | 0.237" | 10.79 pauna/putu |
| 5 | 5.563" | 5.047" | 0.258" | 14.62 pauna/putu |
| 6 | 6.625" | 6.065" | 0.280" | 18.97 pauna/putu |
| 8 | 8.625" | 7.981" | 0.322" | 28.55 pauna/putu |
| 10 | 10.750" | 10.020" | 0.365" | 40.48 pauna/putu |
| 12 | 12.75" | 11.938" | 0.406" | 53.52 pauna/putu |
| 14 | 14.000" | 13.124" | 0.438" | 63.50 pauna/putu |
| 16 | 16.000" | 15.000" | 0.500" | 82.77 pauna/putu |
| 18 | 18.000" | 16.876" | 0.562" | 104.70 pauna/putu |
| 20 | 20.000" | 18.812" | 0.594" | 123.10 pauna/putu |
| 24 | 24.000" | 22.624" | 0.688" | 171.30 pauna/putu |
| NPS | DIAMETĀ O WAHO (IN) | DIAMETĀ O ROTO (IN) | MATORU O TE PAKITARA (IN) | TAUMAHA (LB/FT) |
| 1/8 | 0.405" | 0.215" | 0.095" | 0.32 pauna/putu |
| 1/4 | 0.540" | 0.302" | 0.119" | 0.54 pauna/putu |
| 3/8 | 0.675" | 0.423" | 0.126" | 0.74 pauna/putu |
| 1/2 | 0.840" | 0.546" | 0.147" | 1.09 pauna/putu |
| 3/4 | 1.050" | 0.742" | 0.154" | 1.47 pauna/putu |
| 1 | 1.315" | 0.957" | 0.179" | 2.17 pauna/putu |
| 1 1/4 | 1.660" | 1.278" | 0.191" | 3.00 pauna/putu |
| 1 1/2 | 1.900" | 1.500" | 0.200" | 3.63 pauna/putu |
| 2 | 2.375" | 1.939" | 0.218" | 5.02 pauna/putu |
| 2 1/2 | 2.875" | 2.323" | 0.276" | 7.66 pauna/putu |
| 3 | 3.500" | 2.900" | 0.300" | 10.25 pauna/putu |
| 3 1/2 | 4.000" | 3.364" | 0.318" | 12.50 pauna/putu |
| 4 | 4.500" | 3.826" | 0.337" | 14.98 pauna/putu |
| 5 | 5.563" | 4.813" | 0.375" | 20.78 pauna/putu |
| 6 | 6.625" | 5.761" | 0.432" | 28.57 pauna/putu |
| 8 | 8.625" | 7.625" | 0.500" | 43.39 pauna/putu |
| 10 | 10.750" | 9.562" | 0.594" | 64.42 pauna/putu |
| 12 | 12.75" | 11.374" | 0.688" | 88.63 pauna/putu |
| 14 | 14.000" | 12.500" | 0.750" | 106.10 pauna/putu |
| 16 | 16.000" | 14.312" | 0.844" | 136.58 pauna/putu |
| 18 | 18.000" | 16.124" | 0.938" | 170.87 pauna/putu |
| 20 | 20.000" | 17.938" | 1.031" | 208.92 pauna/putu |
| 24 | 24.000" | 21.562" | 1.219" | 296.58 pauna/putu |
Nō reira, ko tētahi tauira katoa o te whakaahuatanga rahi o tētahi paipa maitai ko "NPS 6 inihi, Āpitihanga 40, ASTM A106 Tau B, Roa 6 mita". E tohu ana tēnei i tētahi paipa maitai me te diameter ingoa o te 6 inihi, Āpitihanga 40, i hangaia kia rite ki ngā paerewa ASTM A106 Grade B, ā, e 6 mita te roa.
Te wā tuku: 28-Pepuere-2024