ASTM A252Ko te paipa rino he rauemi puranga paipa porotaka noa e kapi ana i ngā momo puranga paipa rino kua whakapirihia me ngā momo hononga kore mo ngā puranga paipa rino e whakamahia ai te rango rino hei mema pikau kawenga tuturu, hei anga rānei hei hanga puranga raima kua maka-ki-te-tūnga.
Tau 3koia te taumata mahi teitei rawa atu i roto i ngā taumata e toru o A252, me te iti rawakaha whakaputa o te 310MPa [45,000 psi]me te iti rawakaha kume o te 455MPa [66,000 psi]Ki te whakaritea ki ētahi atu taumata, he pai ake te Taumata 3 mō ngā hanganga e pāngia ana e ngā kawenga taumaha, e ngā taiao uaua ake rānei, ā, he maha ngā wā ka whakamahia hei hanga turanga mō ngā piriti nui, ngā whare teitei, ngā papaaho tai moana rānei.
Kua wehea te A252 kia toru ngā taumata hei whakatutuki i ngā taiao whakamahinga rerekē.
Tau 1,Tau 2, meTau 3.
Te piki haere mārire o ngā āhuatanga ā-pūkaha.
Tau 1e whakamahia ana i ngā tono e pai ana te kounga o te oneone, ā, kāore i te tino teitei ngā whakaritenga mō te pikaunga. Ko ētahi tauira ko ngā turanga hanganga māmā mō ngā whare noho, ngā whare arumoni rānei, ngā piriti iti rānei kāore e hiahiatia he kawenga nui.
Tau 2he pai mō ngā tono me ngā āhuatanga oneone ngoikore, ngā whakaritenga kawenga nui rānei. Hei tauira, ngā piriti taumaha-taurite, ngā whare arumoni nui, ngā hanganga rānei o ngā whare tūmatanui. Ka taea hoki te whakamahi i ngā wāhi he teitei te taumata wai, pērā i ngā awa me ngā roto, e hiahiatia ana te ātete kaha ki te hurihanga.
Tau 3e whakamahia ana mō ngā mahi taumaha i roto i ngā āhuatanga tino kino, pērā i ngā piriti nui, ngā turanga taputapu taumaha, ngā mahi turanga hohonu rānei mō ngā whare teitei. Hei tāpiri, mō ngā āhuatanga whenua motuhake, pērā i ngā oneone tino ngohengohe, kāore rānei i te pumau, ka tukuna e te Wāhanga 3 te kaha kawe kawenga me te pumau teitei rawa atu.
I whakatūria i te tau 2014,Botop Steelhe kaiwhakarato paipa maitai waro matua i te Tai Tokerau o Haina, e mōhiotia ana mō te hanga paipa maitai kounga teitei, he mea whakarewa, he mea hono kore hononga.
Ka tutuki i ā mātou hua katoa ngā paerewa tino pakari o te ASTM A252, kia pai ai te mahi i raro i ngā āhuatanga tino kino.
Kei a mātou anō hoki te whānuitanga o ngā taputapu me ngā flange hei whakatutuki i ngā hiahia o ngā kaupapa paipa maha.
Ina whiriwhiria e koe te Botop Steel, ka whiriwhiria e koe te hiranga me te pono.
Ka taea te whakarōpū i ngā paipa puranga ASTM A252 ki ngā tukanga hanga matua e rua:he kore hononga, he mea whakarewa.
I roto i te tukanga whakarewa, ka taea te wehewehe anō kiERW, EFW, meKĪHI.
Ka taea te whakarōpū i te SAW ki ngāLSAW(SAWL) meSSAW(HSAW) i runga anō i te ahunga o te whakarewanga.
Nā te mea he tikanga whakarewa pewa rua-taha te whakamahi i te SAW, ka kiia hoki koDSAW.
Mā ēnei momo tikanga hanga ka taea e te paipa puranga ngongo ASTM A252 te whakatutuki i te whānuitanga o ngā hiahia hangarau.
Koinei te tūtohi rere whakaputa o te paipa maitai porowhita (SSAW):
Paipa maitai SSAWHe mea tino pai mō te hanga paipa rino whānui, ā, ka taea te hanga i ngā whānui tae atu ki te 3,500mm. Ehara i te mea ka taea anake te hanga i ngā roa tino roa, he mea tino pai mō ngā hanganga nunui, engari he iti ake te utu mō ngā paipa rino SSAW i ngā paipa rino LSAW me SMLS.
Ka taea e Botop Steel te tuku i ngā rahi e whai ake nei o ngā ngongo maitai:
Kaua te nui o te whākawakawa e neke ake i te 0.050%.
He tino māmā ngā whakaritenga hanganga matū mō te ASTM A252 ki te whakatauritea ki ētahi atu paerewa paipa mō ētahi atu tono nā te mea ina whakamahia te paipa hei puranga paipa, he hanganga te nuinga. He rawaka kia taea e te paipa maitai te tu atu ki ngā kawenga me ngā āhuatanga taiao e hiahiatia ana. Mā tēnei matū kua whakangawaritia ka āwhina ki te whakapai ake i te utu me te hua me te whakatutuki i ngā hiahia taketake o te haumaru hanganga me te pakari.
AKei te Ripanga 2 ngā uara iti rawa i tatauhia:
Mena he waenga te matotoru o te pakitara kua tohua ki ērā e whakaaturia ana i runga ake nei, me whakatau te uara whakaroa iti rawa penei:
Kōeke 3: E = 32t + 10.00 [E = 1.25t + 10.00]
E: te roa i roto i te 2 inihi [50.8 mm], %;
t: te matotoru o te pakitara ingoa kua tohua, inihi [mm].
Mō ngā rahi o ngā puranga paipa kāore i te rārangihia i te tūtohi taumaha paipa, me tatau te taumaha mō ia wae roa penei:
W = 10.69(D - t)t [ W = 0.0246615(D - t)t ]
W = taumaha mō ia wae roa, lb/ft [kg/m].
D = te diameter o waho kua tohua, inihi [mm],
t = te matotoru o te pakitara ingoa kua tohua, inihi [mm].
He whānuitanga o ngā paninga e tukuna ana e tā mātou kamupene, tae atu ki te peita, te wanihi, te piauau, te epoxy whai-konutea, te 3LPE, te epoxy tāra waro, me ētahi atu, hei whakatutuki i ngā hiahia o ngā kaupapa maha, hei whakarite hoki i te roa o te wā.
I te wā e hoko ana i te Ngongo Pire A252, me whakarato ēnei mōhiohio hei āwhina i te kaiwhakarato ki te whakatutuki tika i ō hiahia me te whakaiti i ngā whakarerekētanga me ngā whakaroa pea.
1 Te rahinga (waewae, te maha rānei o ngā roa),
2 Ingoa o te rauemi (ngā puranga paipa maitai),
3 Ngā tikanga hanga (kore hononga, he mea whakarewa rānei),
Tau 4 (1, 2, 3 rānei),
5 Rahi (te whānui o waho me te matotoru o te pakitara ingoa),
6 Ngā Roa (takitahi matapōkere, takirua matapōkere, ōrite rānei),
7 Whakamutunga mutunga,
8 Te tohu whakatakotoranga ASTM me te tau i tukuna ai.
