ASTM A252 Tau 3ko te rauemi tino noa e whakamahia ana hei paipa puranga porotaka.
Kāore ngā puranga paipa maitai taumata 3 e herea noa ki tētahi tukanga whakaputa motuhake, ā, ka taea te hanga mā te whakamahi i ngā momo tikanga hanga paipa, tae atu kiSMLS(kore hononga),KĪHI(whakapiripiri pewa rukuhia), meEFW(whakapiripiri hiko-whakakotahi). Mā tēnei ngāwari ka taea te whakarerekē ki ngā hiahia hangarau rerekē me ngā horopaki tono.
Hei te taumata teitei rawa atu i roto i te paerewa A52, he tino pai ngā āhuatanga ā-pūkaha me te kaha tuku iti rawa o te 310 MPa me te kaha kume iti rawa o te 455 MPa, ā, ka taea te whakamahi hei wāhanga hanganga pumau e mau ana i te kawenga, hei anga rānei mō ngā pou raima kua maka-ki-te-tūnga.
TeASTM A252E toru ngā taumata o te paerewa mō ngā puranga paipa rino kia rite ki ngā taiao tono me ngā whakaritenga uta. Ko ngā taumata e toru ko:
Tau 1, Tau 2, me Tau 3.
Kua whakaurua mai e te kamupene tētahi huinga katoa o ngā taputapu whakaputa paipa rino JCOE LSAW matatau me ngā taputapu whakamātautau, e tohunga ana ki te whakaputa paipa rino LSAW matotoru-taiepa, whānui-rahi me te DSAW (te whakarewa pewa rua-taha).
Ko ngā whakatakotoranga hua ko:
Diameter o Waho: DN 350 – 1500;
Matotoru o te Pakitara: 8 – 80 mm;
Me papatahi te pito o ngā puranga paipa.
Me tapahi ngā pito ki te mura, ki te mīhini rānei, ā, me tango atu ngā poka.
Mēnā kongā pito piko, me rite te koki o te pito piko30 - 35°.
Botop Steele tuku ana i te whānuitanga o ngā paipa maitai ASTM A52 kounga teitei. Tena koa whakapiri mai ki a mātou mō ō hiahia.
Me hanga te maitai mā tētahi, mā ētahi rānei o ēnei tukanga e whai ake nei: oumu tuwhera, hāora taketake, oumu hiko rānei.
Me hanga te A252 e tekore hononga, ātete hiko i whakarewaina, whakarewa uira, rāneiwhakarewa honohonotukanga.
Me rite ngā hononga o ngā puranga paipa kua whakarewainaroa, papa porowhita, rāneitakai porowhita.
Hei whakarite i te kounga me te mahi a ngā puranga paipa maitai, he mea nui kia whiriwhiria te tukanga whakaputa tika.
He pai rawa te tukanga LSAW (SAWL) mō ngā paipa rino he whānui nui, he pakitara matotoru hoki., inā koa i roto i ngā kaupapa hanga me ngā hanganga e hiahia ana ki te kaha kawe kawenga nui me te hanganga turanga hohonu. Nā tōna kaha nui, tōna kaha kawe kawenga, me tōna ngāwari urutau ki te hohonu, ka taea e ia te urutau ki te whānuitanga o ngā āhuatanga whenua uaua me te whakarato i ngā painga o te tāutanga tere me te roa o te wā.
JCOEHe tukanga hanga noa i roto i te hanga paipa maitai LSAW, he painga o te tino whai hua, te kounga teitei, te kaha whakaputa whānui nui, te tika o ngā āhuatanga, te ngāwari ki te urutau, me te ōhanga, ā, nā ēnei kua waiho hei tukanga hanga paipa pai rawa atu i roto i te maha o ngā kaupapa hangarau nui.
Me whai roto i te maitaikāore e neke atu i te 0.050% te whākawa.
Ko te whakawhāiti i te nui o te whākōkī i roto i te maitai hei whakarite kia pai ngā āhuatanga ā-pūkaha o te maitai, inā koa ka whakamahia mō ngā mahi hanganga pēnei i te whakairi pou whare.
Mā tēnei herenga ka ārai i te pakarukaru rawa o te maitai i ngā pāmahana iti, ā, ka whakarite kia haumaru, kia pono hoki i te whakamahinga.
Kāore he whakaritenga mō ngā ihirangi o ētahi atu huānga.
Nā te mea ko te arotahi matua o ngā ngongo puranga paipa he whakarite kia rawaka te kaha me te pakari o ngā ngongo, he āhuatanga nui ēnei hei whakamahi hei tautoko i ngā hanganga.
Mō ngā ngongo puranga ngongo, ka nui ake te aro ki ngā āhuatanga ā-pūkaha o ngā ngongo, pērā i te kaha tuku, te kaha kume, me te pakari, nā te mea e pā tika ana ēnei āhuatanga ki te kaha kawe kawenga me te pumau hanganga o ngā puranga ngongo i roto i ngā mahi whaihua.
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].
Mā te paerewa ASTM A252 Grade 3 ka whakarite te haumaru me te pono o ngā pou ngongo e whakamahia ana mā te whakatakoto i ngā whakaritenga iti rawa mō ēnei āhuatanga hangarau.
Mō ngā inenga paipa kāore i te rārangihia ki ngā ripanga taumaha paipa, ka taea te tatau i te taumaha mō ia wae roa mā te whakamahi i te tātai.
w = C×(Dt)×t
w: taumaha mō ia wae roa, 1lb/ft [kg/m];
D: te diameter o waho kua tohua, inihi [mm];
t: te matotoru o te pakitara ingoa kua tohua, inihi [mm];
C: 0.0246615 mō ngā tataunga i roto i ngā waeine SI me te 10.69 mō ngā tataunga i roto i ngā waeine USC.
Ko ngā tātaitanga o runga ake nei e ahu mai ana i te whakaaro ko te mātotoru o te paipa maitai he 7.85 kg/dm³.
He kaha, he pakari hoki te ASTM A252 Grade 3 mō ngā momo oneone me ngā whakaritenga kawenga. E whakamahia whānuitia ana tēnei paipa maitai i roto i ngā mahi e whai ake nei:
1. Ngā turanga whareE whakamahia ana te paipa maitai ASTM A252 Tau 3 hei turanga pou mō ngā mahi turanga mō ngā whare teitei, ngā piriti, me ētahi atu hanganga nunui hei whakarato i te tautoko me te pumau e tika ana.
2. Ngā tauranga me ngā whangaKa whakamahia ēnei paipa rino mō te whakatū pou i roto i te hanganga o ngā tauranga me ngā whanga hei whakarite kia kaha te hanganga ki te tu atu i te pānga o ngā kaipuke me te horo o te taiao moana. Hei whakanui ake i te pakari me te ātete ki te waikura o ngā paipa rino, he maha ngā wā ka pania ngā paninga hei whakarato i te tiakitanga tāpiri.
3. Ngā mahi waiE whakamahia ana te paipa maitai ASTM A252 Tau 3 hei whakapakari i ngā pareparenga awa, hei ārai hoki i ngā waipuke i te hanganga o ngā tāhuna, ngā raka, me ētahi atu whakaurunga wai.
4. Ngā kaupapa pūngaoI roto i ngā kaupapa hau, ngā papa hinu, me ētahi atu kaupapa hanganga pūngao, ka whakamahia ēnei paipa rino hei hanganga tautoko hei whakarite i te mahi pumau o ngā taputapu.
5. Ngā whakaurunga kawe wakaE whakamahia ana te paipa maitai ASTM A252 Tau 3 mō te whakairi pou i roto i te hanganga o ngā ara rerewē, ngā huarahi tere, me ngā ara rerewē taunga rererangi kia pai ai te kawe kawenga me te roa.
Mai i tōna whakatūnga i te tau 2014,Botop Steelkua noho hei kaiwhakarato matua o ngā paipa maitai waro i te Tai Tokerau o Haina, e mōhiotia ana mō te ratonga pai rawa atu, ngā hua kounga teitei, me ngā otinga whānui.
Botop SteelHe maha ngā momo paipa rino waro me ngā hua e pā ana, tae atu ki ngā paipa rino tuia, ERW, LSAW, me SSAW, me te whānuitanga katoa o ngā hononga paipa me ngā flanges. Kei roto hoki i ana hua motuhake ngā koranu kounga teitei me ngā maitai kore waikura austenitic, i hangaia kia tutuki ai ngā hiahia o ngā kaupapa paipa rerekē.
Paipa Puranga Rino Tuitui ASTM A252 GR.2 GR.3
Paipa Puranga Rino ASTM A252 GR.3 SSAW
Paipa Wai me te Puranga Rino AS 1579 SSAW
Puranga Paipa Rino EN10219 S355J0H LSAW(JCOE)
Paipa Rino ERW EN 10219 S275J0H/S275J2H mō ngā Hanganga
Paipa Rino Kore-Tuitui Waro BS EN10210 S355J0H
Paipa maitai ERW hanganga EN10210 S355J2H
Paipa Whakarewa-Āwhata API 5L PSL1&PSL2 GR.B
Ngongo Hanganga Rino Waro ASTM A501 Tau B LSAW
Paipa maitai waro ASTM A672 B60/B70/C60/C65/C70 LSAW
Paipa Rino ASTM A671/A671M LSAW
Ngongo Hanganga Rino Kore-Tuitui ASTM A500 Tau C
