Paipa maitai JIS G 3461he paipa maitai waro tui-kore (SMLS) he paipa rino ātete-hiko (ERW) rānei, e whakamahia ana i roto i ngā kohua me ngā whakawhiti wera mō ngā mahi pēnei i te whakatutuki i te whakawhiti wera i waenga i roto me waho o te ngongo.
STB340he paipa maitai waro i roto i te paerewa JIS G 3461. Ko te kaha kume iti rawa o te 340 MPa, ā, ko te kaha tuku iti rawa o te 175 MPa.
Koinei te rauemi whiriwhiri mō ngā mahi ahumahi maha nā te mea he kaha teitei, he pumau pai ki te wera, he ngāwari ki te urutau, he ātete ki te waikura, he whai hua te utu, ā, he pai hoki te tukatuka.
JIS G 3461e toru ngā taumata.STB340, STB410, STB510.
STB340Kaha kume iti rawa: 340 MPa; Kaha tuku iti rawa: 175 MPa.
STB410Kaha Kume Iti Rawa: 410 MPa; Kaha Tuku Iti Rawa: 255 MPa.
STB510:Kaha Kume Iti rawa: 510 MPa; Kaha Tuku Iti rawa: 295 MPa.
Ina hoki, ehara i te mea uaua ki te kimi ko te momo JIS G 3461 kua whakarōpūtia kia rite ki te kaha kume iti rawa o te paipa maitai.
I te pikinga ake o te kōeke o te rauemi, ka piki ake anō hoki tōna kaha kume me te kaha tukua, kia taea ai e te rauemi te tu atu i ngā kawenga me ngā pēhanga teitei ake mō ngā taiao mahi uaua ake.
Te whānui o waho o te 15.9-139.8mm.
Ko ngā whakamahinga i roto i ngā poiha me ngā whakawhiti wera, kāore e hiahiatia he whānui rawa o ngā ngongo. Ka whakanui ake te pai o te wera o ngā ngongo iti ake nā te mea he teitei ake te ōwehenga o te horahanga mata ki te rōrahi mō te whakawhiti wera. Mā tēnei ka tere ake, ka whai hua ake hoki te whakawhiti i te pūngao wera.
Me hanga ngā paipa mai i tete maitai kua mate.
He huinga o ngā tikanga hanga paipa me ngā tikanga whakaoti.
I roto i ngā taipitopito, ka taea te whakarōpū i ēnei penei:
Ngongo maitai tuitui kua oti te wera: SH
Ngongo maitai kore-whakaoti-matao: SC
Hei ngongo maitai whakarewa ātete hiko: EG
Ngongo maitai hiko ātete-whakarewa wera-oti: EH
Ngongo maitai whakarewa ātete hiko kua oti te whakamatao: EC
Anei te rere o te whakaputanga o te hononga wera-oti.
Mō te tukanga hanga hononga-kore, ka taea te wehewehe whānui ki ngā paipa rino hononga-kore me te diameter o waho neke atu i te 30mm mā te whakamahi i te whakaputanga wera, me te 30mm mā te whakamahi i te whakaputanga matao.
Me rite ngā tikanga tātari wera ki ngā paerewa o te JIS G 0320.
Ka taea te tāpiri i ngā huānga whakarewa i tua atu i ērā hei whiwhi i ngā āhuatanga motuhake.
Ina tātarihia te hua, me tutuki i ngā uara rerekētanga o te hanganga matū o te paipa ngā whakaritenga o te Ripanga 3 o JIS G 0321 mō ngā paipa maitai kore hononga me te Ripanga 2 o JIS G 0321 mō ngā paipa maitai ātete-whakarewa.
| Tohu o te māka | C (Waro) | Si (Hikona) | Mn (Mangane) | P (Pūhāota) | S (Whānariki) |
| mōrahi | mōrahi | mōrahi | mōrahi | ||
| STB340 | 0.18 | 0.35 | 0.30-0.60 | 0.35 | 0.35 |
| Ka āhei te kaihoko te tohu i te nui o te Si kei roto i te awhe o te 0.10% ki te 0.35%. | |||||
Kua hangaia te hanganga matū o STB340 hei whakarite i ngā āhuatanga miihini me te ngāwari o te miihini, ā, e tika ana hoki mō te whakarewa me ngā whakamahinga i roto i ngā taiao pāmahana teitei.
| Tohu o te māka | Te kaha kume a | Te pūwāhi hua, te ahotea whakamātautau rānei | Te roanga iti rawa, % | ||
| Diameter o waho | |||||
| <10mm | ≥10mm <20mm | ≥20mm | |||
| N/mm² (MPA) | N/mm² (MPA) | Wāhanga whakamātautau | |||
| Nama 11 | Nama 11 | Nama 11/Nama 12 | |||
| meneti | meneti | Te ahunga whakamātautau kume | |||
| Whakarara ki te tuaka ngongo | Whakarara ki te tuaka ngongo | Whakarara ki te tuaka ngongo | |||
| STB340 | 340 | 175 | 27 | 30 | 35 |
Kia mōhio: mō ngā ngongo whakawhiti wera anake, ka taea e te kaihoko te tohu i te uara mōrahi o te kaha kume, ki te tika. I tēnei wā, ko te uara kaha kume mōrahi ko te uara i whiwhi mā te tāpiri i te 120 N/mm² ki te uara o tēnei ripanga.
Ina whakahaerehia te whakamātautau kume ki te wahi whakamātautau Nama 12 mō te ngongo kei raro iho i te 8 mm te matotoru o te pakitara.
| Tohu o te māka | Te taputapu whakamātautau i whakamahia | Te whakaroa iti rawa, % | ||||||
| Te matotoru o te pakitara | ||||||||
| ＞1 ≤2 mm | ＞2 ≤3 mm | ＞3 ≤4 mm | ＞4 ≤5 mm | ＞5 ≤6 mm | ＞6 ≤7 mm | ＞7 ＜8 mm | ||
| STB340 | Nama 12 | 26 | 28 | 29 | 30 | 32 | 34 | 35 |
Ka tatauhia ngā uara whakaroa o tēnei ripanga mā te tango i te 1.5% mai i te uara whakaroa i homai i te Ripanga 4 mō ia whakahekenga 1 mm o te matotoru o te pakitara ngongo mai i te 8 mm, ā, mā te whakaawhiwhi i te hua ki te tauoti e ai ki te Ture A o JIS Z 8401.
Me rite te tikanga whakamātautau ki te JIS Z 2245. Me ine te pakeke o te wahi whakamātautau i runga i tōna wāhanga whakawhiti, i tōna mata o roto rānei i ngā tūranga e toru mō ia wahi whakamātautau.
| Tohu o te māka | Te pakeke o Rockwell (te uara toharite o ngā tūranga e toru) HRBW |
| STB340 | 77 te mōrahi |
| STB410 | 79 te mōrahi |
| STB510 | 92 mōrahi |
Kaua tēnei whakamātautau e mahia ki ngā ngongo he 2 mm te matotoru o te pakitara, iti iho rānei. Mō ngā ngongo maitai whakarewa ātete hiko, me mahi te whakamātautau ki te wāhanga ehara i te whakarewa, i ngā rohe rānei e pāngia ana e te wera.
Kāore e pā ki ngā ngongo maitai tuitui.
Tikanga Whakamātautau Whakanohoia te tauira ki roto i te mīhini ka whakahāngai kia tae rā anō te tawhiti i waenga i ngā papa e rua ki te uara kua tohua ko H. Kātahi ka tirohia te tauira mō ngā pakaru.
I te whakamātautau i te paipa whakarewa ātete nui, ko te rārangi i waenga i te whakarewa me te pokapū o te paipa he poutū ki te ahunga pēhanga.
H=(1+e)t/(e+t/D)
H: te tawhiti i waenga i ngā pereti (mm)
t: te matotoru o te pakitara o te ngongo (mm)
D: te diameter o waho o te ngongo (mm)
e:te pūmau kua tautuhia mō ia taumata o te ngongo. STB340: 0.09; STB410: 0.08; STB510: 0.07.
Kāore e pā ki ngā ngongo maitai tuitui.
Ka whakawerahia tetahi pito o te tauira i te pāmahana rūma (5°C ki te 35°C) me te taputapu kōniko i te koki o te 60° tae noa ki te whakanuia o te diameter o waho mā te tauwehenga o te 1.2, ā, ka tirotirohia mēnā he pakaru.
Ka pā anō hoki tēnei whakaritenga ki ngā ngongo he nui ake te whānui o waho i te 101.6 mm.
Kāore pea e taea te tango i te whakamātautau whakapata whakamuri i te wā e whakahaerehia ana te whakamātautau mura.
Tapahia he wahi whakamātautau, 100 mm te roa, mai i tetahi pito o te paipa, ka tapahia te wahi whakamātautau kia rua, 90° mai i te rārangi whakarewa i ngā taha e rua o te porowhita, me tango te haurua kei roto te whakarewa hei wahi whakamātautau.
I te pāmahana rūma (5 °C ki te 35 °C) whakapapatahia te tauira kia rite ki tētahi pereti me te hononga whakarewa ki runga, ka tirotirohia te tauira mō ngā kapiti i te hononga whakarewa.
Me whakamātautau ia paipa rino mā te whakamahi i te wai, mā te kore rānei e whakangaro.hei whakarite i te kounga me te haumaru o te paipa, kia tutuki ai hoki ngā paerewa whakamahinga.
Whakamātautau Waipēhi
Puritia te roto o te paipa ki te pēhanga iti rawa, teitei ake rānei P (P mōrahi 10 MPa) mō te iti rawa 5 hēkona, kātahi ka tirohia mēnā ka taea e te paipa te tu atu i te pēhanga me te kore e turuturu.
P=2st/D
P: pēhanga whakamātautau (MPa)
t: te matotoru o te pakitara o te ngongo (mm)
D: te whānui o waho o te ngongo (mm)
s: 60 % o te uara iti rawa kua tohua o te pūwāhi tuku, te ahotea whakamātautau rānei.
Whakamātautau Kore-Whakangaro
Me whakahaere te whakamātautau kore-whakangaro o ngā ngongo maitai ewhakamātautau iahiko ultrasonic, iahiko eddy rānei.
Mōultrasonicngā āhuatanga tirotiro, te tohu mai i tētahi tauira tohutoro kei roto he paerewa tohutoro o te akomanga UD e ai ki te tohu i roto iJIS G 0582me kiia he taumata whakaoho, ā, me rite, me nui ake rānei te tohu taketake i te taumata whakaoho.
Ko te arotautanga paerewa mō te kitengaiahiko hurihurime whai i te kāwai EU, EV, EW, EX rānei te whakamātautau kua tohua i roto iJIS G 0583, ā, kaua he tohu e rite ana, e nui ake rānei i ngā tohu mai i te tauira tohutoro kei roto te paerewa tohutoro o te kāwai kua whakahuatia.
Mō ētahi atuNgā Tūtohi Taumaha Paipa me ngā Rārangi Paipai roto i te paerewa, ka taea e koe te pāwhiri.
Whakamahia te huarahi tika mō te tapanga i ngā mōhiohio e whai ake nei.
a) Tohu o te tohu;
b) Tohu mō te tikanga hanga;
c) Ngā Ahu: te whānui o waho me te matotoru o te pakitara;
d) Ingoa o te kaihanga, te waitohu rānei e tohu ana i te ingoa.
Mēnā he uaua te tohu i ia ngongo nā te iti o te diameter o waho, nā te kaihoko rānei i tono mai, ka taea te hoatu te tohu ki ia paihere ngongo mā te huarahi e tika ana.
E whakamahia whānuitia ana te STB340 i roto i te hanga paipa wai me ngā paipa hau mō ngā momo kohua ahumahi, inā koa i ngā taiao e hiahiatia ana te ātete ki ngā pāmahana me ngā pēhanga teitei.
Nā te mea he pai ōna āhuatanga kawe wera, he pai hoki mō te hanga paipa mō ngā whakawhiti wera, hei āwhina i te whakawhiti wera i waenga i ngā momo pāpāho rerekē.
Ka taea hoki te whakamahi hei kawe i ngā wai pāmahana teitei, pēhanga teitei rānei, pērā i te mamaoa, te wai wera rānei, ā, e whakamahia whānuitia ana i roto i ngā ahumahi hanga matū, hiko, me te mīhini.
ASTM A106 Tau A
DIN 17175 St35.8
DIN 1629 St37.0
BS 3059-1 Tau 320
EN 10216-1 P235GH
GB 3087 20#
GB 5310 20G
Ahakoa he rite te hanganga matū me ngā āhuatanga taketake o ēnei rauemi, ka pā pea ngā tukanga maimoatanga wera me te miihini ki ngā āhuatanga o te hua whakamutunga.
Nō reira, me whakahaere ngā whakatairite taipitopito me ngā whakamātautau tika i te wā e whiriwhiri ana i ngā rauemi ōrite mō ngā mahi whaihua.
Mai i tōna whakatūnga i te tau 2014, kua noho a Botop Steel 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. He maha ngā momo paipa maitai waro me ngā hua e pā ana ki tēnei kamupene, tae atu ki ngā paipa maitai kore hononga, 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.
