ASTM A179 (ASME SA179) he ngongo maitai kore-piri waro-iti, he mea kume matao hei whakamahi i roto i ngā whakawhiti wera ngongo, ngā whakapūmau wera, me ngā tono whakawhiti wera rite.
He rite tonu ngā paerewa e rua, arā, ko te ASTM A179 me te ASME SA179. Hei whakangāwari ake, ka whakamahia te ASTM A179 i raro nei.
He pai te ASTM A179 mō ngā paipa maitai me te diameter o waho o te 1/8″ – 3″ [3.2mm - 76.2mm].
Botop Steelhe kaihoko paipa rino tui kore hononga mai i Haina, e tuku ana i te whānuitanga o ngā paipa rino tui kore hononga kounga teitei ASTM A179/ASME SA179.
E whakapau kaha ana mātou ki te whakarato i ngā hua me ngā ratonga kounga teitei ki ō mātou kiritaki kia pai ai te haere o ā koutou kaupapa. Kōwhiria a Botop Steel, ā, whiriwhiria he hoa pono.
Kua kōrero kē mātou ka hangaia te A179 mā te whakamahi i te tukanga hanga tui-makariri. He aha ngā tukanga motuhake e uru ana ki te hanga tui-makariri? Tirohia te tūtohi rere o te tukanga e whai ake nei.
I roto i te paerewa ASTM,A556e whakamahi ana hoki i te tukanga hanga kore-whakairo matao engari he mea hanga motuhake mō ngā whakamahana wai ngongo. Mēnā he hiahia, ka taea e te hunga e hiahia ana te rapu atu i ētahi atu kōrero.
I muri i te tango matao whakamutunga, ka whakamahanahia ngā ngongo maitai ki te pāmahana o te 650°C, neke atu rānei.
| Paerewa | C | Mn | P | S |
| ASTM A179 | 0.06-0.18% | 0.27-0.63% | 0.035% te mōrahi | 0.035% te mōrahi |
Kāore e whakaaetia e te ASTM A179 te tāpiri i ētahi atu huānga ki te hanganga matū.
Kaua te pakeke o te ngongo maitai e neke ake i te 72 HRBW (pakaritanga Rockwell).
| Te kaha o te kume | Te kaha o te hua | Te whakaroa | Whakamātautau Whakapapatahi | Whakamātautau Mura | Whakamātautau Flange |
| meneti | meneti | i roto i te 2 inihi, 50 mm rānei, min | |||
| 47 ksi [325 MPa] | 26 ksi [180 MPa] | 35% | Tirohia te ASTM A450, Wāhanga 19 | Tirohia te ASTM A450, Wāhanga 21 | Tirohia te ASTM A450, Wāhanga 22 |
Me whakamātau te pēhanga waipēhi i ia paipa, ki te hiahiatia rānei e te kaihoko, ka taea te whakamahi i te whakamātautau hiko kore-whakangaro hei utu.
Ka mau te pēhanga o te ngongo maitai mō te iti rawa i te 5 hēkona, me te kore e turuturu.
Ka tatauhia te pēhanga whakamātautau mā te whakamahi i te tātai e whai ake nei:
Ngā Wāhanga Inihi - Pauna: P = 32000 t/D
Ngā Wāhanga SI: P = 220.6t/D
P = te pēhanga whakamātautau wai ātete, psi, MPa rānei;
t = te matotoru o te pakitara kua tohua, in. mm rānei;
D = te diameter o waho kua tohua, in. mm rānei.
Ko te mea e whai ake nei he takai A179 noa, ā, ka taea hoki te whakarato i ngā takai ritenga kia rite ki ngā whakaritenga o te kaupapa.
Paipa tahanga, paninga pango (kua whakaritea);
Ngā rahi 6" me raro iho. Kei roto i ngā paihere me ngā taura miro e rua, ko ētahi atu rahi he rahi korekore;
He parenga pito kei ngā pito e rua;
Pito noa, pito piko;
Te tohu.
