Ko te ASTM A252 he paerewa i hangaia mō te whakamahi me ngā paipa puranga maitai.
E pā ana te ASTM A252 ki ngā puranga paipa kei reira te rango maitai e mahi ana hei mema pikau kawenga tuturu, hei anga rānei hei hanga puranga raima kua maka-ki-te-tūnga.
Ko te Taumata 2 me te Taumata 3 ētahi o ēnei taumata.
Kua wehea te A252 kia toru ngā taumata me ngā āhuatanga miihini kua whakareihia i ia raupapa.
Ko ēnei: Tau 1, Tau 2, meTau 3.
Ko te Taumata 2 me te Taumata 3 ngā taumata e whakamahia whānuitia ana i roto i te ASTM A252, ā, ka whakamāramahia e mātou ngā āhuatanga o ngā taumata e rua i muri mai.
ASTM A252ka taea te hanga mā te whakarewa tuimotu, te whakarewa ātete, te whakarewa uira, te tukanga whakarewa hanumi rānei.
I roto i ngā mahi puranga paipa, he tino pai te tautoko a ngā ngongo maitai tui kore nā te mea he kaha teitei me ngā āhuatanga kaha ōrite.
Hei tāpiritanga, ka taea te hanga i ngā ngongo maitai tui he matotoru rawa te pakitara, e āhei ai rātou ki te tu atu i ngā ahotea nui ake, ā, ka nui ake te pono o ngā hanganga tautoko.
Kaua te nui o te whākawakawa e neke ake i te 0.050%.
Kāore he mea e hiahiatia ana mō ētahi atu huānga.
Te Kaha Kume me te Kaha Tuku, te Pūwāhi Tuku rānei
| Tau 2 | Tau 3 | |
| Kaha kume, min | 60000 psi[415 MPa] | 60000 psi[415 MPa] |
| Te pūwāhi hua, te kaha hua rānei, min | 35000 psi[240 MPa] | 45000 psi[310 MPa] |
Te whakaroa
Ka kitea ngā taipitopito motuhake i roto iNgā Taipitopito Paipa Puranga ASTM A252.
| Rārangi | Kōmaka | Whānuitanga |
| Taumaha | Taumaha Ariā | 95% - 125% |
| Diameter o Waho | Diameter o Waho kua Tauwhāitihia | ± 1% |
| Matotoru o te Pakitara | te matotoru o te pakitara ingoa kua tohua | iti rawa 87.5% |
| Ngā roa matapōkere takitahi | 16 ki te 25 putu [4.88 ki te 7.62 m], inihi |
| Ngā roa matapōkere takirua | neke atu i te 25 putu [7.62 m] me te toharite iti rawa o te 35 putu [10.67 m] |
| Ngā roa ōrite | te roa e ai ki te tohu me te rerekētanga e whakaaetia ana o te ±1 inihi. |
ASTM A370: Ngā Tikanga Whakamātautau me ngā Whakamāramatanga mō te Whakamātautau Ā-ringa o ngā Hua Rino;
ASTM A751: Ngā Tikanga Whakamātautau, Ngā Mahi, me Ngā Kupu mō te Tātari Matū o ngā Hua Rino;
ASTM A941: Ngā Kupu e Pā Ana ki te Rino, te Rino Kowiri tira, ngā Koranu e Pā Ana, me ngā Koranu Ferro;
ASTM E29: Te Mahi mō te Whakamahi i ngā Mati Matua i roto i ngā Raraunga Whakamātautau hei Whakatau i te Whakatutukitanga ki ngā Whakatakotoranga;
He kaihanga me te kaiwhakarato paipa maitai waro kounga teitei a Botop Steel mai i Haina, ā, he toa paipa maitai kore hononga hoki, e tuku ana i te whānuitanga o ngā otinga paipa maitai!
