1. Ko ngā paipa maitai kore hononga whānui ka hurihia mai i te maitai hanganga waro noa, te maitai hanganga koranu iti, te maitai hanganga koranu rānei, e ai ki te rauemi. Hei tauira, ko ngā paipa kore hononga i hangaia mai i te maitai waro iti pēnei i te Nama 10 me te Nama 20 ka whakamahia whānuitia hei paipa kawe mō te mamaoa, te hau waro, te hau wai, te hau māori, ngā momo hua hinu me ētahi atu hau, wai rānei; ko te maitai waro waenga pēnei i te 45 me te 40Cr. Ko ngā paipa kore hononga i hangaia ka whakamahia whānuitia hei hanga i ngā momo wāhanga mīhini me ngā hononga paipa.

2. Ka tukuna hoki ngā paipa maitai tui kore mō ngā mahi whānui i runga i te hanganga matū me ngā āhuatanga miihini, me te whakamātautau waipēhi. Me paahitia e ngā paipa maitai tui kore e mau ana i te pēhanga waipēhi te whakamātautau pēhanga waipēhi.

3. Ka whakamahia ngā paipa tuimotu motuhake i roto i ngā kohua, te tūhura whenua, ngā peera, te ātete waikawa, me ētahi atu. Pērā i te paipa keri whenua hinu.API 5CTJ55, K55, N80, L80, P110, me ētahi atu, ngā paipa pakaru me ngā paipa kōhua ​​mō te umanga hinu matū.

Ngā paipa maitai tuitui hangangae whakamahia ana mō ngā hanganga whānui me ngā hanganga mīhini. Ko ōna rauemi e tohu ana (ngā taumata): maitai waro Nama 20, maitai Nama 45; maitai koranu Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, me ētahi atu.

Ko ngā paipa rino kore-tuitui mō te kawe wai, e whakamahia ana mō te kawe i ngā paipa wai i roto i ngā taputapu hangarau me ngā taputapu nui. Ko ngā rauemi e tohu ana (ngā taumata) ko te 20, te Q345, me ētahi atu.

Ngā paipa maitai kore-tuitui mō te pēhanga iti me te pēhanga waengangā kohuae whakamahia ana mō ngā paipa e kawe ana i ngā wai pēhanga iti me te pēhanga waenga i roto i ngā kohua ahumahi me ngā kohua kāinga. Ko ngā rauemi matua ko te maitai 10 me te 20.

Ngā paipa maitai kore-tuitui mōngā kohua pēhanga teiteie whakamahia ana mō ngā pane me ngā paipa kawe wai pāmahana teitei me te pēhanga teitei i roto i ngā kohua tipu hiko me ngā tipu hiko karihi. Ko ngā rauemi e tohu ana ko te 20G, 12Cr1MoVG, 15CrMoG, me ētahi atu.

Ngā paipa maitai kore-tuitui mōtongi pēhanga teiteiKo te nuinga o ngā taputapu e whakamahia ana hei kawe i ngā paipa wai pāmahana teitei me te pēhanga teitei i runga i ngā taputapu tongi. Ko ngā rauemi e tohuhia ana ko te 20, 16Mn,12CrMo, 12Cr2Mo, me ētahi atu

Ko ngā paipa maitai kore-tui mō te pakaru hinu e whakamahia nuitia ana i roto i ngā kohua, ngā whakawhiti wera me ngā paipa kawe wai i roto i ngā whare whakarewa hinu. Ko ōna rauemi e tohu ana ko te 15mog, 15CrMoG, 12crmog, me ētahi atu.

Ko ngā paipa maitai kore-tuitui mō ngā rango hau e whakamahia nuitia ana hei hanga i ngā momo rango hau me ngā rango waipēhi. Ko ōna rauemi e tohu ana ko te 37Mn, 34Mn2V, 35CrMo, me ētahi atu.

Ko ngā paipa rino kore-honohono kua hurihia werahia e whakamahia ana mō ngā tautoko waipēhi, e whakamahia ana mō te hanga tautoko waipēhi, rango me ngā pou i roto i ngā maina waro, tae atu ki ētahi atu rango me ngā pou waipēhi. Ko ōna rauemi e tohu ana ko te 20, 45, 27SiMn, me ētahi atu.

Ko ngā paipa maitai tino pai, he mea kumea matao, he mea hurihuri matao rānei, e whakamahia ana mō ngā hanganga mīhini me ngā taputapu pēhi waro, e hiahia ana kia tino tika te āhua me te whakaotinga mata pai. Ko ōna rauemi e tohu ana ko te maitai 20, 45, me ētahi atu.

Ko ngā paipa maitai kore-hono e tōia ana i te makariri me ngā paipa maitai āhua motuhake e whakamahia ana mō te hanga i ngā wāhanga hanganga me ngā wāhanga rerekē. He mea hanga ēnei ki te maitai hanganga waro kounga teitei me te maitai hanganga koranu iti.

Ko ngā paipa maitai tuimotu tino tika mō ngā rango waipēhi me te hau, e whakamahia ana hei hanga i ngā paipa maitai tuimotu e tōia ana i te makariri, e hurihia ana rānei i te makariri, me ngā diameter o roto tino tika mō ngā rango waipēhi me te hau. Ko ngā rauemi e tohu ana i tēnei ko te maitai 20, 45, me ētahi atu.