Ko te rerekētanga matua e pā ana ki ēnei āhuatanga ahumahi e rua ko tā rāua tukanga hanga e tino pā ana ki ō rāua āhuatanga miihini.
1. Ngā Paipa Rino Kore-Tuitui (ERW / SMLS)
Kāore he hononga whakarewa, he hononga rānei o ngā paipa kore hononga. Ko te tikanga ka hangaia mā te tukanga hurihuri wera, mā te tukanga kukume makariri rānei, ka pokaia he maitai porowhita totoka ki waenganui i te pāmahana teitei.
Painga MatuaNā te mea kāore he hononga honohono o ngā paipa tuitui, he ōrite te hanganga o te paipa tuitui puta noa i te roanga o te paipa. Mā tēnei ka kore e taea te "raru hononga", te wāhi tino pāngia o tētahi paipa tuitui.
Ahu NoaKo ngā inenga o tēnei hua e wātea ana i te nuinga o te wā e ai kiAPI 5L (paipa raina),ASTM A106, meASTM A53(mō ngā whakamahinga pāmahana teitei).
2. Ngā Paipa Rino Whakarewa (ERW, LSAW, SSAW)
He mea hanga ngā paipa whakarewa mai i te pereti maitai papatahi, i te rīpene rānei (koiri) kua hangaia kia porowhita. Kātahi ka whakarewahia ngā taha mā te tikanga whakarewa pūngao-teitei. Ko ētahi momo ko te Whakarewa Ātete Hiko (ERW), Te Whakarewa Āwhata Ruku Roa (LSAW), Te Whakarewa Āwhata Porowhita Rukuhia (SSAW).
Painga MatuaNā te hangarau matatau kua tino whakarei ake te pono o te hononga whakarewa. Kei te wātea hoki ngā paipa whakarewa i ngā rahi nui atu i ngā paipa kore-whakarewa, kia pai ake ai te hoahoa me te ngāwari o te whakamahinga.
Ahu NoaE hangai ana ki te ASTM A53, API 5L me te maha atu o ngā whakaritenga hanganga ā-rohe.
