He tapawha te wahanga kowhao me te wahanga porohita (wahanga porowhita porowhita).Ko te rauemi he here waro maitai whakataka makariri me te matotoru o te pakitara 0.6mm ki te 2.0mm.I te wa e whakamahanahia ana te whitiki rino matao ki te wera whakaene, ka mangu te tae o te mata na te nui o te paanga ki te hau, e kiia nei ko te tihorea pango.Ka ngohe nga ahuatanga o te tinana, he pai mo te whakapiri atu ki te hanga paipa maitai.Ko te pakeke noa ko 57HRB, a ka taea hoki te whakaheke ki te pakeke rereke ina hiahiatia.
Ko te rauemi putorino maitai he waro waro iti-kore.Ko te tikanga hangarau hanga paipa ko te ERW kua paiherea ki te tui roa.Ka taea e nga paerewa hua te whai ki te ASTM A500, ASTM A53, ASTM A795, BS1387, BS EN10255, EN 10219, BS 1139, BS 39.