Ina hangaia e koe he paipa porowhita o ngā whakaritenga rerekē, ka tohaina katoatia ngā pokepokea mō te wāhanga hanga o tā mātou mira ngongo ERW, ā, ka taea te whakarite aunoa. Mā tēnei āhuatanga matatau ka taea e koe te whakawhiti i waenga i ngā rahi paipa rerekē me te kore e hiahiatia te whakawhiti ā-ringa i ngā pokepokea. Whakaarohia te wā me te kaha ka penapenahia e koe mā te karo i te raruraru o te whakawhiti pokepokea maha.
Kua hangaia tā mātou mira ngongo ERW me te whai whakaaro ki te whai huatanga me te whai wāhi ki te mahi. Mā te āheinga whakarite aunoa ka maeneene ake, ka māmā ake hoki tō tukanga whakaputa. Ehara i te mea ka penapena i te wā whakaputa nui māu, engari ka whakaitihia hoki te wā kore mahi e pā ana ki ngā whakarerekētanga ā-ringa. Ko te hua o tēnei whai huatanga he penapena utu, nā te mea he iti ake te wā e pau ana ki ngā whakatikatika, ā, he nui ake te wā e whakatapua ana ki te whakaputanga tuturu.
Hei tāpiri, ka whakaitihia e te pūnaha pokepokea tahi te hiahia mō te nui o ngā pokepokea rerekē, he mea utu nui, he mea whakapau wāhi hoki. Mā tā mātou mira ngongo ERW, he iti noa ngā pokepokea e hiahiatia ana e koe hei whakahaere i te whānuitanga o ngā whakaritenga paipa. Ehara i te mea ka penapena moni koe i te hoko pokepokea tāpiri engari ka wātea hoki te wāhi rokiroki i roto i tō whare.
| RAINA MIRA NGONGO ERW | |||||
| Tauira | Rpaipa porowhita mm | Tapawhāpaipa mm | Matotoru mm | Te tere mahi m/min | |
| ERW20 | F8-F20 | 6x6-15×15 | 0.3-1.5 | 120 | Pānuihia atu |
| ERW32 | Ф10-Ф32 | 10×10-25×25 | 0.5-2.0 | 120 | |
| ERW50 | Ф20-Ф50 | 15×15-40×40 | 0.8-3.0 | 120 | |
| ERW76 | Ф32-Ф76 | 25×25-60×60 | 1.2-4.0 | 120 | |
| ERW89 | Ф42-Ф89 | 35×35-70×70 | 1.5-4.5 | 110 | |
| ERW114 | Ф48-Ф114 | 40×40-90×90 | 1.5-4.5 | 65 | |
| ERW140 | Ф60-Ф140 | 50×50-110×110 | 2.0-5.0 | 60 | |
| ERW165 | Ф76-Ф165 | 60×60-130×130 | 2.0-6.0 | 50 | |
| ERW219 | Ф89-Ф219 | 70×70-170×170 | 2.0-8.0 | 50 | |
| ERW273 | Ф114-Ф273 | 90×90-210×210 | 3.0-10.0 | 45 | |
| ERW325 | Ф140-Ф325 | 110×110-250×250 | 4.0-12.7 | 40 | |
| ERW377 | Ф165-Ф377 | 130×130-280×280 | 4.0-14.0 | 35 | |
| ERW406 | Ф219-Ф406 | 170×170-330×330 | 6.0-16.0 | 30 | |
| ERW508 | Ф273-Ф508 | 210×210-400×400 | 6.0-18.0 | 25 | Pānuihia atu |
| ERW660 | Ф325-Ф660 | 250×250-500×500 | 6.0-20.0 | 20 | Pānuihia atu |
| ERW720 | Ф355-Ф720 | 300×300-600×600 | 6.0-22.0 | 20 | Pānuihia atu |
| RAINA HANGA PAIPA KOWHERO RINO | |||||
| Tauira | Rpaipa porowhita mm | Tapawhāpaipa mm | Matotoru mm | Tere mahi m/min | |
| SS25 | Ф6-Ф25 | 5×5-20×20 | 0.2-0.8 | 10 | Pānuihia atu |
| SS32 | Ф6-Ф32 | 5×5-25×25 | 0.2-1.0 | 10 | Pānuihia atu |
| SS51 | Ф9-Ф51 | 7×7-40×40 | 0.2-1.5 | 10 | Pānuihia atu |
| SS64 | Ф12-Ф64 | 10×10-50×50 | 0.3-2.0 | 10 | Pānuihia atu |
| SS76 | Ф25-Ф76 | 20×20-60×60 | 0.3-2.0 | 10 | Pānuihia atu |
| SS114 | Ф38-Ф114 | 30×30-90×90 | 0.4-2.5 | 10 | Pānuihia atu |
| SS168 | Ф76-Ф168 | 60×60-130×130 | 1.0-3.5 | 10 | Pānuihia atu |
| SS219 | Ф114-Ф219 | 90×90-170×170 | 1.0-4.0 | 10 | Pānuihia atu |
| SS325 | Ф219-Ф325 | 170×170-250×250 | 2.0-8.0 | 3 | Pānuihia atu |
| SS426 | Ф219-Ф426 | 170×170-330×330 | 3.0-10.0 | 3 | Pānuihia atu |
| SS508 | Ф273-Ф508 | 210×210-400×400 | 4.0-12.0 | 3 | Pānuihia atu |
| SS862 | Ф508-Ф862 | 400×400-600×600 | 6.0-16.0 | 2 | Pānuihia atu |