Mochini oa ho etsa lipeipi tse etsang lisekoere o bulang foreimi oa ZTZG, mohala oa ho etsa lipeipi tse arolelanang lirola ka botlalo, ke mokhoa oa tlhahiso ea lipeipi tse kopantsoeng o etselitsoeng ho hlahisa lipeipi tse nyane ho isa ho tse mahareng (limithara tse 40-150 tsa lisekoere).
Lirolara li hokahantsoe le foreimi ka li-flange. Ho tsamaisa foreimi ho fetola boemo ba lirolara. Ho fetola pakeng tsa litlhaloso tse fapaneng tsa sehlahisoa ho finyelloa ka ho fetola ho buloa le ho koaloa ha foreimi ka enjene le sesebelisoa sa ho fokotsa.
Ka hona, litlhaloso tsa tlhahiso li ka fetoloa ntle le ho fetola lirolara.
Mochini oa ho etsa tube o etsang lisekoere o bulang foreimi oa ZTZG, mohala oa ho etsa tube o arolelanang lirola ka botlalo, o na le sebopeho se ntlafetseng sa ts'ebetso se etsang hore yuniti ea mochini e be nyane le e tsitsitseng haholoanyane, e fokotsa litšenyehelo tsa lirola, le ho ntlafatsa katleho ea tlhahiso. Liphetoho tse entsoeng ka mechini li boetse li fella ka li-tube tse felileng ka nepo e phahameng.
Mohala oa tlhahiso ea phaephe e kobehileng e etsang lisekoere tse otlolohileng tsa ZTZG o sebelisitsoe haholo ke bahlahisi ba lipeipi tse ngata 'me o fumane thoriso e kholo ho tsoa ho basebelisi. Haeba le uena u moetsi ea hlahisang lipeipi tse nyane ho isa ho tse mahareng ka litlhaloso tse ngata ka lihlopha tse nyane, u amohelehile ho re etela le ho buisana le rona.
| MELAO EA TŠEBELETSO EA TUBE EA ERW | |||||
| Mohlala | Rphaephe ea lebota mm | Sekwerephaephe mm | Botenya mm | Mosebetsi o potlakileng m/motsotso | |
| ERW20 | Ф8-Ф20 | 6x6-15×15 | 0.3-1.5 | 120 | Bala haholoanyane |
| 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 | Bala haholoanyane |
| ERW660 | Ф325-Ф660 | 250×250-500×500 | 6.0-20.0 | 20 | Bala haholoanyane |
| ERW720 | Ф355-Ф720 | 300×300-600×600 | 6.0-22.0 | 20 | Bala haholoanyane |
| TLHAHISO EA PIPE EA TŠEPE E SA KHALE | |||||
| Mohlala | Rphaephe ea lebota mm | Sekwerephaephe mm | Botenya mm | Lebelo la ho sebetsa m/motsotso | |
| SS25 | Ф6-Ф25 | 5×5-20×20 | 0.2-0.8 | 10 | Bala haholoanyane |
| SS32 | Ф6-Ф32 | 5×5-25×25 | 0.2-1.0 | 10 | Bala haholoanyane |
| SS51 | Ф9-Ф51 | 7×7-40×40 | 0.2-1.5 | 10 | Bala haholoanyane |
| SS64 | Ф12-Ф64 | 10×10-50×50 | 0.3-2.0 | 10 | Bala haholoanyane |
| SS76 | Ф25-Ф76 | 20×20-60×60 | 0.3-2.0 | 10 | Bala haholoanyane |
| SS114 | Ф38-Ф114 | 30×30-90×90 | 0.4-2.5 | 10 | Bala haholoanyane |
| SS168 | Ф76-Ф168 | 60×60-130×130 | 1.0-3.5 | 10 | Bala haholoanyane |
| SS219 | Ф114-Ф219 | 90×90-170×170 | 1.0-4.0 | 10 | Bala haholoanyane |
| SS325 | Ф219-Ф325 | 170×170-250×250 | 2.0-8.0 | 3 | Bala haholoanyane |
| SS426 | Ф219-Ф426 | 170×170-330×330 | 3.0-10.0 | 3 | Bala haholoanyane |
| SS508 | Ф273-Ф508 | 210×210-400×400 | 4.0-12.0 | 3 | Bala haholoanyane |
| SS862 | Ф508-Ф862 | 400×400-600×600 | 6.0-16.0 | 2 | Bala haholoanyane |