Ha o etsa liphaephe tse chitja tsa litlhaloso tse fapaneng, liforomo tsa karolo e etsang karolo ea mochini oa rona oa liphaephe tsa Erw kaofela lia arolelanoa 'me li ka fetoloa ka bohona. Sena se bolela hore ha ho hlokahale hore u fetole liforomo bakeng sa boholo bo fapaneng ba liphaephe, e leng se u bolokelang nako le boiteko bo boholo. Theknoloji ea rona e tsoetseng pele e netefatsa hore ts'ebetso ea tokiso ha e na sekoli ebile e nepahetse, e lumella bokhoni bo phahameng le boleng bo tsitsitseng moleng oa hau oa tlhahiso.
Ha o etsa liphaephe tse sekwere tsa litlhaloso tse fapaneng, liforomo tsa karolo ea ho bopa le ho lekanya ea mochini oa rona oa liphaephe tsa Erw le tsona lia arolelanoa 'me li ka fetoloa ka bohona. Tšobotsi ena e ncha e felisa tlhoko ea li-mold tse ngata le liphetoho tse rarahaneng tsa letsoho, e leng se ntlafatsang katleho ea hau ea ts'ebetso. Ka ho sebelisa mochini oa rona oa liphaephe tsa Erw, u ka hlahisa liphaephe tse fapaneng tsa sekwere kapele le ka bonolo, u boloka maemo a tšoanang a holimo a ho nepahala le boleng.
Ka ho amohela mochini oa rona oa Erw tube oa sejoale-joale, u ka boloka nako le chelete e ngata. Tšobotsi ea ho lokisa ka boiketsetso ha e fokotse nako ea ho sebetsa feela empa hape e fokotsa litšenyehelo tsa basebetsi le tlhoko ea thepa e eketsehileng ea hlobo. Sena se etsa hore lisebelisoa tsa rona e be khetho e ntle bakeng sa bahlahisi ba batlang ho ntlafatsa lits'ebetso tsa bona tsa tlhahiso le ho fokotsa litšenyehelo tsa ts'ebetso.
Joale u tsilatsila eng? Mochini oa rona oa li-tube oa Erw o fana ka boiketlo bo ke keng ba bapisoa le ho boloka litšenyehelo, ho netefatsa hore mohala oa hau oa tlhahiso o sebetsa ka katleho e kholo. Tsetela theknolojing ea rona kajeno 'me u latsoe melemo ea lipotoloho tse potlakileng tsa tlhahiso, litšenyehelo tse tlase, le boleng bo holimo ba sehlahisoa. U se ke ua fetoa ke monyetla oa ho fetola ts'ebetso ea hau ea tlhahiso ea liphaephe ka mochini oa rona oa li-tube oa Erw o tsoetseng pele. Ikopanye le rona hona joale ho ithuta ho eketsehileng le ho nka mohato oa pele ho ea mohala oa tlhahiso o sebetsang hantle le o nang le phaello.
| 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 |