Cov khoom siv vuam yeeb nkab hom rooj uas hloov tau sai siv cov thev naus laus zis "hloov rooj" tsis siv neeg los tsim cov yeeb nkab puag ncig thiab plaub fab ntawm ntau qhov ntau thiab tsawg ntawm ib lub yeeb nkab vuam.
Thaum cov neeg siv khoom xav tau kev tsim cov yeeb nkab sib txawv, lub rooj hloov pauv sai rau kev tsim thiab ntsuas cov yob tuaj yeem hloov pauv sai raws li qhov loj me thiab tuab ntawm cov yeeb nkab.
| ERW TUBE MILL LINE | |||||
| Qauv | Ryeeb nkab puag ncig mm | Plaub fabyeeb nkab mm | Qhov tuab mm | Kev ua haujlwm ceev m/feeb | |
| ERW 20 | Ф8-Ф20 | 6x6-15 × 15 | 0.3-1.5 | 120 | Nyeem Ntxiv |
| ERW32 | Ф10-Ф32 | 10 × 10-25 × 25 | 0.5-2.0 | 120 | |
| ERW50 | Ф20-Ф50 | 15 × 15-40 × 40 | 0.8-3.0 | 120 | |
| SIB 76 | 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 | |
| ERW 377 | 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 | Nyeem Ntxiv |
| ERW660 | Ф325-Ф660 | 250 × 250-500 × 500 | 6.0-20.0 | 20 | Nyeem Ntxiv |
| ERW720 | Ф355-Ф720 | 300 × 300-600 × 600 | 6.0-22.0 | 20 | Nyeem Ntxiv |
| Cov Kab Ntau Lawm Yeeb Nkab Hlau Stainless | |||||
| Qauv | Ryeeb nkab puag ncig mm | Plaub fabyeeb nkab mm | Qhov tuab mm | Ua haujlwm ceev m/feeb | |
| SS25 | Ф6-Ф25 | 5 × 5-20 × 20 | 0.2-0.8 | 10 | Nyeem Ntxiv |
| SS32 | Ф6-Ф32 | 5 × 5-25 × 25 | 0.2-1.0 | 10 | Nyeem Ntxiv |
| SS51 | Ф9-Ф51 | 7 × 7-40 × 40 | 0.2-1.5 | 10 | Nyeem Ntxiv |
| SS64 | Ф12-Ф64 | 10 × 10-50 × 50 | 0.3-2.0 | 10 | Nyeem Ntxiv |
| SS76 | Ф25-Ф76 | 20 × 20-60 × 60 | 0.3-2.0 | 10 | Nyeem Ntxiv |
| SS114 | Ф38-Ф114 | 30 × 30-90 × 90 | 0.4-2.5 | 10 | Nyeem Ntxiv |
| SS168 | Ф76-Ф168 | 60 × 60-130 × 130 | 1.0-3.5 | 10 | Nyeem Ntxiv |
| SS219 | Ф114-Ф219 | 90 × 90-170 × 170 | 1.0-4.0 | 10 | Nyeem Ntxiv |
| SS325 | Ф219-Ф325 | 170 × 170-250 × 250 | 2.0-8.0 | 3 | Nyeem Ntxiv |
| SS426 | Ф219-Ф426 | 170 × 170-330 × 330 | 3.0-10.0 | 3 | Nyeem Ntxiv |
| SS508 | Ф273-Ф508 | 210 × 210-400 × 400 | 4.0-12.0 | 3 | Nyeem Ntxiv |
| SS862 | Ф508-Ф862 | 400 × 400-600 × 600 | 6.0-16.0 | 2 | Nyeem Ntxiv |