ZTZG molam tuborum ERW formantem capite Turkiano ob problema reductionis crassitudinis parietis molae tuborum ERW rotundae ad quadratae conventionalis in tubis quadratis elaboravit.
Haec ratio efficit ut eadem machinarum copia adhibita sit ad tubos rotundos et quadratos eadem crassitudine parietis producendos, et solum capita Turcica addita. Ratio "Türkiye first" (primum impulsum in Turcia) a societate nostra elaborata haec commoda habet:
1. Possuntne tubi quadrati ab unitatibus eiusdem exemplaris producti eandem crassitudinem parietis quam tubi rotundi consequi?
2. Simul, scalpendi tuborum ferreorum a laminatore minuit;
3. Quattuor reliquae superficies simul vi subiciuntur, quo fit ut tubus ferreus formatus pulchrior fiat;
4. Hic processus facile operatur, laborem operariorum minuit et efficientiam operis auget;
5. Maximum huius processus commodum est quod cylindros conservat;
6. Libere positionem suturae torquere potes.
| Linea Molae Tubularis ERW | |||||
| Modellum | Rtubus rotundus mm | Quadratumfistula mm | Crassitudo mm | Celeritas laboris m/min | |
| ERW20 | Ф8-Ф20 | 6x6-15×15 | 0.3-1.5 | CXX | Plura Lege |
| ERW32 | Ф10-Ф32 | 10×10-25×25 | 0.5-2.0 | CXX | |
| ERW50 | Ф20-Ф50 | 15×15-40×40 | 0.8-3.0 | CXX | |
| ERW76 | Ф32-Ф76 | 25×25-60×60 | 1.2-4.0 | CXX | |
| 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 | |
| REG (vel fortasse "ERW")273 | 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 | Plura Lege |
| ERW660 | Ф325-Ф660 | 250×250-500×500 | 6.0-20.0 | 20 | Plura Lege |
| ERW720 | Ф355-Ф720 | 300×300-600×600 | 6.0-22.0 | 20 | Plura Lege |
| LINEA PRODUCTIONIS TUBORUM CHALYBIS INOXIDABILIS | |||||
| Modellum | Rtubus rotundus mm | Quadratumfistula mm | Crassitudo mm | Celeritas laboris m/min | |
| SS25 | Ф6-Ф25 | 5×5-20×20 | 0.2-0.8 | 10 | Plura Lege |
| SS32 | Ф6-Ф32 | 5×5-25×25 | 0.2-1.0 | 10 | Plura Lege |
| SS51 | Ф9-Ф51 | 7×7-40×40 | 0.2-1.5 | 10 | Plura Lege |
| SS64 | Ф12-Ф64 | 10×10-50×50 | 0.3-2.0 | 10 | Plura Lege |
| SS76 | ФXXV-Ф76 | 20×20-60×60 | 0.3-2.0 | 10 | Plura Lege |
| SS114 | ФXXXVIII-Ф114 | 30×30-90×90 | 0.4-2.5 | 10 | Plura Lege |
| SS168 | Ф76-ФCLXVIII | 60×60-130×130 | 1.0-3.5 | 10 | Plura Lege |
| SS219 | Ф114-Ф219 | 90×90-170×170 | 1.0-4.0 | 10 | Plura Lege |
| SS325 | Ф219-Ф325 | 170×170-250×250 | 2.0-8.0 | 3 | Plura Lege |
| SS426 | Ф219-Ф426 | 170×170-330×330 | 3.0-10.0 | 3 | Plura Lege |
| SS508 | Ф273-Ф508 | 210×210-400×400 | 4.0-12.0 | 3 | Plura Lege |
| SS862 | Ф508-ФDCCCLXII | 400×400-600×600 | 6.0-16.0 | 2 | Plura Lege |