| Productum | Tubus Chalybis Carbonis |
| Forma | Sectio Cava Rotunda Sectio Cava Quadrata et Rectangularis |
| Materia | Chalybs Carbonicus |
| Gradus | Q195 = S195 / A53 Gradus A Q235 = S235 / A53 Gradus B / A500 Gradus A / STK400 / SS400 / ST42.2 Q355 = S355JR / A500 Gradus B Gradus C |
| Normae Tuborum Ferreorum Rotundorum | ASTM A53, API 5L, ASTM A252, ASTM A795, ISO65, DIN2440, BS1387, BS1139, EN10255, EN39, JIS3444, GB/T 3091 et GB/T13793. |
| Normae Tuborum Ferreorum Quadratorum | ASTM A500, A36, EN10219, EN10210,GB/T 6728,JIS G3466 |
| Superficies | 1. Nudum/Naturale Nigrum 2. Colore Picto 3. Unctum cum vel sine involuto 4. Galvanizatum / Zinco Obductum |
| Finis | Fines planae |
| Fines Speciales | Extremitates tuborum ferreorum rotundorum: filis, obliquis, sulcis; Extremitates tuborum ferreorum rotundorum serrae: obliquae |
Applicatio:
1. Campus Structurae:
Tubus ferreus constructionis / materiarum aedificandarum
Tubus structurae
Tubus ferreus postis saepis
Partes adfixionis solaris
Tubus manubrii
Tubus scaffolding
Tubus ferreus tepidarii
2. Campus Circulationis:
Tubus ferreus ignis praesidii
Liquor pressionis humilis, aqua, gas, oleum, tubus linearis
Tubus irrigationis
| Tabula magnitudinis tubi chalybis rotundi ERW conglutinati | |||||||||
| DN | OD | ASTM A53 GRA/B | ASTM A795 GRA/B | BS1387 EN10255 | |||||
| SCH10S | STD SCH40 | SCH10 | SCH30 SCH40 | LUX | MEDIUM | GRAVIS | |||
| MM | UNCIA | MM | (mm) | (mm) | (mm) | (mm) | (mm) | (mm) | (mm) |
| 15 | Dimidium unciae | 21.3 | 2.11 | 2.77 | - | 2.77 | 2 | 2.6 | - |
| 20 | Tres quartae unciae | 26.7 | 2.11 | 2.87 | 2.11 | 2.87 | 2.3 | 2.6 | 3.2 |
| 25 | 1" | 33.4 | 2.77 | 3.38 | 2.77 | 3.38 | 2.6 | 3.2 | 4 |
| 32 | 1-1/4" | 42.2 | 2.77 | 3.56 | 2.77 | 3.56 | 2.6 | 3.2 | 4 |
| 40 | Unciae 1-1/2 | 48.3 | 2.77 | 3.68 | 2.77 | 3.68 | 2.9 | 3.2 | 4 |
| 50 | Duo" | 60.3 | 2.77 | 3.91 | 2.77 | 3.91 | 2.9 | 3.6 | 4.5 |
| 65 | Duae et dimidiae unciae | 73 | 3.05 | 5.16 | 3.05 | 5.16 | 3.2 | 3.6 | 4.5 |
| 80 | Tres" | 88.9 | 3.05 | 5.49 | 3.05 | 5.49 | 3.2 | 4 | 5 |
| 90 | Tres et dimidiae unciae | 101.6 | 3.05 | 5.74 | 3.05 | 5.74 | - | - | - |
| centum | 4" | 114.3 | 3.05 | 6.02 | 3.05 | 6.02 | 3.6 | 4.5 | 5.4 |
| 125 | Quinque" | 141.3 | 3.4 | 6.55 | 3.4 | 6.55 | - | 5 | 5.4 |
| CL | Sex" | 168.3 | 3.4 | 7.11 | 3.4 | 7.11 | - | 5 | 5.4 |
| ducenti | Octo" | 219.1 | 3.76 | 8.18 | 4.78 | 7.04 | - | - | - |
| 250 | Decem" | 273.1 | 4.19 | 9.27 | 4.78 | 7.8 | - | - | - |
| Tabula magnitudinum tuborum ferreorum quadratorum et rectangularium | ||||
| Sectio Quadrata Cava | Sectio Rectangularis Cava | Crassitudo | ||
| 20*20 25*25 30*30 | 20*40 30*40 | 1.2-3.0 | ||
| 40*40 50*50 | 30*50 25*50 30*60 40*60 | 1.2-4.75 | ||
| 60*60 | 50*70 40*80 | 1.2-5.75 | ||
| 70*70 80*80 75*75 90*90 100*100 | 60*80 50*80 100*40 120*80 | 1.5-5.75 | ||
| 120*120 140*140 150*150 | 160*80 100*150 140*80 100*180 200*100 | 2.5-10.0 | ||
| 160*160 180*180 200*200 | 200*150 250*150 | 3.5-12.0 | ||
| 250*250 300*300 400*200 350*350 350*300 | 250*200 300*200 350*200 350*250 450*250 400*300 500*200 | 4.5-15.75 | ||
| 400*400 280*280 450*300 450*200 | 400*350 400*250 500*250 500*300 400*600 | 5.0-20.0 | ||
| Tubus Ferreus Spiraliter Soldatus | |
| Certificatum | Certificatum API 5L |
| Specificatio: | Diameter Externus: 219-2032mm |
| Crassitudo parietis: 5-16mm | |
| Longitudo: 12m vel ad mensuram | |
| Superficies | Nudus / Naturalis niger |
| Galvanizatum | |
| 3PE / FPE | |
| Extremitates Tuborum | Limatus vel Planus |
| Gradus Chalybis | Gradus B / L245, X42, X52, X60 |
Stricta Qualitatis Inspectio:
1) Per productionem et post eam, quattuor periti qualitatis (QC) cum plus quam quinque annorum experientia producta temere inspiciunt.
2) Laboratorium nationale probatum cum libellis CNAS
3) Inspectio acceptabilis a tertia parte a emptore designata/soluta, ut SGS, BV.
4) A Malaysia, Indonesia, Singapura, Philippinis, Australia, Peruvia et Regno Unito probata. Certificata UL /FM, ISO9001/18001, FPC possidemus.
Sarcina et Traditio:
Detalia sarcinandi:
1. Tubus rotundus diametro externo 219mm et infra, tubus quadratus diametro externo 300mm et infra: In fasciculis hexagonalibus navigabiliter aptis, taeniis ferreis convasatis, cum duabus fundis nylon pro singulis fasciculis vel prout requisita clientium sunt;
2. Tubus rotundus supra diametrum externam 219mm, tubus quadratus supra diametrum externam 300mm: in mole;
3. 25 tonnae/continens et 5 tonnae/magnitudine pro mandato experimentali;
4. Pro receptaculo 20" longitudo maxima est 5.8m;
5. Pro receptaculo 40" longitudo maxima est 11.8m.
Rationes traditionis: Pro quantitate, plerumque unus mensis.



De nobis:
Tianjin Youfa Kalendis Iuliis anni MM condita est. In summa, operarii circiter 9000 sunt, tredecim officinae, ducentae nonaginta tres lineae productionis tuborum ferreorum, tres laboratorium nationale probatum, et unum centrum technologiae negotiorum a gubernio Tianjin probatum usque ad annum MMXXII.
YOUFA STEEL PIPE GROUP XIII officinas continet:
Basis Productionis Tianjin—Tianjin Youfa Steel Tube Group Co., Ltd.—Ramus No. 1;
Tianjin Youfa Steel Tube Group Co., Ltd. - Ramus No. 2;
Tianjin Youfa Dezhong Steel Pipe Co.,Ltd;
Tianjin Youfa Societas Technologiae Fistularum, Ltd.;
Tianjin Youfa Ruida Societas Aedificiorum Vehiculorum, Ltd.;
Tianjin Youfa Societas Fistularum Chalybis Inoxidabilis, Ltd.;
Tianjin Youfa Hongtuo Societas Fabricationis Tuborum Ferreorum, Ltd.
Tangshan Productionis Basis -- Tangshan Zhengyuan Pipeline Industry Co., Ltd.;
Tangshan Youfa Societas Fabricationis Tuborum Ferreorum, Ltd.;
Tangshan Youfa Nova Societas Instrumentorum Constructionis, Ltd.
Basis Productionis Handan — Societas Tuborum Ferreorum Handan Youfa, Ltd.;
Shaanxi Productio Base-Shaanxi Youfa Steel Pipe Co., Ltd
Jiangsu Productio Base - Jiangsu Youfa Ferro Pipe Co., Ltd

Capacitas Productionis:
9000 operarii.
89 lineae productionis tuborum ferreorum ERW
Sexaginta lineae productionis tuborum ferreorum galvanizatorum calido immersorum
43 lineae productionis tuborum ferreorum quadratorum et rectangularium
9 lineae productionis tuborum ferreorum SSAW
Viginti septem lineae productionis tuborum ferreorum complexorum chalybeum-plasticum
17 lineae productionis tuborum ferreorum quadratorum et rectangularium galvanizatorum per immersionem calidam
Tres laboratorium nationale probatum cum certificatis CNAS
Centrum technologiae negotialis a gubernio Tianjinensi probatum 1
1 officina pro scaffoldingis
1 officina tuborum chalybis inoxidabilis
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