Original
By certification 
The rolling of steel is mainly hot rolling, cold rolling is usually only used to produce small section steel and sheet, etc. .
The termination temperature of hot rolling is generally 800 ~ 900 °C, after which it is cooled in air, thus the hot rolling state is equivalent to normalizing.
Most steel is rolled by hot rolling. Hot-rolled steel, due to the high temperature, the surface of a layer of iron oxide scale, which has a certain degree of corrosion resistance, open storage.But this oxide scale also makes the surface of hot-rolled steel rough, and the size fluctuates greatly, so the steel with smooth surface, accurate size and good mechanical properties should be produced by cold rolling with hot-rolled semi-finished products or finished products.
Product parameters
| Product name | Material | Standard | Size(mm) | Application |
| Low temperature tube | 16MnDG 10MnDG 09DG 09Mn2VDG 06Ni3MoDG ASTMA333 |
GB/T18984-2003 ASTM A333 |
OD:8-1240 ID: 1-200 |
Apply to 45℃~195℃ low temperature pressure vessel and low temperature heat exchanger pipe |
| High-pressureboiler tube | 20G ASTMA106B ASTMA210A ST45.8-III |
GB5310-1995 ASTM SA106 ASTM SA210 DIN17175-79 |
OD:8-1240 ID:1-200 |
Suitable for manufacturing high pressure boiler tube, header, steam pipe, etc |
| Petroleum cracking tube |
10 20 |
GB9948-2006 | OD: 8-630 ID:1-60 |
Used in oil refinery furnace tube, heat exchanger tube |
| Low medium pressure boiler tube | 10# 20# 16Mn |
GB3087-2008 | OD:8-1240 ID:1-200 |
Suitable for manufacturing various structure of low and medium pressure boiler and locomotive boiler |
| General structure of the tube |
10#20#45# 27SiMn ASTM A53A,B 16Mn |
GB/T8162-2008 GB/T17396-1998 ASTM A53 |
OD8-1240 ID.1-200 |
Apply to the general structure, engineering support, mechanical processing, etc |
| Oil casing | J55.K55.N80 .L80.C90.C95.P110 |
API 5CT ISO11960 |
OD:60-508 ID:4.24-16.13 |
Used for extraction of oil or gas in oil Wells casing, used in oil and gas well sidewall |
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