Hot Sale Black Painting ERW Round Steel Pipes and Tubes with Plastic Cap

Model NO.: 1/2"-8"
Standard: BS1387 ASTM A3
Color: Black
Length: 1-12m
End Protecter: Plastic Cap
Thread: NPT BS21
Delivery Time: 30 Days After Deposit
Trademark: bridge steel
Transport Package: Standard Export Bundle Package
Specification: 3/8"-8"
Origin: Tianjin China
HS Code: 73063090
Model NO.: 1/2"-8"
Standard: BS1387 ASTM A3
Color: Black
Length: 1-12m
End Protecter: Plastic Cap
Thread: NPT BS21
Delivery Time: 30 Days After Deposit
Trademark: bridge steel
Transport Package: Standard Export Bundle Package
Specification: 3/8"-8"
Origin: Tianjin China
HS Code: 73063090
Hot Sale Black Painting ERW Round Steel Pipes And Tubes With Plastic Cap
Description:

we are top supplier in Tianjin with over ten years experience in manufacturing and exporting steel pipe. Our main market is South America, Southeast Asia, Middle east, South Korea, India,etc. Best quality, reasonable price and professional service will be your best choice.
Black pipe, welded steel pipe under ASTM A53
Nominal Size    O.D. (mm)  W.T (mm)         Weight Grade  Sch  Grade A Test Pressure    (Mpa)  Weight (black pipe) plain end  (kg/m)
 1/2 21.3 2.77 STD 40 4.83 1.27
 3/4 26.7 2.87 STD 40 4.83 1.69
1     33.4 3.38 STD 40 4.83 2.5
1 1/4 42.2 3.56 STD 40 8.27 3.39
1 1/2 48.3 3.68 STD 40 8.27 4.05
2     60.3 3.91 STD 40 15.86 5.44
2 1/2 73 5.16 STD 40 17.24 8.63
3     88.9 5.49 STD 40 15.31 11.29
4     114.3 6.02 STD 40 13.1 16.07
5     141.1 6.55 STD 40 11.5 21.73
6     168.3 7.11 STD 40 10.5 28.26
Hot Sale Black Painting ERW Round Steel Pipes and Tubes with Plastic Cap

Hot Sale Black Painting ERW Round Steel Pipes and Tubes with Plastic Cap
Hot Sale Black Painting ERW Round Steel Pipes and Tubes with Plastic Cap
Hot Sale Black Painting ERW Round Steel Pipes and Tubes with Plastic Cap
Hot Sale Black Painting ERW Round Steel Pipes and Tubes with Plastic Cap
Hot Sale Black Painting ERW Round Steel Pipes and Tubes with Plastic Cap








 
Hot Sale Black Painting ERW Round Steel Pipes And Tubes With Plastic Cap
Description:

we are top supplier in Tianjin with over ten years experience in manufacturing and exporting steel pipe. Our main market is South America, Southeast Asia, Middle east, South Korea, India,etc. Best quality, reasonable price and professional service will be your best choice.
Black pipe, welded steel pipe under ASTM A53
Nominal Size    O.D. (mm)  W.T (mm)         Weight Grade  Sch  Grade A Test Pressure    (Mpa)  Weight (black pipe) plain end  (kg/m)
 1/2 21.3 2.77 STD 40 4.83 1.27
 3/4 26.7 2.87 STD 40 4.83 1.69
1     33.4 3.38 STD 40 4.83 2.5
1 1/4 42.2 3.56 STD 40 8.27 3.39
1 1/2 48.3 3.68 STD 40 8.27 4.05
2     60.3 3.91 STD 40 15.86 5.44
2 1/2 73 5.16 STD 40 17.24 8.63
3     88.9 5.49 STD 40 15.31 11.29
4     114.3 6.02 STD 40 13.1 16.07
5     141.1 6.55 STD 40 11.5 21.73
6     168.3 7.11 STD 40 10.5 28.26
Hot Sale Black Painting ERW Round Steel Pipes and Tubes with Plastic Cap

Hot Sale Black Painting ERW Round Steel Pipes and Tubes with Plastic Cap
Hot Sale Black Painting ERW Round Steel Pipes and Tubes with Plastic Cap
Hot Sale Black Painting ERW Round Steel Pipes and Tubes with Plastic Cap
Hot Sale Black Painting ERW Round Steel Pipes and Tubes with Plastic Cap
Hot Sale Black Painting ERW Round Steel Pipes and Tubes with Plastic Cap








 

Silicon Lens

The refractive index of the monocrystalline silicon material is about 3.42, and the reflectivity of the silicon lens after polishing is about 30% in the air environment. Our common silicon lens and silicon window can be coated on the surface (Antireflection Coating), which can reduce the reflectivity to less than 1.5% between 3 to 5 um.

Some silicon elements, especially the silicon protected windows, are exposed to dust, acid, salt and so on in the harsh environment. The conventional multilayer antireflection coating will be damaged and affect the normal work of the equipment. At this time, we need to make DLC coating on the surface of the silicon lens.

Diamond-Like Carbon (DLC) Coated Silicon Windows are engineered for 3 to 5µm, making them ideal for infrared defense applications such as thermal imaging.
Diamond-Like Carbon (DLC) Coated Silicon Windows provide anti-reflection coating on one surface and a specially designed DLC coating on the other surface, making these windows highly durable and ideal for harsh environments.


SI curve

Si material properties


Silicon lens specifications:
Standard precision High-precision
Dimension Tolerance φ5-250mm+0/-0.2 φ3-350mm+0/-0.2
Thickness Tolerance 1-50mm+/-0.1 1-50mm
Centration 3 arc minute 1 arc minute
Surface Quality 60/40 20/10
Power(fringe@633nm) N<λ/2@633nm(in 25mm) N<λ/10@633nm(in 25mm)
Clear Aperture >90% >95%
Chamfer Protected <0.5mmx45deg Protected <0.5mmx45deg

Silicon Lens,Silicon Optical Lens,Infrared Si Lens,Silicon Plano-Convex Lens

China Star Optics Technology Co.,Ltd. , https://www.csoptlens.com