المعيار الوطني: Q195، Q215، Q235، Q345، L175، L210، L245، L320، L360-L555
RW Tube Outside Diameter
|
ERW Steel Tubes Thickness
|
||||||
|
|
|
SCH10
|
SCH40
|
Class A
light
|
Class B
medium
|
Class C
heavy
|
DN15
|
1/2"
|
21.3mm
|
2.11mm
|
2.77mm
|
2mm
|
2.6mm
|
|
DN20
|
3/4"
|
26.7mm
|
2.11mm
|
2.87mm
|
2.3mm
|
2.6mm
|
3.2mm
|
DN25
|
1"
|
33.4mm
|
2.77mm
|
3.38mm
|
2.6mm
|
3.2mm
|
4mm
|
DN32
|
1-1/4"
|
42.2mm
|
2.77mm
|
3.56mm
|
2.6mm
|
3.2mm
|
4mm
|
DN40
|
1-1/2"
|
48.3mm
|
2.77mm
|
3.68mm
|
2.9mm
|
3.2mm
|
4mm
|
DN50
|
2"
|
60.3mm
|
2.77mm
|
3.91mm
|
2.9mm
|
3.6mm
|
4.5mm
|
DN65
|
2-1/2"
|
73mm
76mm
|
3.05mm
|
5.16mm
|
|
|
|
DN80
|
3"
|
88.9mm
|
3.05mm
|
5.49mm
|
3.2mm
|
4mm
|
5mm
|
DN90
|
3-1/2"
|
101.6mm
|
3.05mm
|
5.74mm
|
|
|
|
DN100
|
4"
|
114.3mm
|
3.05mm
|
6.02mm
|
3.6mm
|
4.5mm
|
5.4mm
|
DN125
|
5"
|
141.3mm
|
3.4mm
|
6.55mm
|
|
5mm
|
5.4mm
|
DN150
|
6"
|
168.3mm
165mm
|
3.4mm
|
7.11mm
|
|
|
|
DN200
|
8"
|
219.1mm
|
3.76mm
|
8.18mm
|
|
|
|
DN250
|
10"
|
273.1mm
|
4.19mm
|
9.27mm
|
|
|
4. Anti-static pipes for wind power stations.
Tensile |
Electric-resistance-welded
|
|
Grade A |
Grade B |
|
Tensile Strength min. psi |
48,000 |
45,000 |
Yield Strength min. psi |
30,000 |
25,000 |
Type |
Carbon
max. % |
Manganese max. % |
Phosphorous max. % |
Sulfur max. % |
Copper max. % |
Nickel max. % |
Chromium max. % |
Molybdenum max. % |
||||||||
Grade A |
Grade B |
Grade A |
Grade B |
Grade A |
Grade B |
Grade A |
Grade B |
Grade A |
Grade B |
Grade A |
Grade B |
Grade A |
Grade B |
Grade A |
Grade B |
|
Type E (electric-resistance welded) |
0.25 | 0.30 | 0.95 | 1.2 |
0.05 |
0.05 | 0.045 | 0.045 |
0.40 |
0.40 |
0.40 |
0.40 |
0.15 |
0.15 |
0.08 |
0.08 |