Specifications: diameter: 320 to 127 mm thickness: 0.4 to 12.7 mm Length: 6 m above, and, in accordance with customer demand, supply and other specifications of steel pipe
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- ERW pipe
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How to calculate 20 # 45 # precision seamless steel pipe siz
How to calculate 20 # 45 # precision seamless steel pipe size tolerances
20 # 45 # precision seamless steel pipe
20 # 45 # precision seamless steel mechanical properties
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Steel grades
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Mechanical Properties
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Cold drawn (rolled) pipe
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Metal cutting tube
|
|
# 20
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Tensile strength σbN/mm2
Elongation δ5%
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≥ 510
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≥ 390
|
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≥ 5
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≥ 20
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||
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45 #
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≥ 647
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≥ 590
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|
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≥ 4
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≥ 4
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Processed form
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Bore
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Length
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Straightness
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Dimensional accuracy
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Inner hole roughness
|
|
Cold-rolled
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30-100
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≤ 12M
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0.3-1.0
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H8-H10
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0.4-1.6
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Cold Drawn
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30-250
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≤ 12M
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H8-H10
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0.8-1.6
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|
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Honing
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40-500
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≤ 12M
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1000
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H8-H9
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0.4-0.8
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Rolling
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40-400
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≤ 7M
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H8
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0.4
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Dimensional tolerances
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Dimensional tolerances (thickness deviation of ± 5%)
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|||
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Diameter size
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H8
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H9
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H10
|
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30
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+0.033
0
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+0.052
0
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+0.084
0
|
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> 30-50
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+0.039
0
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+0.062
0
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+0.100
0
|
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> 50-80
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+0.046
0
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+0.074
0
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+0.120
0
|
|
> 80-120
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+ 0.054
0
|
0.087
0
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+0.140
0
|
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> 120-180
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+0.063
0
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+0.100
0
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+0.160
0
|
|
> 180-250
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+0.072
0
|
+0.115
0
|
+0.185
0
|
|
> 250-315
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+0.081
0
|
+0.130
0
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+0.210
0
|
|
> 315-400
|
+0.089
0
|
+0.140
0
|
+0.230
0
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The high-pressure boiler tubes dimensional tolerances
The steel pipe types diameter (D) wall thickness (S)
Pipe wall thickness cold drawn pipe steel pipe diameter (mm) allow deviation (mm) (mm) allow deviation (mm)
> 30 ~ 50 ± 0.3> 3 ~ 20 ± 10%
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- Carbon steel pipe Standard
- ASTM A106 pipe
- ASTM A53 pipe
- ASTM A192 pipe
- ASTM A252 pipe
- ASTM A179 pipe
- DIN 1629 pipe
- DIN 17175 pipe
- Alloy pipe Standard
- ASTM A335 pipe
- ASTM A210 pipe
- ASTM A213 pipe
- ASTM A234 pipe
- ASTM A519 pipe
- Stainless pipe metrial
- 304, 304L, 304SS pipe
- 310, 310S pipe
- 316, 316L pipe
- Pipe Fitting Metrial
- Carbon steel: A234 WPB pipe
- Stainless steel: 304,316 pipe
- Alloy steel: A234 WP5 WP9 WP11 WP22 pipe