Q
What's the diameter tolerance and thickness tolerance of ASTM A554 standard
A

                                         Standard for the Round tube

圆管尺寸公差 SIZE TOLERANCE OF ROUND TUBES
标准
Standard
外径mm)
Outside Diameter
厚度mm)
Thickness
外径公差mm)
Outer Diameter 
Tolerance
厚度公差mm)
Thickness 
Tolerance

长度公差mm)
Length Tolerance
ASTM
A554
12.70.51-1.24+/-0.10+/-10%+4.8-0
>12.7-25.40.51-1.65+/-0.13
>1.65-3.40+/-0.25
>25.4-38.10.64-1.65+/-0.20
>1.65-3.40+/-0.25
>38.1-50.80.64-1.24+/-0.25
>1.24-2.11+/-0.28
>2.11-3.78+/-0.30
>50.8-63.50.81-1.65+/-0.30
>1.65-2.77+/-0.33
>63.5-88.9>2.77-4.19+/-0.36
0.81-1.19+/-0.36
>88.9-127.00.89-4.19+/-0.51
>4.19+/-0.64
>127.0-190.51.24-6.35+/-0.64
>6.35+/-0.76

                                        

                      Standard for square and rectangular tube

方管,矩形管尺寸公差 SIZE TOLERANCE OF SQUARE AND RECTANGULAR TUBE
最大角度
Max Radii of Corners
外径公差mm)
Outside Tolerance
扭角Twist tolerance
厚度mm)
wall thickness
最大角度mm)
Radii of Corners, Max
Largest Normal 
Outside Diamension
Across Flats
Convexity or Comcavity
外径mm) 
Outside Diameter
公差(mm)
Tolerance
>0.51-1.242.431.80+/-0.3812.70
>12.70-38.10
>38.1-63.5
>63.5-101.6
>101.60-152.40
>152.40
1.53
2.30
2.84
3.82
7.54
11.37
>1.24-1.653.2
>1.65-2.113.6>31.80-63.5+/-0.51
>2.11-2.424.8
>2.42-2.775.2>63.5-139.70+/-0.76
>2.77-3.405.6
>3.40-3.966.4>139.70-203.20+/-1.52
>3.96-5.089.5
>5.08-6.3512.7



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