DIAMETER TOLERANCES (INCHES) HOT ROLLED ROUND

NOTE: Measurements for diameter are to be taken at least 2 inchesa from the ends of the tubes.

Outside Diameter
Range, In.a
Wall Thickness
Flash-in
Tubingb,c
Flash
Controlled
to 0.010 In.
max
Tubingc,e
Flash Controlled
to 0.005 In. max
Tubingd,e
Bwgf
In.a
Outside
Diameter
Plus and
Minus
Outside
Diameter
Plus and
Minus
Outside
Diameter
Plus and
Minus
Inside
Diameter
Plus and
Minus
Tolerances, In.a,g
3/4 to 1-1/8, incl
16 to 10
0.065 to 0.134
0.0035
0.0035
0.0035
0.020
Over 1-1/8 to 2, incl
16 to 14
0.065 to 0.083
0.005
0.005
0.005
0.021
Over 1-1/8 to 2, incl
13 to 7
0.095 to 0.180
0.005
0.005
0.005
0.025
Over 1-1/8 to 2, incl
6 to 5
0.203 to 0.220
0.005
0.005
0.005
0.029
Over 1-1/8 to 2, incl
4 to 3
0.238 to 0.259
0.005
0.005
0.005
0.039
Over 2 to 2-1/2, incl
16 to 14
0.065 to 0.083
0.006
0.006
0.006
0.022
Over 2 to 2-1/2, incl
13 to 5
0.095 to 0.220
0.006
0.006
0.006
0.024
Over 2 to 2-1/2, incl
4 to 3
0.238 to 0.259
0.006
0.006
0.006
0.040
Over 2-1/2 to 3, incl
16 to 14
0.065 to 0.083
0.008
0.008
0.008
0.024
Over 2-1/2 to 3, incl
13 to 5
0.095 to 0.220
0.008
0.008
0.008
0.026
Over 2-1/2 to 3, incl
4 to 3
0.238 to 0.259
0.008
0.008
0.008
0.040
Over 2-1/2 to 3, incl
2 to 0.320
0.284 to 0.320
0.010
0.010
0.010
0.048
Over 3 to 3-1/2, incl
16 to 14
0.065 to 0.083
0.009
0.009
0.009
0.025
Over 3 to 3-1/2, incl
13 to 5
0.095 to 0.220
0.009
0.009
0.009
0.027
Over 3 to 3-1/2, incl
4 to 3
0.238 to 0.259
0.009
0.009
0.009
0.043

DIAMETER TOLERANCES (INCHES) HOT ROLLED ROUND

NOTE: Measurements for diameter are to be taken at least 2 inchesa from the ends of the tubes.

Outside Diameter
Range, In.a
Wall Thickness
Flash-in
Tubingb,c
Flash
Controlled
to 0.010 In.
max
Tubingc,e
Flash Controlled
to 0.005 In. max
Tubingd,e
Bwgf
In.a
Outside
Diameter
Plus and
Minus
Outside
Diameter
Plus and
Minus
Outside
Diameter
Plus and
Minus
Inside
Diameter
Plus and
Minus
Tolerances, In.a,g
Over 3-1/2 to 4, incl
16 to 14
0.065 to 0.083
0.010
0.010
0.010
0.026
Over 3-1/2 to 4, incl
13 to 5
0.095 to 0.220
0.010
0.010
0.010
0.028
Over 3-1/2 to 4, incl
4 to 3
0.238 to 0.259
0.010
0.010
0.010
0.044
Over 3-1/2 to 4, incl
2 to 0.500
0.284 to 0.500
0.015
0.015
0.015
0.053
Over 4 to 5, incl
16 to 14
0.065 to 0.083
0.020
0.020
0.020
0.036
Over 4 to 5, incl
13 to 5
0.095 to 0.220
0.020
0.020
0.020
0.045
Over 4 to 5, incl
4 to 3
0.238 to 0.259
0.020
0.020
0.020
0.054
Over 4 to 5, incl
2 to 0.500
0.284 to 0.500
0.020
0.020
0.020
0.058
Over 5 to 6, incl
16 to 10
0.065 to 0.134
0.020
0.020
0.020
0.036
Over 5 to 6, incl
9 to 5
0.145 to 0.220
0.020
0.020
0.020
0.040
Over 5 to 6, incl
4 to 3
0.238 to 0.259
0.020
0.020
0.020
0.054
Over 5 to 6, incl
2 to 0.500
0.284 to 0.500
0.020
0.020
0.020
0.058
Over 6 to 8, incl.
11 to 10
0.120 to 0.134
0.025
0.025
0.025
0.043
Over 6 to 8, incl.
9 to 5
0.148 to 0.220
0.025
0.025
0.025
0.045
Over 6 to 8, incl.
4 to 3
0.238 to 0.259
0.025
0.025
0.025
0.059
Over 6 to 8, incl.
2 to 0.500
0.284 to 0.500
0.025
0.025
0.025
0.063
a1 inch = 25.4 mm.
bFlash-In tubing is produced only to outside diameter tolerances and wall thickness tolerances and the inside diameter welding flash does not exceed the wall thickness or 3/32 inch, whichever is less.
cFlash controlled to 0.010 inch max tubing consists of tubing over 1-1/8 inch outside diameter which is commonly produced only to outside diameter tolerances and wall thickness tolerances, in which the height of the remaining inside welding flash is controlled not to exceed 0.010 inch
dFlash controlled to 0.005 inch max tubing is produced to outside diameters and wall thickness tolerance, inside diameter and wall thickness tolerances, or outside diameter and inside diameter tolerances, in which the height of the remaining flash is controlled not to exceed 0.005 inch. Any remaining flash is considered to be part of the applicable inside diameter tolerances.
eNo-flash tubing is further processed for closer tolerances with mandrel-tubing produced to outside diameter and wall, inside diameter and wall, or outside diameter and inside diameter to tolerances with no dimensional indication of inside diameter flash. This condition is available in Types 5 and 6.
fBirmingham Wire Gauge.
gThe ovality shall be within the above tolerances except when the wall thickness is less than 3 percent of the outside diameter, in such cases see 10.6.1.

WALL THICKNESS TOLERANCES (INCHES) HOT ROLLED ROUND 

Wall
Thickness
Outside Diameter, In.a
In.a
Bwgb
3/4 to
1
incl.
Over 1
to 1-15/16,
inc.
Over 1-15/16
to 3-3/4,
inc.
Over 3-3/4
to 4-1/2,
incl.
Over 4-1/2
to 6,
incl.
Over 6
to 8,
incl.
Wall Thickness Tolerances, in.,a Plus and Minus
Plus
Minus
Plus
Minus
Plus
Minus
Plus
Minus
Plus
Minus
Plus
Minus
0.065
16
0.005
0.009
0.004
0.010
0.003
0.011
0.002
0.012
0.002
0.012
0.072
15
0.005
0.009
0.004
0.010
0.003
0.011
0.002
0.012
0.002
0.012
0.083
14
0.006
0.010
0.005
0.011
0.004
0.012
0.003
0.013
0.003
0.013
0.095
13
0.006
0.010
0.005
0.011
0.004
0.012
0.003
0.013
0.003
0.013
0.109
12
0.006
0.010
0.005
0.011
0.004
0.012
0.003
0.013
0.003
0.013
0.003
0.013
0.120
11
0.006
0.010
0.005
0.011
0.004
0.012
0.003
0.013
0.003
0.013
0.003
0.013
0.134
10
0.006
0.010
0.005
0.011
0.004
0.012
0.003
0.013
0.003
0.013
0.003
0.013
0.148
9
0.006
0.012
0.005
0.013
0.004
0.014
0.004
0.014
0.004
0.014
0.165
8
0.006
0.012
0.005
0.013
0.004
0.014
0.004
0.014
0.004
0.014
0.180
7
0.006
0.012
0.005
0.013
0.004
0.014
0.004
0.014
0.004
0.014
0.203
6
0.007
0.015
0.006
0.016
0.005
0.017
0.005
0.017
0.220
5
0.007
0.015
0.006
0.016
0.005
0.017
0.005
0.017
0.238
4
0.012
0.020
0.011
0.021
0.010
0.022
0.010
0.022
0.259
3
0.013
0.021
0.012
0.022
0.011
0.023
0.011
0.023
0.284
2
0.014
0.022
0.013
0.023
0.012
0.024
0.012
0.024
0.300
1
0.015
0.023
0.014
0.024
0.013
0.025
0.013
0.025
0.320
0.016
0.024
0.015
0.025
0.014
0.026
0.014
0.026
0.344
0.017
0.025
0.016
0.026
0.015
0.027
0.015
0.027
0.360
0.017
0.025
0.016
0.026
0.015
0.027
0.015
0.027
0.375
0.016
0.026
0.015
0.027
0.015
0.027
0.406
0.017
0.027
0.016
0.028
0.016
0.028
0.438
0.017
0.027
0.016
0.028
0.016
0.028
0.469
0.016
0.028
0.016
0.028
0.500
0.016
0.028
0.016
0.028

a 1 inch = 25.4 mm.
b Birmingham Wire Gauge.