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Welded Mechanical Carbon Steel Tube

Welded Mechanical Carbon Steel Tube Tolerances, As Welded Round Hot Rolled Electric Weld (HREW), Diameter Tolerances, Wall Thickness, Outside Diameter Tolerance, Inches, Wall Tolerances

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Welded Mechanical Carbon Steel Tube Tolerances

As Welded Round Hot Rolled Electric Weld (HREW)

Diameter Tolerances

Outside Diameter Size Range Inches Wall Thickness Outside Diameter Tolerance, Inches
BWG Inches Plus Minus
3/4 to 11/8 incl. l6 to 10 .065 to .134 .0035 .0035
Over 1 1/8 to 2, incl. 16 to 7 .065 to .180 .005 .005
Over 1 1/8 to 2, incl. 6 to 3 .203 to .259 .005 .005
Over 2 to 2 1/2, incl. 16 to 3 .065 to .259 .006 .006
Over 2 1/2 to 3 , incl. 16 to 3 .065 to .259 .008 .008
Over 2 1/2 to 3 , incl. 2 to .320 .284 to .320 .010 .010
Over 3 to 31/2 incl. 16 to 3 .065 to .259 .009 .009
Over 3 to 31/2 incl. 2 to .360 .284 to .360 .012 .012
Over 31/2 to 3 incl. 16 to 3 .065 to .259 .010 .010
Over 31/2 to 4 incl. 2 to .500 .284 to .500 .015 .015
Over 4 to 5, incl. 16 to 3 .065 to .259 .020 .020
Over 4 to 5, incl. 2 to .500 .284 to .500 .020 .020
Over 5 to 6, incl. 16 to 3 .065 to .259 .020 .020
Over 5 to 6, incl. 2 to .500 .284 to .500 .020 .020
Over 6 to 8, incl. 11 to 3 .l20 to .259 .025 .025
Over 6 to 8, incl. 2 to .500 .025 .025 .025
NOTE 1 ó Measurements for diameter are to be taken at least 2 inches from the ends of the tubes.
NOTE 2ó OVALITY shall be within the above tolerances except when the wall thickness is less than 3% of the outside diameter. In such cases the ovality may be 50 percent greater than the outside tolerances but the mean outside diameter shall be within the specified tolerance.

Wall Tolerances

Wall Thickness Outside Diameter, Inches
Inches BWG 3/4 to 1, incl. Over 1 to 115/16, incl. Over 115/16 to 33/4, incl. Over 33/4 to 41/2, incl. Over 41/2 to 8, incl.
Wall Thickness Tolerances, Inches
Plus Minus Plus Minus Plus Minus Plus Minus Plus Minus
.065 16 .005 .009 .004 .010 .003 .011 .002 .012 .002 .012
.072 15 .005 .009 .004 .010 .003 .011 .002 .012 .002 .012
.083 14 .006 .010 .005 .011 .004 .012 .003 .013 .003 .013
.095 13 .006 .010 .005 .011 .004 .012 .003 .013 .003 .013
.109 12 .006 .010 .005 .011 .004 .012 .003 .013 .003 .013
.120 11 .006 .010 .005 .011 .004 .012 .003 .013 .003 .013
.134 10 .006 .010 .005 .011 .004 .012 .003 .013 .003 .013
.148 9 - - .006 .012 .005 .013 .004 .014 .004 .014
.165 8 - - .006 .012 .005 .013 .004 .014 .004 .014
.180 7 - - .006 .012 .005 .013 .004 .014 .004 .014
.203 6 - - - - .007 .015 .006 .016 .005 .017
.220 5 - - - - .007 .015 .006 .016 .005 .017
.238 4 - - - - .012 .020 .011 .021 .010 .022
.259 3 - - - - .013 .021 .012 .022 .011 .023
.284 2 - - - - .014 .022 .013 .023 .012 .024
.300 1 - - - - .015 .023 .014 .024 .013 .025
.320 - - - - - .016 .024 .015 .025 .014 .025
.344 - - - - - .017 .025 .016 .026 .015 .027
.360 - - - - - .017 .025 .016 .026 .015 .027
.375 - - - - - - - .016 .026 .015 .027
.406 - - - - - - - .017 .027 .016 .028
.438 - - - - - - - .017 .027 .016 .028
.469 - - - - - - - - - .016 .028
.500 - - - - - - - - - .016 .028

Inside Weld Flash

HREW tubing is usually produce to OD x Wall dimensions only and in three categories determined by height of inside diameter welding flash:
Flash-In-Tubing ó ID flash does not exceed wall thickness or 3/32" whichever is less.
Flash Controlled .010" ó ID flash is .010" maximum height.
Flash Controlled .005" ó ID flash is .005" maximum height.

As Welded Round Cold Rolled Electric Weld (CREW)

Diameter Tolerances

Outside Diameter Size Range Inches Wall Thickness Outside Diameter Tolerance, Inches
BWG Inches Plus Minus
1/4 to 3/8 incl. 22 to 14 .028 to .083 .0025 .0025
Over 3/8 to 5/8, incl. 22 to 16 .028 to .065 .003 .003
Over 3/8 to 5/8, incl. 14 to 12 .083 to .109 .003 .003
Over 5/8 to 1 1/8, incl. 22 to 14 .028 to .083 .0035 .0035
Over 5/8 to 1 1/8, incl. 13 to 11 .095 to .120 .0035 .0035
Over 1 1/8 to 2, incl. 22 to 14 .028 to .083 .005 .005
Over 1 1/8 to 2, incl. 13 to 9 .095 to .148 .005 .005
Over 2 to 21/2, incl. 20 to 18 .035 to .049 .008 .008
Over 2 to 21/2, incl. l3 to 9 .095 to .148 .006 .006
Over 21/2 to 3 incl. 16 to 9 .065 to .148 .008 .008
Over 3 to 31/2, incl. 20 to 9 .035 to .148 .009 .009
Over 31/2 to 4, incl. 20 to 8 .035 to .165 .010 .010
Over 4 to 5, incl. 16 to 14 .065 to .083 .020 .020
Over 4 to 5, incl. l3 to 8 .095 to .165 .015 .015
Over 5 to 6, incl. l6 to 8 .065 to .165 .020 .020
NOTE 1 ó Measurements for diameter are to be taken at least 2 inches from the ends of the tubes.
NOTE 2ó OVALITY shall be within the above tolerances except when the wall thickness is less than 3% of the outside diameter. In such cases the ovality may be 50 percent greater than the outside tolerances but the mean outside diameter shall be within the specified tolerance.

Wall Tolerances

Wall Thickness Outside Diameter, Inches
Inches BWG 3/8 to 7/8, incl. Over 7/8 to 11/8, incl. Over 17/8 to 33/4, incl. Over 33/4 to 5, incl. Over 5 to 6, incl.
Wall Thickness Tolerances, Inches
Plus Minus Plus Minus Plus Minus Plus Minus Plus Minus
.028 22 .001 .005 .001 .005 - - - - - -
.035 20 .002 .005 .001 .005 .001 .005 - - - -
.049 18 .003 .006 .002 .006 .002 .006 - - - -
.065 16 .005 .007 .004 .007 .004 .007 .004 .007 .004 .007
.083 14 .006 .007 .005 .007 .004 .007 .004 .007 .004 .008
.095 13 .006 .007 .005 .007 .004 .007 .004 .007 .004 .008
.109 12 - - .006 .008 .005 .008 .005 .008 .005 .009
.120 11 - - .007 .008 .006 .008 .005 .008 .005 .009
.134 10 - - .007 .008 .006 .008 .005 .008 .005 .009

Inside Weld Flash

CREW tubing is usually produce to OD x Wall dimensions only and in three categories determined by height of inside diameter welding flash:
Flash-In-Tubing - ID flash does not exceed wall thickness or 3/32" whichever is less.
Flash Controlled .010" - ID flash is .010" maximum height.
Flash Controlled .005" - ID flash is .005" maximum height.

The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other purposes.

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