ASTM A513 T2 Cold Rolled Electric Weld

ELECTRIC RESISTANCE WELDED TUBING

ASTM A513

Electric resistance welded tubes are produced from a cold rolled or hot rolled strip which is formed by rolls at room temperature into a tubular shape. Welding takes place as an electric current heats the two edges of the strip as they are pressed together. Only a narrow band of metal is heated while the rest of the tube remains at room temperature. The weld flash is always trimmed off the outside of the tube. The flash can also be trimmed or rolled down on the inside by special tooling.

DIAMETER TOLERANCES (INCHES) COLD ROLLED ROUND

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

Outside Diameter Range, In.^a	Wall Thickness		Flash-in Tubing^b	Flash Controlled to 0.010 In. max Tubing^c	Flash Controlled^d to 0.005 In. max Tubing
	Bwg^e	In.^a	Outside Diameter Plus and Minus	Outside Diameter Plus and Minus	Outside Diameter Plus and Minus	Inside Diameter Plus and Minus
	Bwg^e	In.^a	Tolerances, In.^f
3/8 to 5/8, incl	22 to 16	0.028 to 0.065	0.0030	—	—	—
Over 5/8 to 1-1/8, incl	22 to 20	0.028 to 0.035	0.0035	0.0035	0.0035	0.013
Over 5/8 to 1-1/8, incl	18	0.049	0.0035	0.0035	0.0035	0.015
Over 5/8 to 1-1/8, incl	16 to 14	0.065 to 0.083	0.0035	0.0035	0.0035	0.019
Over 3/4 to 1-1/8, incl	13	0.095	0.0035	0.0035	0.0035	0.019
Over 7/8 to 1-1/8, incl	12 to 11	0.109 to 0.120	0.0035	0.0035	0.0035	0.021
Over 1-1/8 to 2, incl	22 to 18	0.028 to 0.049	0.005	0.005	0.005	0.015
Over 1-1/8 to 2, incl	16 to 13	0.065 to 0.095	0.005	0.005	0.005	0.019
Over 1-1/8 to 2, incl	12 to 10	0.109 to 0.134	0.005	0.005	0.005	0.022

^a	1 inch = 25.4 mm.
^{^b}	Flash-In tubing is produced to outside diameter tolerances and wall thickness tolerances only, and the height of the inside welding flash does not exceed the wall thickness or 3/32 inch, whichever is less.
^{^c}	Flash controlled to 0.010 inch max tubing consists of tubing over 5/8 inch outside diameter which is commonly produced to outside diameter tolerances and wall thickness tolerances only, in which the height of the remaining inside welding flash is controlled not to exceed 0.010 inch
^{^d}	Flash controlled to 0.005 inch max tubing is produced to outside diameter tolerances and wall thickness tolerances, inside diameter tolerances and wall thickness tolerances, or outside diameter tolerances and inside diameter tolerances, in which the height of the remaining inside welding flash is controlled not to exceed 0.005 inch. Any remaining flash is considered to be part of the applicable inside diameter tolerances.
^{^e}	Birmingham Wire Gauge.
^f	The ovality shall be within the above tolerances except when the wall thickness is less than 3 percent of the outside diameter.

Outside Diameter Range, In.^a	Wall Thickness		Flash-in Tubing^b	Flash Controlled to 0.010 In. max Tubing^c	Flash Controlled^d to 0.005 In. max Tubing
	Bwg^e	In.^a	Outside Diameter Plus and Minus	Outside Diameter Plus and Minus	Outside Diameter Plus and Minus	Inside Diameter Plus and Minus
	Bwg^e	In.^a	Tolerances, In.^f
Over 2 to 2-1/2, incl	20 to 18	0.035 to 0.049	0.006	0.006	0.006	0.016
Over 2 to 2-1/2, incl	16 to 13	0.065 to 0.095	0.006	0.006	0.006	0.020
Over 2 to 2-1/2, incl	12 to 10	0.109 to 0.134	0.006	0.006	0.006	0.023
Over 2-1/2 to 3, incl	20 to 18	0.035 to 0.049	0.008	0.008	0.008	0.018
Over 2-1/2 to 3, incl	16 to 13	0.065 to 0.095	0.008	0.008	0.008	0.022
Over 2-1/2 to 3, incl	12 to 10	0.109 to 0.134	0.008	0.008	0.008	0.025
Over 3 to 3-1/2, incl	20 to 18	0.035 to 0.049	0.009	0.009	0.009	0.019
Over 3 to 3-1/2, incl	16 to 13	0.065 to 0.095	0.009	0.009	0.009	0.023
Over 3 to 3-1/2, incl	12 to 10	0.109 to 0.134	0.009	0.009	0.009	0.026
Over 3-1/2 to 4, incl	20 to 18	0.035 to 0.049	0.010	0.010	0.010	0.020
Over 3-1/2 to 4, incl	16 to 13	0.065 to 0.095	0.010	0.010	0.010	0.024
Over 3-1/2 to 4, incl	12 to 10	0.109 to 0.134	0.010	0.010	0.010	0.027
Over 4 to 6, incl	16 to 13	0.065 to 0.095	0.020	0.020	0.020	0.034
Over 4 to 6, incl	12 to 10	0.109 to 0.134	0.020	0.020	0.020	0.037
Over 6 to 8, incl	14 to 13	0.083 to 0.095	0.025	0.025	0.025	0.039
Over 6 to 8, incl	12 to 10	0.109 to 0.134	0.025	0.025	0.025	0.042

^a	1 inch = 25.4 mm.
^{^b}	Flash-In tubing is produced to outside diameter tolerances and wall thickness tolerances only, and the height of the inside welding flash does not exceed the wall thickness or 3/32 inch, whichever is less.
^{^c}	Flash controlled to 0.010 inch max tubing consists of tubing over 5/8 inch outside diameter which is commonly produced to outside diameter tolerances and wall thickness tolerances only, in which the height of the remaining inside welding flash is controlled not to exceed 0.010 inch
^d	Flash controlled to 0.005 inch max tubing is produced to outside diameter tolerances and wall thickness tolerances, inside diameter tolerances and wall thickness tolerances, or outside diameter tolerances and inside diameter tolerances, in which the height of the remaining inside welding flash is controlled not to exceed 0.005 inch. Any remaining flash is considered to be part of the applicable inside diameter tolerances.
^e	Birmingham Wire Gauge.
^f	The ovality shall be within the above tolerances except when the wall thickness is less than 3 percent of the outside diameter.

WALL THICKNESS TOLERANCES (INCHES) COLD ROLLED ROUND

Wall Thickness		Outside Diameter, In.
In.^a	Bwg^b	3/8 to 7/8 incl.		Over 7/8 to 1-7/8, inc.		Over 1-7/8 to 3-3/4, inc.		Over 3-3/4 to 5, incl.		Over 5 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
0.028	22	0.001	0.005	0.001	0.005	—	—	—	—	—	—	—	—
0.035	20	0.002	0.005	0.001	0.005	0.001	0.005	—	—	—	—	—	—
0.049	18	0.003	0.006	0.002	0.006	0.002	0.006	—	—	—	—	—	—
0.065	16	0.005	0.007	0.004	0.007	0.004	0.007	0.004	0.007	0.004	0.007	—	—
0.083	14	0.006	0.007	0.005	0.007	0.004	0.007	0.004	0.007	0.004	0.008	0.004	0.008
0.095	13	0.006	0.007	0.005	0.007	0.004	0.007	0.004	0.007	0.004	0.008	0.004	0.008
0.109	12	—	—	0.006	0.008	0.005	0.008	0.005	0.008	0.005	0.009	0.005	0.009
0.120	11	—	—	0.007	0.008	0.006	0.008	0.005	0.008	0.005	0.009	0.005	0.009
0.134	10	—	—	0.007	0.008	0.006	0.008	0.005	0.008	0.005	0.009	0.005	0.009

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