T O L E R A N C E S
TOLERANCES OF ASTM SPECIFICATIONS FOR PIPES AND TUBES Download Specification


Specification
Allowable Outside Diameter
Variations in mm
Allowable Wall
Thickness Variations
Exact Length
Tolerances in mm
Testing
ASTM - 106
Seamless Pipe
For High Temp.


A 335 Seamless
Ferritic Alloy Steel
Pipe for High Temp.
Service.
Diameter
3-40 Incl.
Over 40-100 Incl.
Over 100-200 Incl.
Over 200-450 Incl.
Over 450-650 Incl.
Over 650-850 Incl.
Over
0.4
0.8

1.6

2.4

3.2

4.0
Under
0.8
0.8

0.8

0.8

0.8

0.8
Over% Under%
+12.5 -12.5
+12.5 -12.5

+12.5 -12.5

+12.5 -12.5

+12.5 -12.5

+12.5 -12.5
Over Under
6 0
6 0

6 0

6 0

6 0

6 0
Product Analysis
Tension Test,
Flattening Test,
100% Hydro test
ASTM A - 249
Welded boiler,
Superheater,
Heat
Exchanger and
Condensor Tubes
under 25.4
25.4 - 38.1 incl.
38.1 - 50.8 excl.
50.8 - 75.2 excl.
63.5 - 75.2 excl.
76.2 - 101.6 incl.
0.1016
0.1524
0.2032
0.2540
0.3048
0.3810
0.1016
0.1524
0.2032
0.2540
0.3048
0.3810
+10  -10
+10  -10
+10  -10
+10  -10
+10  -10
+10  -10
Minimum Wall Tubes
+ 18% - )Available
on request
3.175    0
3.175    0
3.175    0
4.76    0
4.76    0
4.76    0
Product Analysis
Tension Test,
Flattening Test,
Flara tst / Flange Test
*Reverse Bend Test
Hardness Test
*Reverse Flattening Test
Refer to ASTM A-450
*wherever Applicable
ASTMA.312
seamiess &
welded pipes
13.7 - 48.3 incl.
48.3 - 114.3 incl.
114.3 - 220 incl.
0.40
0.79
1.59
0.79
0.79
0.79
Minimum Wall Tubes
12.5% under Nominal wall specified
6.4    0
6.4    0
6.4    0
(Normally Random
lengths ordered)
Product Analysis
Tension Test
Flattening Test
100% Hydro Test
ASTMA - 269
Seamless &
Welded Service
Upto 12.7
12.7-38.1 excl.
38.1-88.9 excl.
88.9-139.7 excl.
139.7-203.2 excl.
0.13
0.13
0.25
0.38
0.76
0.13
0.13
0.25
0.38
0.76
+15  -15
+10  -10
+10  -10
+10  -10
+10  -10
3.2  0
3.2  0
4.8  0
4.8  0
4.8  0
Product Analysis
Flare Test Flange Test
(Welded) Hardness Test
Reverse Flattening Test
(welded only)
100% Hydro Test
ASTMA - 213
Seamless Boiler
Superheater and
Heat Exchanger
Tubes
Under 25.4
25.4 - 38.1 incl.
38.1 - 50.8 excl.
50.8 - 63.5 encl.
63.5 - 76.2 excl.
76.2 - 101.6incl.
0.1016
0.1524
0.2032
0.2540
0.3048
0.3810
0.1016
0.1524
0.2032
0.2540
0.3048
0.3810
+20  -0
+20  -0
+22  -0
+22  -0
+22  -0
+22  -0
3.175  0
3.175  0
3.176  0
3.760  0
4.760  0
4.760  0
Product Analysis
Tension Test
Flattening Test
Flare Test
Hardness Test
100% Hydro Test
ASTMA - 268
seamiess &
welded
Under 12.7
12.7 - 38.1 excl.
38.1 - 88.9 excl.
0.13
0.13
0.25
0.13
0.13
0.25
+15  -15
+10  -10
+10  -10
3.2  0
3.2  0
4.8  0
Product Analysis
Tension Test
Trasvers Tension Test
(ERW only)Hardness Test
Reverse Flattening Test
100% Hydro Test
ASTM A- 358
For Welded big
Diameter Pipes
For all Size
+0.5%
+0.5%
No  -0.3
Limit mm
Customer's specification
Product Analysis
Transvers Tension Test
Transvers Guided Bend Test
Hydro Test
Radiographic Examination
(As Specified)
Dye Penetrant (optional)

Tolerances for Mild steel Pipes Download Specification


SPEC OUTSIDE DIAMETER WALL THICKNESS WEIGHT LENGTH
PIPE BODY PIPE END
NOMINAL Ang.Min Minimum Maximum
ft mtr ft mtr ft mtr ft mtr
API 5L < 20 inch size +/- 0.75%
>=20 inch and <=36" size
+0.75%-0.25%
<= 10 3/4 inch-Size + 1.59 mm (1/16")-0.40 mm (1/64")
>10 3/4 and <=42 inch size + 2.38mm (3/32").0.79mm(1/32")
< 20 inch size + 15.0% - 12.5%
>=20 inch size + 15.0%-12.5%
>=20 inch size + 17.5%-12.5% (for Gr. B or lower) + 19.50% - 8.0% (Gr. X-42 or higher)
Single length of pipe + 10%,-3.5%
Carloades 40,000 lb (18,144 kg) or more - 1.75%, less - 3.5%
20 6.0 17.5 5.33 9.0 2.74 22.5 6.86
< 20 inch size +/- 0.75% <= 10 3/4 inch-Size + 1.59 mm (1/16")-0.40 mm (1/64") < 20 inch size + 15.0% - 12.5% Carloades 40,000 lb (18,144 kg) or more - 1.75%, less - 3.5% 40 12.0 35 10.67 14.0 4.27 45.0 13.72
IS:1978 60.3 and above +/ 1%
+0.75%-0.25%
<=273.1mm OD = + 1.60mm-0.40mm
323.9 mm OD & larger pipe = +2.40 mm-0.80 mm
101.6 mm to 457.2 mm OD=+ 15%-12.5% Single length of pipe + 10%, -3.5% - 6.0 - 5.3 - 2.70 - -
508 mm and above + 17.5% - 10.0% Carloades:- for min.
18,000 kg-1.75%
- 12.0 - 10.7 - 4.30 - -
1S:1979 < 508.0 mm OD +/- 0.75% < 273.1mm OD = + 1.60mm-0.40mm <= 457.0 mm OD pipe = +15.o%-12.5% Single length of pipe + 10%-3.5% - 6.0 - 5.3 - 2.70 - -
> 508.0 mm OD pipe =+/-1.0% 323.9 mm OD & larger pipe = + 2.40 mm - 0.80 mm >=508.0 mm OD pipe = +19.5%-8.0% Carloades:- for min.18,144 kg - 1.75% - 12.0 - 10.7 - 4.30 - -
ASTM A-53 Pipe 2" NPS and over=+/- 1.0% - At any point - 12.5% (Max)
Tm=Tn X 0.875
Tn=Nominal w.t
Tm=Minimum W.t
+/-10% 20
40
6.0
12.0
-
35
-
10.67
16
22
4.88
6.71
22
-
6.71
-
IS:3589 Upto 508 mm OD = +/- 0.75% - +/- 10% - - 6.0
12.0
-
-
-
-
-
-
4.00
7.00
-
-
7.0
14.0
IS:4270 +/- 1.0% - upto 406.4 mm OD= + 15%-12.5%
over 406.4 mm OD = +15%-10%
+10%-8% -
-
6.0
-
-
-
-
-
-
-
4.0
-
-
-
7.0
-
API-5CT 4-1/2" and larger = + 1.0%-0.5% od OD 5" larger = + 1.0%-0.016" -12.50% Single length of pipe +6.5%,-3.5%
Carloades:- for min 40,000 lb or more-1.75%
Range

ft/mtr

16/4.88
min
ft/mr
25/7.62
max
Range

ft/mtr

25/7.62
min
ft/mr
34/10.36
max
Range

ft/mtr

34/10.36
min
ft/mr
48/14.63
max


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