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)


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