ASTM Specification & Tolerance For Tubing & Piping

Specification Allowable Outside Diameter Variation in mm Allowable Wall Thickness Variation Exact Length Tolerance in mm Testing
Nominal Diameter Over Under %Over %Under Over Under
ASTM-A213
Seamless Boiler
Superheater and
Heat Exchanger Tubes
Under 25.4 .1016 .1016 +20 -0 3.175 0 Flattening Test
25.4-38.1 incl .1524 .1524 +22 -0 3.175 0 Tension Test
38.1-50.8 excl .2032 .2032 +22 -0 3.176 0 Flare Test
50.8-63.5 excl .254 .254 +2 -0 4.46 0 Hardness Test
63.5-76.2 excl .3048 .3048 +22 -0 4.76 0 100% Hydrostatic test
76.2-101.6 incl .381 .381 +22 -0 4.76 0 Refer to ASTM A-450
ASTM-A249
Welded Boiler Superheater, Heat Exchanger And Condenser Tubes
Under 25.4 .1016 .1016 +10 -10 3.175 0 Tension Test
25.4-38.1 incl .1524 .1524 +10 -10 3.175 0 Flattening Test
38.1-50.8 Excl .2032 .2032 +10 -10 3.175 0 Flange Test
50.0-63.5 excl .254 .254 +10 -10 4.762 0 Reverse Bend Test
63.5-76.2 excl .3848 .3848 +10 -10 4.762 0 Hardness Test
76.2-101.6 incl .381 .381 +10 -10 4.762 0 100% Hydrostastic Test Refer to ASTM A-450
Minimum Wall tubes +18% 0 available On request
ASTM-A269
Seamless & Welded Tubing for General Service
Untp12.7 .13 .13 +15 -15 3.2 0 Flare Test (Seamless Only)
12.7-38.1 exc! .13 .13 +10 -10 3.2 0 Flange Test (Welded Only)
38.1-88.9 excl .25 .25 +10 -10 4.8 0 Hardness Test
88.9-139.7 excl .38 .38 +10 -10 4.8 0 Reverse Flattening Test
139.7-203.2 excl .76 .76 +10 -10 4.8 0 (Welded only)
100% Hydrostatic Test Refer to ASTM-A269
ASTM-A270
Seamless & Welded
Sanitary Tubing
25.4 .05 .20 +10.0 -10.0 3.2 0 Reverse flattening Test
38.1 .05 .20 +10.0 -10.0 3.2 0 100% Hydrostastic Test
50.8 .05 .28 +10.0 -10.0 3.2 0 External' polish on all tubes
60.5 .05 .28 +10.0 -10.0 3.2 0 Refer to ASTM A-270
76.2 .08 .30 +10.0 -10.0 3.2 0
101.6 .08 .38 +10.0 -10.0 3.2 0
ASTM-A312
Seemless & Welded
pipe
3.175-38.1 incl .4 .79 Minimum Wall 12.5% under nominal wall Specified 6.4 0 0 Tension Test
38.1-1016 incl .79 .79 6.4 0 0 Flattening Test
101.6-203.2 imcl 1.59 .79 6.4 0 0 100% Hydrostatic Test
(Normally Random Lengths ordered Refer to ASTM A-530
ASTM A-358
Welded pipe
219.08-750mm or 0.01 inch +0.5% -0.3 6.0 Refer to ASTM A-530