ASTM Specification & Tolerance For Tubing & Piping
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- 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 | Flattening Test Tension Test Flare Test Hardness Test100% Hydrostatic testRefer to ASTM A-450 | |
| ASTM-A213 | Under 25.4 | .1016 | .1016 | +20 | -0 | 3.175 | 0 | |
| Seamless Boiler | 25.4-38.1 incl | .1524 | .1524 | +22 | -0 | 3.175 | 0 | |
| Superheater and | 38.1-50.8 excl | .2032 | .2032 | +22 | -0 | 3.176 | 0 | |
| Heat Exchanger | 50.8-63.5 excl | .254 | .254 | +22 | -0 | 4.46 | 0 | |
| Tubes | 63.5-76.2 excl | .3048 | .3048 | +22 | -0 | 4.76 | 0 | |
| 76.2-101.6 incl | .381 | .381 | +22 | -0 | 4.76 | 0 | ||
| Under 25.4 | .1016 | .1016 | +10 | -10 | 3.175 | 0 | Tension Test Flattening Test Flange Test Reverse Bend Test Hardness Test100% Hydrostastic TestRefer to ASTM A-450 | |
| ASTM-A249 | 25.4-38.1 incl | .1524 | .1524 | +10 | -10 | 3.175 | 0 | |
| Welded Boiler | 38.1-50.8 Excl | .2032 | .2032 | +10 | -10 | 3.175 | 0 | |
| Superheater, Heat | 50.0-63.5 excl | .254 | .254 | +10 | -10 | 4.762 | 0 | |
| Exchanger And | 63.5-76.2 excl | .3848 | .3048 | +10 | -10 | 4.762 | 0 | |
| Condenser Tubes | 76.2-101.6 incl | .381 | .381 | +10 | -10 | 4.762 | 0 | |
| Minimum Wall tubes | ||||||||
| + 18% 0 available | ||||||||
| On request | ||||||||
| Untp 12.7 | .13 | .13 | +15 | -15 | 3.2 | 0 | Flare Test (Seamless Only) | |
| ASTM-A269 | 12.7-38.1 excl | .13 | .13 | +10 | -10 | 3.2 | 0 | Flange Test (Welded Only) |
| Seamless & Welded | 38.1-88.9 excl | .25 | .25 | +10 | -10 | 4.8 | 0 | Hardness Test |
| Tubing for General | 88.9-139.7 excl | .38 | .38 | +10 | -10 | 4.8 | 0 | Reverse Flattening Test |
| Service | 139.7-203.2 excl | .76 | .76 | +10 | -10 | 4.8 | 0 | (Welded only) |
| 100% Hydrostatic Test | ||||||||
| Refer to ASTM-A269 | ||||||||
| 25.4 | .05 | .20 | +10.0 | -10.0 | 3.2 | 0 | Reverse flattening Test 100% Hydrostastic Test External’ polish on all tubes Refer to ASTM A-270 | |
| 38.1 | .05 | .20 | +10.0 | -10.0 | 3.2 | 0 | ||
| ASTM-A270 | 50.8 | .05 | .28 | +10.0 | -10.0 | 3.2 | 0 | |
| Seamless & Welded | 60.5 | .05 | .28 | +10.0 | -10.0 | 3.2 | 0 | |
| Sanitary Tubing | 76.2 | .08 | .30 | +10.0 | -10.0 | 3.2 | 0 | |
| 101.6 | .08 | .38 | +10.0 | -10.0 | 4.8 | 0 | ||
| 3.175-38.1 incl | .4 | .79 | Minimum Wall | 6.4 | 0 | Tension Test Flattening Test100% Hydrostatic TestRefer to ASTM A-530 | ||
| 38.1-1016 incl | .79 | .79 | 12.5% under | 6.4 | 0 | |||
| ASTM-A312 | 101.6-203.2 incl | 1.59 | .79 | nominal wall | 6.4 | 0 | ||
| Seemless & Welded pipe | Specified | (Normally Random | ||||||
| Lengths ordered) | ||||||||
| ASTM A-358Welded pipe | 219.08-750mm | +0.5% | -0.3 | 6.0 | Refer to ASTM A-530 | |||