Size tolerance table of astm a312:
| Standard | Out diameter (mm) | Wall thickness (mm) | Length (mm) | |
| ASTM A312 | ≤48.26 | +0.40 -0.80 |
+(Unspecified) -12.50% |
Definite cut length +6.40 -0 |
| ＞48.26~114.30 | +0.80 -0.80 | |||
| ＞114.30~219.08 | +1.60 -0.80 | |||
| ＞219.08~457.20 | +2.40 -0.80 | |||
| ＞457~660 | +3.20/-0.80 | |||
| ＞660~864 | +4.00/-0.80 | |||
| ＞864~1219 | +4.48/-0.80 | |||
