ASTM A269 is in standert spesifikaasje foar naadleaze en laske austenityske roestfrij stiel buizen foar algemiene korrosjebestindige en lege- as hege temperatuertsjinsten. ASTM A213 is in standert spesifikaasje foar naadleaze ferritic en austenitic alloy-stiel boiler, superheater, en waarmte-wikseler buizen.
STANDARD ASTMA249 ASTM A269 ASTMA270 ASTM213
| Standert | Tolerânsje fan bûtendiameter (mm) | Dikte fan de muorre(%) | Lengte tolerânsje (mm) | ||
| ASTM A249 | <25.0 | +0,10 -0,11 | ± 10% | ||
| ≥25,0-≤40,0 | ±0.15 | ||||
| >40.0-<50.0 | ±0.20 | OD<50,8 | +3,0-0,0 | ||
| ≥50.0~<65.0 | ±0.25 | ||||
| ≥65,0-<75,0 | ±0.30 | ||||
| ≥75.0~<100.0 | ±0.38 | OD≥50.8 | +5,0-0,0 | ||
| ≥100~≤200,0 | +0.38 -0.64 | ||||
| >200,0-≤225,0 | +0,38 -1,14 | ||||
| ASTM A269 | <38.1 | ±0.13 | |||
| ≥38.1~<88.9 | ±0.25 | ||||
| ≥88,9-<139,7 | ±0.38 | ±15.0% | OD <38.1 | +3,2-0,0 | |
| ≥139.7~<203.2 | ±0.76 | ±10,0% | 0D ≥38.1 | +4,0-0,0 | |
| ≥203.2-<304.8 | ±1.01 | ||||
| ≥304,8-<355,6 | ±1,26 | ||||
| ASTMA270 | ≤25,4 | ±0.13 | ± 10% | +10-0,0 | |
| >25,4-≤50,8 | ±0.20 | ||||
| >50.8~≤62 | ±0.25 | ||||
| >76,2- ≤101,6 | ±0.38 | ||||
| >101.6~<139.7 | ±0.38 | ||||
| ≥139,7–203,2 | ±0.76 | ||||
| ≥203 2~≤304.8 | ±1,27 | ||||
| ASTM 213 | D＜25.4 | ± 0.10 | +20/0 | +3.0/0 | |
| 25.4~38.1 | ±0.15 | ||||
| 38.1~50.8 | ±0.20 | ||||
| 50.8~63.5 | ±0.25 | +22/0 | +5.0/0 | ||
| 63.5~76.2 | ±0.30 | ||||
| 76.2~101.6 | ±0.38 | ||||
| 101.6~190.5 | +0,38/-0,64 | ||||
| 190.5~228.6 | +0,38/-1,14 | ||||
Post tiid: Jun-27-2023