ASTM A269 jẹ sipesifikesonu boṣewa fun aisi-ara ati welded austenitic alagbara, irin ọpọn iwẹ fun ipata gbogbogbo ati awọn iṣẹ iwọn otutu kekere tabi giga.ASTM A249 jẹ sipesifikesonu boṣewa fun igbomikana irin austenitic welded, superheater, paarọ-ooru, ati awọn tubes condenser.ASTM A213 sipesifikesonu ni pato. alloy-steel igbomikana, superheater, ati ooru-exchanger tubes.Awọn iyato laarin A269, A249, ati A213 dubulẹ ni pato awọn ajohunše ti won ašoju fun irin alagbara, irin ọpọn.
Standard ASTMA249 ASTM A269 ASTMA270 ASTM213
| Standard | Ifarada ti Ita opin (mm) | Sisan ogiri (%) | Ifarada Gigun (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 | ||||
| ASTM213 | 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 | ||||
Akoko ifiweranṣẹ: Jun-27-2023