ASTM A269 ni vipimo vya kawaida vya chuma kisicho na mshono na svetsade au svetsade au huduma za chini-au za juu-joto.Astm A249 ni hali ya kawaida kwa boiler ya chuma ya austenitic, superheater, exchanger, na bomba la kufunika. ASTM A213 ni vipimo vya kawaida vya boiler ya chuma isiyo na mshono na austenitic alloy-chuma, superheater, na mirija ya joto-exchanger. Tofauti kati ya A269, A249, na A213 ziko katika viwango maalum wanavyowakilisha kwa neli ya chuma.
Standard ASTMA249 ASTM A269 ASTMA270 ASTM213
| Kiwango | Uvumilivu wa kipenyo cha nje (mm) | Unene wa ukuta （%） | Uvumilivu wa urefu (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 | ||||
Wakati wa chapisho: Jun-27-2023