ASTM A269 ni vipimo vya kawaida vya mirija ya chuma cha pua ya austenitic isiyo na mshono na iliyounganishwa kwa huduma za jumla zinazostahimili kutu na joto la chini au la juu.ASTM A249 ni vipimo vya kawaida vya mirija ya boiler ya chuma cha austenitic iliyounganishwa, hita kubwa, kibadilisha joto, na kondensa.ASTM A213 ni vipimo vya kawaida vya mirija ya boiler ya feri na aloi ya austenitic isiyo na mshono, hita kubwa, na kibadilisha joto. Tofauti kati ya A269, A249, na A213 ziko katika viwango maalum wanavyowakilisha kwa mirija ya chuma cha pua.
ASTMA249 SANIFU 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 | ||||
Muda wa chapisho: Juni-27-2023