ASTM A269 ndi muyezo wokhazikika wa mapaipi osapanga dzimbiri a austenitic osapanga dzimbiri komanso olumikizidwa kuti agwiritsidwe ntchito polimbana ndi dzimbiri komanso kutentha pang'ono kapena kwakukulu. ASTM A249 ndi muyezo wokhazikika wa ma boiler a austenitic steel boiler, superheater, heat-exchanger, ndi condenser. ASTM A213 ndi muyezo wokhazikika wa ma boiler osapanga dzimbiri a ferritic ndi austenitic alloy-steel, superheater, ndi heat-exchanger. Kusiyana pakati pa A269, A249, ndi A213 kuli mu miyezo yeniyeni yomwe imayimira mapaipi osapanga dzimbiri a chitsulo.
Standard ASTMA249 ASTM A269 ASTMA270 ASTM213
| Muyezo | Kulekerera kwa M'mimba mwake wa Kunja (mm) | Makulidwe a khoma (%) | Kutalika Kulekerera (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 | ||||
Nthawi yotumizira: Juni-27-2023