ASTM A269 ndi njira yodziwika bwino yamachubu achitsulo osasunthika komanso osasunthika a austenitic zosapanga dzimbiri komanso ntchito zosagwira dzimbiri komanso zotsika kapena kutentha kwambiri.ASTM A249 ndizomwe zimapangidwira zitsulo zowotchedwa austenitic boiler, superheater, heat-exchanger, ndi condenser chubu. ASTM A213 ndi ndondomeko yodziwika bwino ya zitsulo zosasunthika za ferritic ndi austenitic alloy-steel boilers, superheater, ndi heat-exchanger chubu.
STANDARD ASTMA249 ASTM A269 ASTMA270 ASTM213
| Standard | Kulekerera kwa Diameter Yakunja (mm) | Makulidwe a khoma (%) | Kulekerera Kwautali(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 | ||||
| Chithunzi cha ASMA270 | ≤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 | ||||
| Chithunzi cha 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 yotumiza: Jun-27-2023