ASTM A269 umumy poslama garşy we pes ýa-da ýokary temperatura hyzmatlary üçin bökdençsiz we kebşirlenen austenit poslamaýan polat turbalar üçin standart spesifikasiýa. ASTM A249 kebşirlenen austenit polat gazany, super gyzdyryjy, ýylylyk çalşyjy we kondensator turbalary üçin standart spesifikasiýa. ASTM A213 bökdençsiz ferrit we austenit erginli polat gazany, super gyzdyryjy we ýylylyk çalşyjy turbalar üçin standart spesifikasiýa. A269, A249 we A213 arasyndaky tapawutlar poslamaýan polat turbalary üçin görkezýän aýratyn standartlarda durýar.
STANDARD ASTMA249 ASTM A269 ASTMA270 ASTM213
| Standart | Daşarky diametriň çydamlylygy (mm) | Diwaryň galyňlygy （%） | Uzynlyga çydamlylyk (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 | .0 15.0% | OD <38.1 | + 3.2-0.0 | |
| ≥139.7 ~ <203.2 | ± 0.76 | .0 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 | ||||
Iş wagty: Iýun-27-2023