ASTM A269 - bu umumiy korroziya va yuqori haroratli qaynatish uchun oustenitli zanglamaydigan po'lat notekis va payvandlangan ayenit zanglali po'latdan yasalgan pubdencyadir. ASTM A213 - bu eskirgan temirchisiz va ayenitli qotish dastgohi, g'ayriqonunsiz po'lat quvuri uchun mo'ljallangan A269, A249 va A213 o'rtasidagi farq.
Astma249 ASTM A269 ASTM270 ASTM213
| Standart | Tashqi diametrli diametri (mm) | Devor qalinligi (%) | Uzunlikdagi bardoshlik (mm) | ||
| ASTM A249 | <25.0 | +0.10 -0.11 | ± 10% | ||
| ≥25.0-nichoq | ± 0.15 | ||||
| > 40.0- <50. <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 | Odl50.8 | + 5.0-0.0 | ||
| ≥100 ~ ~ ~ ~ ~ ~ ~ ~ ~ w | +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 | + 3.2-0.0.0 | |
| ≥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-≤50.8.8 | ± 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 | ||||
| Asm213 | D <25.4 | ± 0.10 | +20/0 | +,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 | ||||
Post vaqti: Jun-27-2023