ASTM A269 umumiy korroziyaga chidamli va past yoki yuqori haroratli xizmatlar uchun choksiz va payvandlangan ostenitik zanglamaydigan po'lat quvurlar uchun standart spetsifikatsiyadir. ASTM A249 payvandlangan ostenitik po'lat qozon, super isitgich, issiqlik almashtirgich va kondensator quvurlari uchun standart spetsifikatsiyadir. ASTM A213 choksiz ferrit va ostenitik qotishma po'lat qozon, super isitgich va issiqlik almashtirgich quvurlari uchun standart spetsifikatsiyadir. A269, A249 va A213 o'rtasidagi farqlar ular zanglamaydigan po'lat quvurlar uchun ifodalaydigan maxsus standartlarda yotadi.
STANDART ASTMA249 ASTM A269 ASTMA270 ASTM213
| Standart | Tashqi diametrning bardoshliligi (mm) | Devor qalinligi (%) | Uzunlik bardoshliligi (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 | ||||
Nashr vaqti: 2023-yil 27-iyun