ASTM A269 yog ib qho kev qhia tshwj xeeb rau seamless thiab welded austenitic stainless hlau tubing rau dav corrosion-resisting thiab qis-los yog high-temperature cov kev pab cuam. ASTM A213 yog ib qho kev qhia tshwj xeeb rau seamless ferritic thiab austenitic alloy-steel boiler, superheater, thiab heat-exchanger tubes.Qhov sib txawv ntawm A269, A249, thiab A213 yog nyob rau hauv cov qauv tshwj xeeb uas lawv sawv cev rau stainless hlau tubing.
ASTM 249 ASTM A269 ASTM 270 ASTM 213 Cov Lus Qhia
| Txuj | Kev kam rau sab nraud (mm) | Phab ntsa thickness (%) | Length kam rau ua (mm) | ||
| ASTM A 249 Cov khoom siv | <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 Cov khoom lag luam | <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 | ||||
| ASTM 270 UAS | ≤ 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 | ||||
| ASTM 213 UAS | D 25.4 | ± 0.10 | + 20/0 | +3.0/0 | |
| 25.4-38.1 Nws | ± 0.15 | ||||
| 38.1-50.8 Nws | ± 0.20 | ||||
| 50.8-63.5 Nws | ± 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 lub sij hawm: Jun-27-2023