ASTM A269 is a standard specification for seamless and welded austenitic stainless steel tubing for general corrosion-resisting and low- or high-temperature services.ASTM A249 is a standard specification for welded austenitic steel boiler, superheater, heat-exchanger, and condenser tubes. ASTM A213 is a standard specification for seamless ferritic and austenitic alloy-steel boiler, superheater, and heat-exchanger tubes.The differences between A269, A249, and A213 lie in the specific standards they represent for stainless steel tubing.
Latin Asma249 ASTM A269 ASTMA270 ASTM213
| Vexillum | Tolerantia extra diameter (M) | Wall Crassitudo (%) | Longitudo tolerantia (mm) | ||
| ASTM A249 | <25.0 | +0.10 -0.11 | ± X% | ||
| ≥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 | ||||
| Asma270 | ≤25.4 | ± 0.13 | ± X% | 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 II ≤304.8 | ± 1,27 | ||||
| Asm213 | 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 | ||||
Post tempus: Jun 27-2023