ASTM A269 minangka spesifikasi standar kanggo pipa baja tahan karat austenitik sing mulus lan dilas kanggo layanan tahan korosi umum lan suhu rendah utawa dhuwur. boiler, superheater, lan tabung penukar panas. Bedane antarane A269, A249, lan A213 dumunung ing standar tartamtu sing diwakili kanggo pipa stainless steel.
STANDARD ASTMA249 ASTM A269 ASTMA270 ASTM213
| Standar | Toleransi Diameter njaba (mm) | Ketebalan tembok (%) | Toleransi dawa (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 | ||||
| ASTMA 270 | ≤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 | 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 | ||||
Wektu kirim: Jun-27-2023