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. ASTM A213 minangka spesifikasi standar kanggo boiler baja paduan feritik lan austenitik sing mulus, superheater, lan tabung penukar panas. Bedane antarane A269, A249, lan A213 ana ing standar khusus sing diwakili kanggo pipa baja tahan karat.
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