I-ASTM A269 luphawu olusemgangathweni lwetyhubhu yentsimbi engenamthungo kunye newelded austenitic stainless steel resisting jikelele kunye neenkonzo eziphantsi okanye ezinobushushu obuphantsi.ASTM A249 luphawu olusemgangathweni oludityanisiweyo lwebhoyila yentsimbi edityanisiweyo ye austenitic, superheater, heat-exchanger, kunye necondenser tubes.ASTM A213 ye-austenitic ethize ye-austenitic ethile ye-austenitic ye-a213 ye-austenitic ecacileyo kwibhoyila, iheater, kunye neityhubhu zotshintshiselwano lobushushu.Umahluko phakathi kwe-A269, A249, kunye ne-A213 ilele kwimigangatho ethile emele iityhubhu yensimbi engenasici.
UMGANGATHO WE-ASTMA249 ASTM A269 ASTMA270 ASTM213
| Umgangatho | Ukunyamezelwa kweDayimitha yaNgaphandle (mm) | Ubunzima bodonga (%) | Ukunyamezela Ubude(mm) | ||
| I-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 | ||||
| I-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 | ||||
| I-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 | ||||
| I-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 | ||||
Ixesha lokuposa: Jun-27-2023