Umahluko phakathi kwe-ASTM A249 A270 A269 kunye ne-A213 yensimbi engenasici.

I-ASTM A269 luphawu olusemgangathweni lwetyhubhu yentsimbi engenamthungo kunye newelding ye-austenitic stainless steel resisting jikelele kunye ne-low- or high-temperature services.ASTM A249 luphawu olusemgangathweni lwebhoyila yentsimbi edityanisiweyo ye austenitic, iheater, umtshintshi-bushushu, kunye neetyhubhu ezijiyayo. I-ASTM A213 yinkcazo esemgangathweni yebhoyila ye-ferritic engenamthungo kunye ne-austenitic alloy-steel, i-superheater, kunye neetyhubhu zokutshintsha ubushushu. Umahluko phakathi kwe-A269, A249, kunye ne-A213 ilele kwimigangatho ethile emele i-tubing 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