Differenza bejn ASTM A249 A270 A269 u A213 Tubi tal-istainless steel

ASTM A269 hija speċifikazzjoni standard għal tubi tal-istainless steel awstenitiku mingħajr saldatura u wweldjati għal servizzi ġenerali li jirreżistu l-korrużjoni u b'temperatura baxxa jew għolja. ASTM A213 hija speċifikazzjoni standard għal kaldarun tal-azzar lig ferritiku u awstenitiku mingħajr saldatura, superheater, u tubi ta 'skambjatur tas-sħana. Id-differenzi bejn A269, A249, u A213 jinsabu fl-istandards speċifiċi li jirrappreżentaw għal tubi tal-istainless steel.

STANDARD ASTMA249 ASTM A269 ASTMA270 ASTM213

Standard Tolleranza tad-Djametru ta' Barra
(mm)
Ħxuna tal-ħajt (%) Tolleranza tat-Tul (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
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
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

Ħin tal-post: Ġunju-27-2023