管線用無縫鋼管
標準:
API SPEC 5L——美國石油學會標準
GB/T9711.2——中國國家標準
用途:
用于石油、天然氣工業(yè)中的氧、水、油輸送管
主要生產(chǎn)鋼管牌號:
B、X42、X52、X60、X65、X70
尺寸公差:
鋼管種類
|
鋼管外徑(D)
|
鋼管壁厚(S)
|
管體
|
鋼管外徑 (mm)
|
允許偏差(mm)
|
鋼管外徑(mm)
|
允許偏差(mm)
|
≥60.3且S<20
|
±0.75%
|
≤73.0
|
+15%,-12.5%
|
≥60.3且S≥20
|
±1.00%
|
>73.0且S<20
|
+15%,-12.5%
|
|
|
>73.0且S≥20
|
+17.5%,-10
|
力學性能:
標準
|
牌號
|
抗拉強度(MPa)
|
屈服強度(MPa)
|
屈強比
|
伸長率(%)
|
0℃沖擊功
Akv(J)
|
熱處理狀態(tài)
|
API SPEC 5L
GB/T9711.2
|
B
|
≥415
|
245~440
|
≤0.80
|
22
|
≥40
|
正火
|
X42
|
≥415
|
290~440
|
≤0.80
|
21
|
≥40
|
正火
|
X52
|
≥460
|
360~510
|
≤0.85
|
20
|
≥40
|
正火
|
X60
|
≥520
|
415~565
|
≤0.85
|
18
|
≥40
|
正火
|
X65
|
≥535
|
450~570
|
≤0.90
|
18
|
≥40
|
淬火+回火
|
X70
|
≥570
|
485~605
|
≤0.90
|
18
|
≥40
|
淬火+回火
|
化學成分:
標準
|
牌號
|
化學成分(%)
|
CEV(%)
|
C
|
Si
|
Mn
|
P
|
S
|
V
|
Nb
|
Ti
|
API SPEC 5L
GB/T9711.2
|
B
|
≤0.16
|
≤0.40
|
≤1.10
|
≤0.020
|
≤0.010
|
-
|
-
|
-
|
≤0.42
|
X42
|
≤0.17
|
≤0.40
|
≤1.20
|
≤0.020
|
≤0.010
|
≤0.05
|
≤0.05
|
≤0.04
|
≤0.42
|
X52
|
≤0.20
|
≤0.45
|
≤1.60
|
≤0.020
|
≤0.010
|
≤0.10
|
≤0.05
|
≤0.04
|
≤0.45
|
X60
|
≤0.21
|
≤0.45
|
≤1.60
|
≤0.020
|
≤0.010
|
≤0.15
|
≤0.05
|
≤0.04
|
協(xié)議
|
X65
|
≤0.16
|
≤0.45
|
≤1.60
|
≤0.020
|
≤0.010
|
≤0.06
|
≤0.05
|
≤0.06
|
≤0.45
|
X70
|
≤0.16
|
≤0.45
|
≤1.70
|
≤0.020
|
≤0.010
|
≤0.06
|
≤0.05
|
≤0.06
|
≤0.45
|
注:
1.0.015%≤Altot<0.06%;N≤0.012%;Al/N≥2/1;Cu≤0.25%;Ni≤0.30%;Cr≤0.30%;Mo≤0.10%
2.V+Nb+Ti≤0.15
3.X60、X65、X70經(jīng)協(xié)商Mo≤0.35%
|