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Home - Products -管線用無縫鋼管

管線用無縫鋼管

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、天然氣工業中的氧、水、油輸送管
主要生產鋼管牌號:
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

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經協商Mo≤0.35%

 
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