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Home - Products -管线用无缝钢管

管线用无缝钢管

管线用无缝钢管

标准:
API SPEC 5L——美国石油学会标准
GB/T9711.2——中国国家标准
用途:
用于石油、天然气工业中的氧、水、油输送管
主要生产钢管牌号:
B、X42、X52、X60、X65、X70

尺寸公差:

钢管种类

钢管外径(D)

钢管壁厚(S)

管体

钢管外径 (mm)

允许偏差(mm)

钢管外径(mm)

允许偏差(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

力学性能:

标准

牌号

抗拉强度(MPa)

屈服强度(MPa)

屈强比

伸长率(%)

0℃冲击功

Akv(J)

热处理状态

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

化学成分:

标准

牌号

化学成分(%)

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

协议

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经协商Mo≤0.35%

 
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