管线用无缝钢管
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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%




About Sunny Steel

Our team are highly trained and experienced in servicing and producing all types of steel supplies. Whether you've got a large construction project, or need parts for industrial machinery, our team of steel fabrication consultants will ensure that your project is provided with the parts you need, when you need them.

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