管线用无缝钢管,用于石油、天然气工业中的氧、水、油输送管。
标准:
API SPEC 5L——美国石油学会标准
GB/T9711.2——中国国家标准
主要生产钢管牌号:
B、X42、X52、X60、X65、X70 X40 X75 X80
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%