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标准:
API SPEC 5L——美国石油学会标准
GB/T9711.2——中国标准
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% |