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Standard:
API SPEC 5L——API Standard
GB/T9711.2——CNS
Use:
Used as oxygen, water, and oil delivery pipe in oil and natural gas
industry.
Main Steel Pipe Model:
B,X42,X52,X60,X65,X70
Dimension Tolerance:
Steel Pipe Specification | Steel Pipe Outside Diameter(D) | Steel Pipe Wall Thickness(S) | ||
Pipe Body | Steel Pipe Outside Diameter (mm) | Allowable deviation (mm) | Steel Pipe Outside Diameter (mm) | Allowable Deviation (mm) |
≥60.3 And S<20 | ±0.75% | ≤73.0 | +15%,-12.5% | |
≥60.3 And S≥20 | ±1.00% | >73.0 And S<20 | +15%,-12.5% | |
>73.0 And S≥20 | +17.5%,-10 |
Mechanical Property:
Standard | Model | Tensile Strength(MPa) | Yield Strength(MPa) | Yield Strength | Tensile Stretch(%) | Ballistic Work | Heat Treatment |
API SPEC 5L GB/T9711.2 | B | ≥415 | 245~440 | ≤0.80 | 22 | ≥40 | normalizing |
X42 | ≥415 | 290~440 | ≤0.80 | 21 | ≥40 | normalizing | |
X52 | ≥460 | 360~510 | ≤0.85 | 20 | ≥40 | normalizing | |
X60 | ≥520 | 415~565 | ≤0.85 | 18 | ≥40 | normalizing | |
X65 | ≥535 | 450~570 | ≤0.90 | 18 | ≥40 | quencher backfire | |
X70 | ≥570 | 485~605 | ≤0.90 | 18 | ≥40 | quencher backfire |
Mechanical Property:
Standard | Model | Chemical Constituent(%) | CEV(%) | |||||||
C | Si | Mn | P | S | V | Nb | Ti | |||
API SPEC 5L GB/T9711.2 | B | ≤0.24 | ≤0.40 | ≤1.20 | ≤0.020 | ≤0.010 | - | - | - | ≤0.42 |
X42 | ≤0.24 | ≤0.40 | ≤1.20 | ≤0.020 | ≤0.010 | ≤0.05 | ≤0.05 | ≤0.04 | ≤0.42 | |
X52 | ≤0.24 | ≤0.45 | ≤1.60 | ≤0.020 | ≤0.010 | ≤0.10 | ≤0.05 | ≤0.04 | ≤0.45 | |
X60 | ≤0.24 | ≤0.45 | ≤1.60 | ≤0.020 | ≤0.010 | ≤0.15 | ≤0.05 | ≤0.04 | agreement | |
X65 | ≤0.24 | ≤0.45 | ≤1.60 | ≤0.020 | ≤0.010 | ≤0.06 | ≤0.05 | ≤0.06 | ≤0.45 | |
X70 | ≤0.24 | ≤0.45 | ≤1.70 | ≤0.020 | ≤0.010 | ≤0.06 | ≤0.05 | ≤0.06 | ≤0.45 |
Notice:
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,X70after negotiationMo≤0.35%