API American Petroleum Institute Specifications
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API American Petroleum Institute Specifications for Line Pipe (1992)
规格（美国标准）
No. 型号 |
Process of Manufacture 制作程序 |
Grade 钢号 |
Chemical Composition 化学成份 % maximum 最大 |
Tensile Strength 抗拉强度 Ksi ( Mpa ) |
Yield Stress 屈服强度 Ksi ( Mpa ) |
Elongation (伸长率)% on 2 in |
Treatment 加工处理 |
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C |
Mn |
P & S |
Others 其它 |
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| API 5L | Seamless Non expanded or cold expanded or electric welded or butt welded only | A25 CI I | 0.21 | 0.30 ~ 0.06 | P 0.03 & S 0.03 |
- | 45 ( 310 ) | 25 ( 170 ) | _1) | _6) |
| Seamless Non expanded or cold expanded or electric welded or butt welded only | A25 CI II2) | 0.21 | 0.30 ~ 0.06 | P 0.045 ~ 0.08 S 0.03 |
- | 45 ( 310 ) | 25 ( 170 ) | _1) | _6) | |
| Seamless Non expanded or cold expanded | A | 0.22 | 0.90 | P 0.03 & S 0.03 |
- | 48 ( 330 ) | 30 ( 205 ) | _1) | _6) | |
| Welded Non expanded or cold expanded | 0.21 | 0.90 | P 0.03 & S 0.03 |
- | 48 ( 330 ) | 30 ( 205 ) | _1) | _6) | ||
| Seamless Non expanded or cold expanded | B | 0.27 | 1.15 | P 0.03 & S 0.03 |
_7) | 60 ( 415 ) | 35 ( 240 ) | _1) | _6) | |
| Welded Non expanded or cold expanded | 0.26 | 1.15 | P 0.03 & S 0.03 |
_7) | 60 ( 415 ) | 35 ( 240 ) | _1) | _6) | ||
| Seamless Non expanded | X42 3) | 0.29 | 1.25 | P 0.03 & S 0.03 |
_7) | 60 ( 415 ) | 42 ( 290 ) | _1) | _6) | |
| Seamless Cold expanded | 0.29 5) | 1.25 | P 0.03 & S 0.03 |
_7) | 60 ( 415 ) | 42 ( 290 ) | _1) | _6) | ||
| Welded Non expanded or cold expanded | 0.28 | 1.25 | P 0.03 & S 0.03 |
_7) | 60 ( 415 ) | 42 ( 290 ) | _1) | _6) | ||
| Seamless Non expanded | X46 3) | 0.31 | 1.35 | P 0.03 & S 0.03 |
_7) | 63 ( 435 ) | 46 ( 315 ) | _1) | _6) | |
| Seamless Cold expanded | 0.29 5) | 1.25 | P 0.03 & S 0.03 |
_7) | 63 ( 435 ) | 46 ( 315 ) | _1) | _6) | ||
| Welded Non expanded | 0.30 | 1.35 | P 0.03 & S 0.03 |
_7) | 63 ( 435 ) | 46 ( 315 ) | _1) | _6) | ||
| Welded Cold expanded | 0.28 | 1.25 | P 0.03 & S 0.03 |
_7) | 63 ( 435 ) | 46 ( 315 ) | _1) | _6) | ||
| Seamless Non expanded | X52 3) | 0.31 | 1.35 | P 0.03 & S 0.03 |
_7) | 66 ( 455 ) | 52 ( 360 ) | _1) | _6) | |
| Seamless Cold expanded | 0.29 5) | 1.25 | P 0.03 & S 0.03 |
_7) | 66 ( 455 ) | 52 ( 360 ) | _1) | _6) | ||
| Welded Non expanded | 0.30 | 1.35 | P 0.03 & S 0.03 |
_7) | 66 ( 455 ) | 52 ( 360 ) | _1) | _6) | ||
| Welded Cold expanded | 0.28 | 1.25 | P 0.03 & S 0.03 |
_7) | 66 ( 455 ) | 52 ( 360 ) | _1) | _6) | ||
| Seamless Non expanded or cold expanded or welded non expanded | X56 3) | 0.26 | 1.35 | P 0.03 & S 0.03 |
_7) | 71 ( 490 ) | 56 ( 360 ) | _1) | _6) | |
| Seamless Non expanded or cold expanded or welded non expanded | X60 3) | 0.26 | 1.35 | P 0.03 & S 0.03 |
_7) | 75 ( 515 ) | 60 ( 415 ) | _1) | _6) | |
| Seamless Non expanded or cold expanded | X65 3) | Analysis by agreement | 77 ( 530 ) | 65 ( 450 ) | _1) | _6) | ||||
| Welded Non expanded | X65 3) 4) | 0.26 | 1.40 | P 0.03 & S 0.03 |
_7) | 77 ( 530 ) | 65 ( 450 ) | _1) | _6) | |
| Seamless Non expanded or cold expanded | X70 | Analysis by agreement | 82 ( 565 ) | 70 ( 480 ) | _1) | _6) | ||||
| Welded Non expanded or cold expanded | 0.23 8) | 1.608) | P 0.03 & S 0.03 |
- | 82 ( 565 ) | 70 ( 480 ) | _1) | _6) | ||
| Seamless Non expanded or cold expanded | X80 | Analysis by agreement | 90 / 120 (620 / 825) |
80 ( 550 ) | _1) | _6) | ||||
| Welded Non expanded or cold expanded | 0.18 8) | 0.18 8) | P 0.03 & S 0.018 |
- | 90 / 120 (620 / 825) |
80 ( 550 ) | _1) | _6) | ||
| Notes: | |
1) The formula for the minimum elongation in 2in is e= 625,000 ( A0.2 / U0.9 ) where e= % elongation in 2in. A = cross sectional area of tensile specimen in square inches. U = specified tensile strength in psi. |
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| 2) Class II steel is rephosphorised. | |
3) In grades X42 through X 56, for each reduction of 0.01% below the maximum, an increase of 0.05% Mn above the specified maximum is permitted up to a maximum of 1.45% for grades X42, X46 and X52, and up to a maximum of 1.60% for grades X56, X60 and X65. |
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4) For X65 £ 16 in width thickness 0.5in. And less, the chemical composition shall be as shown or as agreed between purchaser and manufacturer. For other sizes and wall thickness, the chemical composition shall be agreed between purchaser and manufacturer. |
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| 5) For cold expanded seamless pipe ³ 20in, the C shall be 0.28% max. | |
6) Pipe furnishes to this specification may be as rolled, normalised and tempered, subcritically stress relieved, or subcritically age hardened, and X grades may be quenched and tempered. |
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| 7) Either Cb, V or Ti or a combination thereof shall be used at the discretion of the manufacturer. | |
| 8) Manganese level may be increased by 0.05% for each 0.01% decrease in carbon up to a maximum manganese level of 2.00%. |
