执行标准：
API SPEC 5L
用途：
用于石油、天然气工业中的气、水、油输送，用于油井中抽取石油或天然气。
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 | |||
API SPEC 5L 化学成分
| 产品规定类别 | 钢级 | 化学成分 Chemical composition, % | ||||||||
C | Mn | P | S | Si | V | Nb | Ti | CEpcm | |||
API 5L GB/T9711.2 | PSL 1 | A or L210 | ≤0.22 | ≤0.90 | ≤0.030 | ≤0.030 | - | - | - | - | ≤0.25 |
B or L245 | ≤0.28 | ≤1.20 | ≤0.030 | ≤0.030 | - | - | - | - | ≤0.25 | ||
x42 or L290 | ≤0.28 | ≤1.30 | ≤0.030 | ≤0.030 | - | - | - | - | ≤0.25 | ||
X46 or L320 | ≤0.28 | ≤1.40 | ≤0.030 | ≤0.030 | - | - | - | - | ≤0.25 | ||
X52 or L360 | ≤0.28 | ≤1.40 | ≤0.030 | ≤0.030 | - | - | - | - | ≤0.25 | ||
X56 or L390 | ≤0.28 | ≤1.40 | ≤0.030 | ≤0.030 | - | - | - | - | ≤0.25 | ||
X60 or L415 | ≤0.28 | ≤1.40 | ≤0.030 | ≤0.030 | - | - | - | - | ≤0.25 | ||
PSL 2 | BR or L245R | ≤0.24 | ≤1.20 | ≤0.025 | ≤0.015 | ≤0.40 | c | c | ≤0.04 | ≤0.25 | |
X42R or L290R | ≤0.24 | ≤1.20 | ≤0.025 | ≤0.015 | ≤0.40 | ≤0.06 | ≤0.05 | ≤0.04 | ≤0.25 | ||
BN or L245N | ≤0.24 | ≤1.20 | ≤0.025 | ≤0.015 | ≤0.40 | c | c | ≤0.04 | ≤0.25 | ||
X42N or L290N | ≤0.24 | ≤1.20 | ≤0.025 | ≤0.015 | ≤0.40 | ≤0.06 | ≤0.05 | ≤0.04 | ≤0.25 | ||
X46N or L320N | ≤0.24 | ≤1.40 | ≤0.025 | ≤0.015 | ≤0.40 | ≤0.07 | ≤0.05 | ≤0.04 | ≤0.25 | ||
X52N or L360N | ≤0.24 | ≤1.40 | ≤0.025 | ≤0.015 | ≤0.45 | ≤0.10 | ≤0.05 | ≤0.04 | ≤0.25 | ||
X56N or L390N | ≤0.24 | ≤1.40 | ≤0.025 | ≤0.015 | ≤0.45 | ≤0.10 | ≤0.05 | ≤0.04 | ≤0.25 | ||
X60N or L415N | ≤0.24 | ≤1.40 | ≤0.025 | ≤0.015 | ≤0.45 | ≤0.10 | ≤0.05 | ≤0.04 | 协商 | ||
备注：c： 除非另有协议，否则V和Nb之和应≤0.06%。 | |||||||||||
API SPEC 5L 力学性能
标准 | 产品规定类别 | 钢级 | 屈服强度 | 抗拉强度 |
API 5L GB/T9711.2 | PSL 1 | A or L210 | 210 | 335 |
B or L245 | 245 | 415 | ||
x42 or L290 | 290 | 415 | ||
X46 or L320 | 320 | 435 | ||
X52 or L360 | 360 | 460 | ||
X56 or L390 | 390 | 490 | ||
X60 or L415 | 415 | 520 | ||
PSL 2 | BR or L245R | 245~450 | 415~760 | |
X42R or L290R | 290~495 | 415~760 | ||
BN or L245N | 245~450 | 415~760 | ||
X42N or L290N | 290~495 | 415~760 | ||
X46N or L320N | 320~525 | 435~760 | ||
X52N or L360N | 360~530 | 460~760 | ||
X56N or L390N | 390~545 | 490~760 | ||
X60N or L415N | 415~565 | 520~760 |
