用途:用于石油、天然气工业中的气、水、油输送
API SPEC 5L-2011(管线管规范),是美国石油学会编制并发布的,在世界各地通用。该管主要材质为L245、L290、L360、L415、L480、GR.B、X42、X46、X56、X65、X70、X80、X100等钢级。
根据GB/T9711.1管线钢管性能要求的不同,按其回火温度的不同,可将回火分为以下几种:
【一】低温回火(150-250度)
低温回火所得组织为回火马氏体。其目的是在保持淬火钢的高硬度和高耐磨性的前提下,降低其淬火内应力和脆性,以免使用时崩裂或过早损坏。它主要用于各种高碳的切削刃具,量具,GB/T9711.1管线钢管,滚动轴承以及渗碳件等,回火后硬度一般为HRC58-64。
【二】中温回火(250-500度)
中温回火所得组织为回火屈氏体。其目的是获得高的屈服强度,弹性极限和较高的韧性。因此,它主要用于各种GB/T9711.1管线钢管和热作模具的处理,回火后硬度一般为HRC35-50。
【三】高温回火(500-650度)
高温回火所得组织为回火索氏体。习惯上将淬火加高温回火相结合的热处理称为调质处理,其目的是获得强度,硬度和塑性,韧性都较好的综合机械性能。因此,广泛用于汽车,GB/T9711.1管线钢管,机床等的重要结构零件,如连杆,螺栓,齿轮及轴类。回火后硬度一般为HB200-330。
力学性能:
Standard |
Product Level |
Steel grade |
Yield Strength (min), Mpa |
Tensile Strength(MPa) |
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 |
||
X70 |
483 |
565 |
||
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 |
||
X65N or L450N |
425~566 |
525~760 |
||
X70 or L480 |
484~565 |
565~768 |
||
X80 |
552~690 |
621~827 |
管线管化学元素表:
roduct Level |
Steel grade |
Chemical composition, % |
||||||||
C |
Mn |
P |
S |
Si |
V |
Nb |
Ti |
CEpcm |
||
PSL 1 |
B or L245 |
≤0.28 |
≤1.20 |
≤0.030 |
≤0.030 |
- |
- |
- |
- |
- |
x42 or L290 |
≤0.28 |
≤1.30 |
≤0.030 |
≤0.030 |
- |
- |
- |
- |
- |
|
X46 or L320 |
≤0.28 |
≤1.40 |
≤0.030 |
≤0.030 |
- |
- |
- |
- |
- |
|
X52 or L360 |
≤0.28 |
≤1.40 |
≤0.030 |
≤0.030 |
- |
- |
- |
- |
- |
|
X56 or L390 |
≤0.28 |
≤1.40 |
≤0.030 |
≤0.030 |
- |
- |
- |
- |
- |
|
X60 or L415 |
≤0.28 |
≤1.40 |
≤0.030 |
≤0.030 |
- |
- |
- |
- |
- |
|
X70 |
≤0.28 |
≤1.40 |
≤0.030 |
≤0.030 |
- |
- |
- |
- |
- |
|
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 |
≤1.30 |
≤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 |
- |
|
X65N or L450N |
≤0.24 |
≤1.40 |
≤0.025 |
≤0.015 |
≤0.45 |
≤0.10 |
≤0.05 |
≤0.04 |
- |
|
X70N |
≤0.24 |
≤1.40 |
≤0.025 |
≤0.015 |
≤0.45 |
≤0.10 |
≤0.05 |
≤0.04 |
- |
|
X80 |
≤0.24 |
≤1.40 |
≤0.025 |
≤0.015 |
≤0.45 |
≤0.10 |
≤0.05 |
≤0.04 |
- |
标准:
API SPEC 5L--美国石油学会标准
GB/T9711--中国国家标准
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 L245 L290 L320 L360 L390 L450 L485
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 |
|