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

标准
Standard

产品规定类别
PSL

钢级
Steel grade

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%。
Note: c: The sum of the columbium [niobium], and vanadium contents shall not exceed 0.06% except that, by agreement between the purchaser and
the manufacturer, an alternative maximum may be established.

标准
Standard

产品规定类别
Product Specification Level

钢级
Steel grade

屈服强度
Yield Strength (min), Mpa

抗拉强度
Tensile Strength(min), 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

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