STEEL PIPE

STEEL

GRADE

CHEMICAL COMPOSITION%

MECHANICAL PROPERTIES

C(%)

Si(%)

(≤)

Mn(%)

P(%)

(≤)

S(%)

(≤)

Ni(%)

(≤)

Cr(%)

(≤)

Cu(%)

(≤)

Yield(MPa)

(≥)

Tensile(Mpa)

Elongation

(≥)

Q195

0.06-0.12

0.3

0.25-0.50

0.045

0.05

0.03

0.03

0.03

195

315-390

32

Q215A

0.09-0.15

0.3

0.25-0.55

0.045

0.05

0.03

0.03

0.03

215

335-410

26

Q215B

0.09-0.15

0.3

0.25-0.55

0.045

0.045

0.03

0.03

0.03

215

335-410

26

Q235A

0.14-0.22

0.3

0.3-0.65

0.045

0.05

0.03

0.03

0.03

235

375-460

21

Q235B

0.14-0.22

0.3

0.3-0.7

0.045

0.045

0.03

0.03

0.03

235

375-460

21

Q235C

≤0.18

0.3

0.35-0.80

0.04

0.04

0.03

0.03

0.03

235

375-460

21

Q235D

≤0.17

0.3

0.35-0.80

0.035

0.035

0.03

0.03

0.03

235

375-460

21

SQUARE AND RECTANGLE PIPE SIZE

SIZE

(mm)

THICKNESS

（mm)

SIZE

(mm)

THICKNESS

(mm)

SIZE

(mm)

THICKNESS

(mm)

SIZE

(mm)

THICKNESS

(mm)

10×10

0.6-1.0

20x10

0.6-1.0

70×70

1.5-6.0

125x50

3.0-6.0

12×12

0.6-1.0

25x12

0.6-1.0

75x75

1.5-6.0

125x75

3.0-6.0

16x16

0.6-1.2

38x19

0.6-1.5

80x80

2.0-6.0

150x50

3.0-6.0

19×19

0.6-1.5

50×25

0.6-1.5

90x90

2.0-6.0

150×75

3.0-6.0

20×20

1.6-1.5

50x30

1.6-3.0

100x100

2.3-6.0

150x100

4.0-12

25×25

1.0-2.75

60x40

1.5-3.5

120×120

4.0-6.0

160x80

4.0-6.0

30x30

1.0-2.75

75x50

1.5-4.0

125x125

4.0-6.0

175x100

4.0-10

32x32

1.0-3.0

80x40

1.5-4.0

150x150

4.0-8.0

200×100

4.0-10

38×38

1.0-3.0

100x50

2.0-6.0

200×200

4.0-10

200x150

4.0-10

40x40

1.0-3.5

100x60

2.0-6.0

250x250

5.0-10

250×150

5.0-10

50x50

1.0-5.0

100x75

2.0-6.0

300×300

5.0-10

300×200

5.0-10

60x60

1.0-6.0

120x60

3.0-6.0

400x400

5.0-10

400x200

5.0-10

63.5x63.5

1.0-6.0

120x80

3.0-6.0

500x500

5.0-10

500x300

5.0-10

NAME

STEEL GRADE

SPECIFICATION   

EXECUTIVE STANDARD

MAIN APPLICATION

OIL PIPE

J55, N80-1

φ33.4~114.3.x3.18~7.82

API SPEC 5CT

GB/T 19830

OIL PIPE USED IN THE OIL & GAS

 INDUSTRY

CASING PIPE

H40.J55.K55.N80-1

φ114.3~339.7x5.21~11.43

API SPEC 5CT

GB/T 19830

CASING PIPE USED IN THE

 WELL OF OIL & GAS INDUSTRY  

LINE PIPE

A.B.X42.X46.X52.Z56.Z60.

X65.X70.L245

.L290.L320.L360.L390.L415.

L450.L485.L245MB.L290MB.

L360MB.L415MB.L450MB.L485MB

φ33.4~406.4x2.1~12.7

API SPEC 5L

GB/T9711.1

GB/T9711.2

PIPELINE TRANSMISSION

OF OIL 

& GAS INDUSTRY

FLUID TRANSMISSION

Q195.Q215A.Q215B.

Q235A.Q235B.Q295A.

Q295B.Q345A.Q345B.

φ33.7~406.4x2.0~12.7

GB/T3091

LOW PRESSURE FLUID

(WATER, GAS) TRANSMISSION   

WELDED STEEL PIPE

08.10.15.20.Q195.Q215A.  

 Q215B.Q235A.Q235B.Q235C. 

 Q295A.Q295B.

Q345A.Q345B.Q345C

φ33.4~406.4x2.0~12.7

GB/T13793

HFW PIPES FOR

COMMON APPLICATION

UNCOATED &GALVANIZED

   WELDED STEEL PIPE

GradeA.GradeB

φ33.4~406.4x3.38~12.7

ASTM A53/A53M

UNCOATED & GALVANIZED

WELDED STEEL PIPE

WELDED STEEL PIPES

FOR  PRESSURE

P195TR1.P195TR2.

P235TR1.P235TR2.

P265TR1.P265TR2

φ33.7~406.4x2.0~12.5

EN10217-1

WELDED STEEL PIPES FOR

PRESSURE APPLICATION

PILING PIPE

GRADE1.GRADE2.GRADE3

φ152.4~406.4x3.4~12.7

ASTM A252

PILLING PIPES FOR

PERMANENT LOAD

SUPPORTING FUNCTION

COLD-FORMED

WELDED UNALLOYED

STRUCTURE STEEL

S235JRH.

S275JOH.S355JOH.

C250.C350.C450.

GRADE1.GRADE2

φ33.4~406.4

x2.0~12.5

φ33.7~406.4

x2.0~12.7

EN10219-1

EN10219-2

AS/NZS 1163

AS/NZS 1074

WELDED STEEL PIPES

FOR STRUCTURAL

APPLICATION

HIGH STRENGTH

ATMOSPHERIC CORROSION

 RESISTING WELDED

STEEL TUBES FOR

STRUCTURAL PURPOSE

Q300GNH.Q325GNH.

Q355GNH

φ33.7~355.6x2.0~12.7

YB/T 4112

HIGH STRENGTH

ATMOSPHERIC

CORROSION RESISTING

WELDED STEEL TUBES

FOR STRUCTURAL PURPOSE