Steel Pipes


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Standard
API SPEC 5LAPI Standard
GB/T9711.2CNS
Outside Diameter:20mm to 630mm
Use
Used as oxygen, water, and oil delivery pipe in oil and natural gas industry.
Main Steel Pipe Model
B,X42,X52,X60,X65,X70,ST 52.3/S355J2H/E355/FE510

Pipe-Line Seamless Steel Pipe in liquid transportation are mainly applied to petroleum and gas long-distance transportation, as well as industrial and civilian liquid transportation system.
Structure usage is also adaptive.

Dimension Tolerance:

Steel Pipe Specification

Steel Pipe Outside DiameterD

Steel Pipe Wall ThicknessS

Pipe Body

Steel Pipe Outside Diameter (mm)

Allowable deviation (mm)

Steel Pipe Outside Diameter (mm)

Allowable Deviation (mm)

≥60.3S20

±0.75

≤73.0

15,12.5

≥60.3S≥20

±1.00

73.0S20

15,12.5

73.0S≥20

17.5,10

Mechanical Property

Standard

Model

Tensile StrengthMPa

Yield StrengthMPa

Yield Strength
Ratio

Tensile Stretch

Ballistic Work
AkvJ

Heat Treatment
State

API SPEC 5L

GB/T9711.2

B

≥415

245?440

≤0.80

22

≥40

normalizing

X42

≥415

290?440

≤0.80

21

≥40

normalizing

X52

≥460

360?510

≤0.85

20

≥40

normalizing

X60

≥520

415?565

≤0.85

18

≥40

normalizing

X65

≥535

450?570

≤0.90

18

≥40

quencher backfire

X70

≥570

485?605

≤0.90

18

≥40

quencher backfire

Mechanical Property:

Standard

Model

Chemical Constituent

CEV

C

Si

Mn

P

S

V

Nb

Ti

API SPEC 5L

GB/T9711.2

B

≤0.16

≤0.40

≤1.10

≤0.020

≤0.010

≤0.42

X42

≤0.17

≤0.40

≤1.20

≤0.020

≤0.010

≤0.05

≤0.05

≤0.04

≤0.42

X52

≤0.20

≤0.45

≤1.60

≤0.020

≤0.010

≤0.10

≤0.05

≤0.04

≤0.45

X60

≤0.21

≤0.45

≤1.60

≤0.020

≤0.010

≤0.15

≤0.05

≤0.04

agreement

X65

≤0.16

≤0.45

≤1.60

≤0.020

≤0.010

≤0.06

≤0.05

≤0.06

≤0.45

X70

≤0.16

≤0.45

≤1.70

≤0.020

≤0.010

≤0.06

≤0.05

≤0.06

≤0.45

Notice
1.0.015≤Altot0.06N≤0.012Al/N≥2/1Cu≤0.25Ni≤0.30Cr≤0.30Mo≤0.10
2.VNbTi≤0.15
3.X60X65X70after negotiationMo≤0.35



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