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Large Diameter ERW Steel Pipe

large diameter ERW steel pipe, API 5L large diameter ERW steel pipe, ASTM A53 large diameter ERW Steel pipe, material: PSL1/PSL2 B,X42,X52,X56,X60,X65,X70,X80,Q235,Q345.

Description

Large diameter ERW steel pipe


Description of large diameter ERW steel pipe

Outer diameter: 406.4mm-660.4mm

Wall thickness: 6.4mm-34.9mm

Standard: API 5L, ISO3183, GB/T 9711, DNV-OS-F101, ASTM A671, ASTM A672 etc.

Steel grade: X42-X80, Q235, Q345 etc.

Unit length: 5.8m-12.5m

Annual output: 150,000tons.



Main tolerance of large diameter ERW steel pipe

1.Pipe except the end diameter tolerance

D≤60.3mm-0.8mm, +0.4mm
60.3mm<D≤168.3mm±0.0075D
168.3mm<D≤609.6mm±0.0075D Maximum is ±3.2mm
609.6mm<D≤1422mm±0.005D Maximum is ±4.0mm

2.Pipe end diameter tolerance

D≤168.3mm-4mm, +1.6mm
168.3mm<D≤609.6mm±0.005D, Maximum is ±1.6mm
609.6mm<D≤1422mm±1.6mm

3.Thickness tolerance

t≤5.0mm±0.5mm
5mm<t<15mm±1.0t
15mm≤t±1.5mm

4.Length

±500mm


5.Straightness

≤0.2%L


6.Out-of roundness

60.3mm≤D≤609.6mm0.015D



Surface painting of large diameter ERW steel pipe

No painting/Bare surface

varnish painting

black painting

hot dipped galvanized

3LPE

3PP

FBE

zinc phosphate primer

other painting can be made as per customers' request

surface painting large diameter ERW steel pipe.jpg


Packing of large diameter ERW steel pipe

End protect: plastic end caps, pipe ends protectors

Surface protect:  cutton ropes for each ends to avoid friction between pipes. 

Other packing ways can be made as per customers' request


packing large diameter ERW steel pipe.jpg

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