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line pipe

Line pipes are mostly used for transportation of gas, water, oil in petroleum,and natural gas industry.
API SPEC 5L (pipeline specification), the American Petroleum Institute prepared and published all over the world-wide.

Oil, gas or water extracted from ground is transported to the oil and gas industry companies through pipeline. It includes seamless and welded pipe, and has plain, threaded and socket end; it is connected to the tip welding, coupling connection, socket connections. Steel grade of line pipes are mainly GR.B, X42, X46, X56, X65, X70, X80, etc.

End finished line pipe Productive welding pipeline
Line pipes Line pipes
Helical weld pipe longitudinal welded pipe
Helical weld pipe longitudinal welded pipe
Schematic diagram of pipeline anti corrosion pipe line inside and outside anti corrosion
Schematic diagram of anti-corrosion Inside and outside anti-corrosion

Anson's supply scope:

Seamless Pipe    

Steel Grade: B, X42, X52, X60, X65, X70
Dimension: 1"/2"---24"
Process: HOT ROLLING, Hot Expanding, SSAW    
Steel Grade: B, X42, X52, X60, X65, X70, X80
Dimension: 5" -- 48"
Process: SSAW

Welding Pipe

Steel Grade: B, X42, X52, X60, X65, X70, X80
Dimension: 2“--30”

And, Anson can also provide anti-corrosion process for line pipes, which according to DIN30670, AWWA210 standard, such as the process FBE, 3PE, which can also be called as 3PP, 3LPP.

Mechanical Properties
Standard Grade Tensile(Mpa) Yield(Mpa) Yield Ratio Elongation(%) 0℃ Impact Akv(J) Heat Treatment
API SPEC 5L B ≥415 245~440 ≤0.80 22 ≥40 N
API SPEC 5L X42 ≥415 290~440 ≤0.80 21 ≥40 N
API SPEC 5L X52 ≥460 360~510 ≤0.85 20 ≥40 N
API SPEC 5L X60 ≥520 415~565 ≤0.85 18 ≥40 N
API SPEC 5L X65 ≥535 450~570 ≤0.90 18 ≥40 H+T
API SPEC 5L X70 ≥570 485~605 ≤0.90 18 ≥40 H+T

Chemical composition:
Standard Grade Composition(%) CEV(%)
C Si Mn P S V Nb Ti
API SPEC 5L B ≤0.16 ≤0.40 ≤1.10 ≤0.020 ≤0.010 ≤0.42
API SPEC 5L X42 ≤0.17 ≤0.40 ≤1.20 ≤0.020 ≤0.010 ≤0.05 ≤0.05 ≤0.04 ≤0.42
API SPEC 5L X52 ≤0.20 ≤0.45 ≤1.60 ≤0.020 ≤0.010 ≤0.10 ≤0.05 ≤0.04 ≤0.45
API SPEC 5L X60 ≤0.21 ≤0.45 ≤1.60 ≤0.020 ≤0.010 ≤0.15 ≤0.05 ≤0.04 ≤0.45
API SPEC 5L X65 ≤0.16 ≤0.45 ≤1.60 ≤0.020 ≤0.010 ≤0.06 ≤0.05 ≤0.06 ≤0.45
API SPEC 5L X70 ≤0.16 ≤0.45 ≤1.70 ≤0.020 ≤0.010 ≤0.06 ≤0.05 ≤0.06 ≤0.45


Flow chart of inside corrosion resistance technology

Inside corrosion resistance technology flow diagram

Flow chart of outside corrosion resistance technology

Outside corrosion resistance technology flow diagram

Productive process of linepipe

A . Seamless Pipes

B. Welding Pipes

Oil pipeline perforation Productive process of welding and seamless line pipes
Perforation Welding
AD - PE coating Quenching of oil pipeline
AD - PE coating Quenching
Hydraulic test for sales pipeline NDT of line pipes
Hydrostatic test NDT
UT test of welding pipeline UI trasonic test of pipeline
UI trasonic test UT

Quality Assurance of API linepipe

We promise we will provide the pipes completely according to API/DIN requirements, and all of our mills have been authorized/ certificated by American Petroleum Institute. We are always looking forward to our client’s inspection of the production process, as we have adequate confidence in its quality.

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