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.


Line pipes	Line pipes

Helical weld pipe	longitudinal welded pipe

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”
Process: ERW, SAWL, HFW, JCOE

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（%）
Standard	Grade	C	Si	Mn	P	S	V	Nb	Ti	CEV（%）
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

Remark：
1．0.015%≤Altot<0.06%；N≤0.012%；Al/N≥2/1；Cu≤0.25%；Ni≤0.30%；Cr≤0.30%；Mo≤0.10%
2．V+Nb+Ti≤0.15
3．X60、X65、X70-Mo≤0.35%

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

1. Ingot heating
2. Perforation
3. Rolling and sizing
4. Cooling
5. Straightener
6. NDT, UT
7. End cutting
8. Coupling thread (permium thread available)
9. Hydrostatic test, x-ray test.
10. Painting and thread protecting
11. Packing

B. Welding Pipes

1. Open
2. Cutting
3. Welding
4. Shaping
5. Polishing
6. Correcting
7. Heat treatment
8. Eddy Current Test, Cutting
9. HT
10. Pickling and inspection
11. Painting, packing.


Perforation	Welding

AD - PE coating	Quenching

Hydrostatic test	NDT

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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