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Tianjin Lefin Industrial Co.,Ltd

Our main products include 1/2inch to 16 inch ERW PIPE/GI PIPE which has been produced according to BS1387/ASTM A53/EN10219/EN10255/EN10217 Standard

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Tianjin Lefin Industrial Co.,Ltd.

Our main products include 1/2inch to 16 inch ERW PIPE/GI PIPE which has been produced according to BS1387/ASTM A53/EN10219/EN10255/EN10217 Standard

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Has rich experience in steel pipe processing, can be customized according to customer requirements according to the drawing and sample processing, assist in the development of new products.

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Tanzania API 5L PSL1 X52 Line Pipe

API 5L PSL1 X52 Line Pipe Grades: Gr.A, Gr.B, A25, X42, X46, X52, X56, X60, X65, X70, X80M, X90M, X100M, X120M. Product Specification Level: PSL1, PSL2. Outer Diameter Range: 1/2" to 2", 3", 4", 6", 8", 10", 12", 16 inches, 18 inches, 20 inches, 24 inches up to 40 inches. Manufacturing Types: ERW, LSAW, SMLS. Thickness Schedule: SCH 10, SCH 20, SCH 40, SCH STD, SCH 80, SCH XS, to SCH 160. Ends Type: Beveled ends, Plain ends. Surface Treatment: Natural, Varnished, Black Painting, FBE, 3PE (3LPE), 3PP, CWC (Concrete Weight Coated) CRA Clad or Lined.

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Product Description

Basic Information
API 5L PSL1 X52 is a widely used steel grade for line pipes in the oil and gas industry due to its balanced mechanical properties, corrosion resistance, and cost-effectiveness.

API 5L PSL1 X52 Line Pipe
Grades: Gr.A, Gr.B, A25, X42, X46, X52, X56, X60, X65, X70, X80M, X90M, X100M, X120M.
Product Specification Level: PSL1, PSL2.
Outer Diameter Range: 1/2" to 2", 3", 4", 6", 8", 10", 12", 16 inches, 18 inches, 20 inches, 24 inches up to 40 inches.
Manufacturing Types: ERW, LSAW, SMLS.
Thickness Schedule: SCH 10, SCH 20, SCH 40, SCH STD, SCH 80, SCH XS, to SCH 160.
Ends Type: Beveled ends, Plain ends.
Surface Treatment: Natural, Varnished, Black Painting, FBE, 3PE (3LPE), 3PP, CWC (Concrete Weight Coated) CRA Clad or Lined.

Application: Widely used steel grade for line pipes in the oil and gas industry.
Chemical Composition
API 5L PSL1 X52 specifies the following maximum chemical element content (weight %):

Element	Maximum (%)	Significance
Carbon (C)	0.28	Affects strength and weldability. Higher carbon increases hardness but reduces ductility.
Manganese (Mn)	1.40	Enhances strength and hardenability. Balances ductility and toughness.
Phosphorus (P)	0.030	Impurity; reduces toughness and promotes brittleness.
Sulfur (S)	0.030	Impurity; causes hot cracking during welding.
Silicon (Si)	0.45	Deoxidizer; improves strength and resistance to oxidation.

Note: PSL1 allows slightly higher impurity limits (e.g., Sulfur and Phosphorus) compared to PSL2, making it more cost-effective but less stringent in critical applications.

Mechanical Properties
API 5L PSL1 X52 must meet the following mechanical requirements:

Property	Value Range	Significance
Yield Strength (YS)	≥ 52,200 psi (360 MPa)	Minimum strength required to resist plastic deformation under pressure.
Tensile Strength (TS)	≥66,700 psi (460 MPa)	Ultimate strength before failure. TS/YS ratio ensures strain capacity.
Elongation	≥ 21% (for 2-inch gauge length)	Measures ductility; critical for forming and bending pipes.

Additional Requirements:

Hardness: Typically ≤ 248 HV10 (Vickers hardness) to avoid hydrogen-induced cracking.

Charpy Impact Test: Not mandatory for PSL1 (required for PSL2).

Applications
API 5L PSL1 X52 pipes are extensively used in the following applications:

Oil and Gas Pipelines: Suitable for transporting oil, natural gas, and other fluids under high-pressure conditions.

Water Supply Systems: Used in municipal water pipelines due to their corrosion resistance.

Offshore and Onshore Projects: Ideal for both onshore and offshore applications due to their strength and durability.

Structural Applications: Used in construction and industrial projects where high strength and reliability are required.

Advantages
High Strength and Durability: X52 pipes offer sufficient strength for high-pressure applications while maintaining good ductility.

Cost-Effectiveness: Compared to higher grades like X60 or X65, X52 provides a cost-effective solution without compromising on performance.

Excellent Weldability: The controlled carbon content and alloying elements ensure ease of welding, which is crucial for large-scale pipeline construction.

Corrosion Resistance: The low sulfur and phosphorus content, along with alloying elements like chromium, enhance corrosion resistance.

Versatility: Suitable for a wide range of applications, including sour service environments with additional coatings.

Comparison With Other Grades

Grade	YS,min (psi)	TS,min (psi)	Key Applications	Advantages Over X52	Limitations vs. X52
X42	42,100	60,200	Low-pressure pipelines, water systems	Lower cost, easier to weld	Lower strength limits capacity
X60	60,200	75,400	High-pressure gas pipelines	Higher pressure handling	Higher cost, stricter welding controls
X65	65,300	77,600	Deepwater pipelines, Arctic conditions	Superior strength for harsh environments	Complex heat treatment required
X70	70,300	82,700	Ultra-high-pressure gas transmission	Maximizes throughput efficiency	Limited availability, higher price

API 5L PSL1 X52 is a versatile and cost-effective steel grade that offers a balance of strength, toughness, and corrosion resistance. Its controlled chemical composition and mechanical properties make it suitable for a wide range of applications in the oil, gas, and water transportation industries. Compared to other grades, X52 provides a reliable solution for medium to high-pressure applications without the need for more expensive materials.