Products Description

LASW Line Pipe, namely Longitudinally Submerged Arc Welding, is a straight seam welded pipe manufactured by submerged arc welding process. Its characteristics are that the inside and outside of the pipe body are welded, and the weld is developed along the longitudinal direction of the steel pipe.

Features

High Strength
LASW Line Pipe adopts longitudinal submerged arc welding process and has excellent mechanical properties. Its tensile strength is usually above 450 MPa, while its yield strength can reach above 350 MPa. This makes LASW straight seam pipe perform well in environments with high pressure and high strength requirements. For example, the common specification is Φ219mm×6mm, and its tensile strength and yield strength meet the requirements of API 5L standard, which is suitable for high-demand environments such as oil and natural gas pipelines.

Excellent welding performance
LASW Line Pipe has excellent welding performance, and the heat affected zone and weld during welding show good uniformity. This is due to the submerged arc welding technology it adopts, which has fast welding speed and high weld quality. Specifically, the welding current is generally set in the range of 600-800A and the voltage is between 25-35V, which ensures the strength and stability of the welded joint and reduces welding defects.

Strong corrosion resistance
LASW Line Pipe has strong corrosion resistance, especially after anti-corrosion treatment, it can effectively resist chemical corrosion and physical erosion in the environment. Common anti-corrosion treatments include epoxy coal tar coating and external heat shrink tubing. Taking a Φ273mm×8mm pipe as an example, the thickness of its anti-corrosion coating usually reaches 2-3mm, which can significantly increase the service life of the pipe.

Size range and tolerance
LASW Line Pipe are produced in a wide range of sizes, with outer diameters ranging from Φ219mm to Φ1420mm and wall thicknesses ranging from 5mm to 30mm. Its tolerance control is strict, with an outer diameter tolerance within ±1mm and a wall thickness tolerance within ±0.5mm. This precise size control ensures the adaptability and sealing of the pipe in actual applications.

Product Parameters

Product Name	LASW Line Pipe
Out Diameter	457-1422mm
Wall Thickness	8-50mm
Material Standard	API 5L
Steel Grade	Gr.B, X42, X46, X52, X56, X60, X65, X70, X80
Surface	Black painting, oil vanish etc.
Packing	Plastic Film, Plastic Cap, Bundle, Woven bag, Wooden Case, Iron Frame
Delivery	Within 3 days with stock, 15-50 days based on production
Payment	T/T, D/P, L/C at sight, Usance L/C etc.

Chemical Requirements

Composition, % for PSL 1 Pipe
Grade	C	Mn	P	S
	max	max	max	max
Welded Pipe
B	0.26	1.20	0.030	0.030
X42	0.26	1.30	0.030	0.030
X46	0.26	1.40	0.030	0.030
X52	0.26	1.40	0.030	0.030
X56	0.26	1.40	0.030	0.030
X60	0.26	1.40	0.030	0.030
X65	0.26	1.45	0.030	0.030
X70	0.26	1.65	0.030	0.030

Mechanical Property

Requirements for the Results of Tensile Tests for PSL 1 Pipe
Grade	Tensile strength min Mpa	Yield strength min Mpa
B	415	245
X42	415	290
X46	435	320
X52	460	360
X56	490	390
X60	520	415
X65	535	450
X70	570	485

Product Show

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Product Packing

To ensure safe transportation without damage, we adopt suitable standardized packaging for all goods, ensuring good appearance, secure fastening, density, and resistance to deformation.

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Why Choose us

1. We accept a variety of payment methods, such as T/T, D/P, L/C at sight, Usance L/C, etc.
2. To meet urgent order needs, we promise delivery within three days for spot orders and within 15 days for production orders.
3. To ensure product quality, we can arrange for third-party organizations to conduct product testing.
4. We maintain a large stock of products for emergencies and possess complete production capacity to meet delivery requirements.

If you have any questions about LSAW line pipes, please contact us, and we will reply within one hour.
Email: johnny@yqpipeline.com
WhatsApp: +86 15632733100
Tel: +86 317 6376727

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FAQ

Q: What is LASW Line Pipe?

A: LASW Line Pipe, or Longitudinally Submerged Arc Welded Pipe, is a type of steel pipe used predominantly in the oil and gas industry for transporting fluids over long distances. It is characterized by its large diameter and high-strength properties.

Q: How is LASW Line Pipe manufactured?

A: It is manufactured by rolling a flat steel plate into a cylindrical shape and then welding the edges longitudinally using the submerged arc welding (SAW) process, which ensures a high-quality, strong weld.

Q: What are the typical applications of LASW Line Pipe?

A: LASW Line Pipe is primarily used in pipelines for the transportation of oil, gas, and water across long distances, as well as in various large-scale industrial applications that require high-pressure and high-volume fluid transport.

Q: What are the benefits of using LASW Line Pipe over other types of pipes?

A: LASW Line Pipe offers higher strength, durability, and resistance to internal and external pressures. Its large diameter allows for greater fluid flow capacity and it can be customized to meet specific project requirements.

Q: What are the dimensions of LASW Line Pipe?

A: LASW Line Pipe is available in various sizes but is typically used for large-diameter applications, usually starting from 16 inches (406.4 mm) and extending to over 100 inches (2540 mm) in diameter.

Q: Can LASW Line Pipe be used in extreme temperatures?

A: Yes, LASW Line Pipe can be designed to withstand extreme temperatures and harsh environmental conditions. The steel grades used in its manufacture can be selected based on the specific temperature and pressure requirements of the application.

Q: What are the testing procedures for LASW Line Pipe?

A: LASW Line Pipe undergoes rigorous testing, including hydrostatic testing, ultrasonic testing, and mechanical property testing to ensure it meets international standards such as API 5L for pipeline transportation systems.

Q: How does the manufacturing process of LASW Line Pipe differ from ERW (Electric Resistance Welded) Pipe?

A: The main difference lies in the welding process. LASW Pipe uses the submerged arc welding process for a stronger weld, while ERW Pipe uses electric resistance welding, which is faster but may result in lower strength welds for large diameters.

Q: What are the coating options for LASW Line Pipe?

A: Various coatings such as fusion-bonded epoxy (FBE), polyurethane, and asphaltic coatings are applied to protect the pipe from corrosion and abrasion, ensuring longevity and integrity in service.

Q: Where can LASW Line Pipe be purchased?

A: LASW Line Pipe is available from specialized steel pipe manufacturers and suppliers that cater to the oil and gas industry, often found through industrial supply directories or oil field equipment providers.

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