1. Classified by molding process

UOE formed LSAW Steel Pipe

Process characteristics: The production process of this steel pipe is to first pre bend the steel plate edge into a U-shape, then press it into an O-shape, and finally weld it. The UOE forming process can produce steel pipes with large diameter and high precision wall thickness. During the molding process, due to precise mold pressing, the roundness of the steel pipe is very good, and the wall thickness uniformity is excellent. For example, in large oil and gas pipelines, UOE formed LSAW steel pipes can effectively withstand high-pressure environments.

Application scenarios: Mainly used for high-pressure, large-diameter oil and gas transmission pipelines, as well as marine engineering structures that require extremely high dimensional accuracy and mechanical performance of steel pipes, such as support columns for deep-sea oil platforms.

JCOE formed LSAW steel pipe

Process characteristics: JCOE molding is a gradual molding method. It involves pre bending the steel plate into a J-shape, then bending it into a C-shape, and finally forming an approximate O-shape before welding. This process has strong flexibility and good adaptability to the size and material of steel plates, and can produce various specifications of steel pipes. Compared with UOE process, JCOE equipment has relatively smaller investment and is suitable for small and medium-sized production.

Application scenario: Widely used in structural pipes in construction engineering, such as frame support structures for large buildings, pile foundations for bridges, etc. It is also used for oil and gas transmission pipelines, especially for projects that require significant changes in pipe diameter and wall thickness.

HME formed LSAW steel pipe

Process features: HME (Core Rod Rolling Method) is formed in a "C C O" manner, using core rod rolling during the forming process to gradually bend the steel plate into a tube shape. The steel pipes produced by this process have good straightness and dimensional accuracy, and can effectively control the stress distribution of the pipe wall.

Application scenarios: Suitable for the field of mechanical processing, such as manufacturing high-precision mechanical structural components and pipelines, as well as automotive chassis and exhaust pipes that require high precision steel pipes in the automotive manufacturing industry.

2. Classified by welding method

Single wire submerged arc welded LSAW steel pipe

Process characteristics: Only one welding wire is used for submerged arc welding during the welding process. This welding method has relatively simple equipment and easy control of welding operations. However, the welding speed is relatively slow, and for the welding of thick walled steel pipes, multiple layers and passes of welding may be required to ensure the quality of the weld seam.

Application scenario: Suitable for the production of LSAW steel pipes with small diameter and thin wall thickness, such as scaffolding pipes in some construction projects, indoor small pipeline systems, etc.

Double wire submerged arc welded LSAW steel pipe

Process features: Two welding wires are used for submerged arc welding simultaneously. Two welding wires can use different parameters such as current, voltage, and welding speed, which can effectively improve the welding speed, and can flexibly adjust the welding parameters according to the requirements of the weld seam, optimizing the quality of the weld seam. For example, the front wire can be used for bottom welding, while the back wire can be used for filling and cover welding, which can improve the penetration and formation of the weld seam.

Application scenario: Commonly used in the production of LSAW steel pipes with medium to large diameters and large wall thicknesses, such as oil and gas pipelines and pipeline systems in large chemical plants, which can meet high welding strength and quality requirements.

Multi wire submerged arc welded LSAW steel pipe (with three or more welding wires)

Process features: Welding is carried out simultaneously with three or more welding wires, further improving the welding speed. This welding method can better control the heat input of the weld, make the structure of the weld more uniform, and improve the mechanical properties. Meanwhile, multi wire submerged arc welding can adapt to thicker pipe wall welding, reduce the number of welding layers, and improve production efficiency.

Application scenario: Mainly used in the production of high-performance LSAW steel pipes with large diameters and thick walls, especially for some occasions that require extremely high weld quality and overall steel pipe performance, such as deep-sea oil and gas transmission pipelines and large offshore wind power infrastructure.

3. Classified by purpose

LSAW steel pipe for oil and gas transportation

Characteristics: This type of steel pipe needs to have good corrosion resistance, as corrosive media may be present in oil and gas; At the same time, it should be able to withstand high pressure to meet the requirements of long-distance transportation. Special anti-corrosion coatings such as three-layer PE coating (polyethylene coating) are generally used, and the strength grade of steel pipes is relatively high, such as X70 and X80 grades in API 5L standard.

Application scenario: Used for onshore and offshore oil and gas pipelines, it is an important pipe material connecting oil and gas fields with refineries, urban gas supply networks, etc.

LSAW steel pipes for building structures

Characteristics: High strength and good toughness are required to withstand various loads of building structures. In construction, this type of steel pipe may be used to make frames, support columns, etc., so there are certain requirements for its dimensional accuracy and appearance quality. Generally, customized production is carried out according to architectural design requirements, such as different combinations of pipe diameter, wall thickness, and length.

Application scenarios: Widely used in high-rise buildings, large sports venues, bridges and other building structures to provide stable support structures for buildings.

LSAW steel pipe for mechanical processing

Characteristics: Need to meet high-precision dimensional requirements, as mechanical parts are very sensitive to dimensional accuracy. At the same time, the mechanical properties of steel pipes should meet the requirements for use after mechanical processing and assembly, such as good wear resistance, fatigue resistance, etc. This type of steel pipe may undergo further mechanical processing, such as turning, drilling, etc.

Application scenarios: Used for manufacturing various mechanical components and pipelines, such as spindle sleeves for machine tools, high-pressure oil pipes for hydraulic systems, etc.

LSAW steel pipe for automobile manufacturing

Characteristics: To meet the strict quality standards of the automotive industry, including high strength, lightweight, and good corrosion resistance. In order to reduce the weight of automobiles, LSAW steel pipes for automobiles may use high-strength alloy steel materials; At the same time, in order to improve the service life of automobiles, anti-corrosion treatment of steel pipes is also very important.

Application scenario: Used for automotive chassis, exhaust system and other parts, providing support for the safe driving and environmental performance of automobiles.