1. Classified by molding method

External controlled spiral forming SSAW Steel Pipe

Forming characteristics: This forming method mainly controls the spiral curling process of the strip steel through external forming molds or rollers. During the forming process, the strip steel is fed from one side and gradually spirals up around a central axis under the action of an external forming device to form a billet. The external forming device can accurately control the curling angle and speed of the strip steel, resulting in high forming accuracy of the tube blank.

Application scenarios: It is widely used in the construction of oil and gas pipelines, especially in situations where high precision is required for pipe diameter, such as long-distance high-pressure oil pipelines.

Internal control spiral forming SSAW steel pipe

Forming characteristics: When forming by internal control method, it mainly relies on the internal core rod or support structure to guide the spiral curling of the strip steel. The strip steel spirals up around the core rod, and the bending degree and forming shape of the strip steel are adjusted through an internal control mechanism. This method can better control the inner diameter size of the steel pipe, resulting in higher dimensional accuracy inside the steel pipe.

Application scenario: It is commonly used to make pipelines with special requirements for inner diameter accuracy, such as material conveying pipelines in chemical plants. When conveying media that are sensitive to flow and pressure, accurate inner diameter dimensions can ensure stable transportation of the medium.

2. Classified by welding process

Single wire submerged arc welded SSAW steel pipe

Welding characteristics: Only one welding wire is used for submerged arc welding during the welding process. During welding, the welding wire generates an arc under the flux layer, causing the edges of the strip steel to melt and fuse together to form a weld seam. Single wire submerged arc welding equipment is relatively simple and easy to control, but the welding speed is relatively slow. For 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 small-diameter and thin-walled spiral seam submerged arc welded steel pipes, such as small water supply and drainage pipes, ventilation pipes, etc. in construction projects.

Double wire submerged arc welded SSAW steel pipe

Welding characteristics: Two welding wires are used for submerged arc welding simultaneously. Two welding wires can be set with different welding parameters, such as current, voltage, and welding speed. Double wire submerged arc welding can significantly improve welding speed and flexibly adjust welding parameters according to different 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 is used for filling and cover welding, resulting in better penetration and formation of the weld seam.

Application scenario: Commonly used in the production of spiral seam submerged arc welded steel pipes with medium to large diameters and moderate wall thickness, it is widely used in fields such as oil and gas pipelines and urban heating pipelines.

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

Welding characteristics: Using three or more welding wires to weld simultaneously further improves 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 for the production of high-performance spiral seam submerged arc welded steel pipes with large diameters and thick walls, such as deep-sea oil and gas pipelines, high-temperature and high-pressure pipelines in large chemical plants, etc.

3. Classified by purpose

SSAW steel pipes for oil and gas transportation

Performance characteristics: SSAW steel pipes used for oil and gas transportation need to have good corrosion resistance, as oil and gas may contain corrosive components. At the same time, it is necessary to be able to withstand high pressure to ensure the safe and stable transportation of oil and gas in pipelines. Usually, anti-corrosion coatings such as three-layer PE coating (polyethylene coating) are used to enhance the corrosion resistance of steel pipes. Its strength level is also relatively high, in line with relevant oil and gas transportation standards, such as API 5L standard.

Application scenario: Widely used in onshore and offshore oil and gas pipeline systems, it is an important pipe material that connects oil and gas fields with refineries, urban gas supply networks, etc.

SSAW steel pipes for urban water supply and drainage

Performance characteristics: This type of steel pipe is mainly used in urban water supply and drainage systems, and has certain requirements for corrosion resistance, especially for steel pipes used in sewage discharge, which need to resist the corrosion of chemical substances in sewage. It has good sealing performance to prevent leakage of water resources or sewage. There are various specifications for pipe diameter and wall thickness, which can meet different water supply and drainage flow requirements.

Application scenarios: Widely used in urban water supply pipelines, rainwater discharge pipelines, sewage collection and transportation pipelines, etc.

SSAW steel pipes for building structures

Performance characteristics: It is required to have high strength and good toughness to withstand various loads in the building structure, such as self weight, wind load, earthquake load, etc. The dimensional accuracy and appearance quality of steel pipes are also important, as they can affect the overall aesthetics and stability of the building structure. Usually customized production is carried out according to architectural design requirements, including different combinations of pipe diameter, wall thickness, and length.

Application scenarios: Widely used in the framework, support columns, trusses and other parts of high-rise buildings, large bridges, sports venues and other building structures.

SSAW steel pipe for chemical industry

Performance characteristics: Pipelines in the chemical industry need to be able to resist corrosion from various chemical media, so SSAW steel pipes used in the chemical industry may use special alloy materials or anti-corrosion coatings. At the same time, in order to meet the special working conditions such as high temperature, high pressure, and high flow rate in the chemical production process, the mechanical properties and sealing of steel pipes must meet high standards.

Application scenario: Used in chemical equipment to transport various chemical raw materials, intermediates, and products, such as acid-base solutions, organic solvents, gases, etc.