Seamless pipes are derived from solid steel that is in sheet or bar form and is formed into a solid round shape known as “billets” which are then heated and cast over a form such as a piercing rod to create a hollow tube or shell. From: Reliability and Maintainability of In-Service Pipelines.
Carbon steel, also known as carbon steel, is an iron carbon alloy with an internal carbon content of nearly 2%. In addition to carbon, carbon steel contains many other elements, such as manganese, sulfur, or silicon. Generally speaking, the higher the amount of carbon contained in carbon steel, the greater its hardness, the higher the strength will be produced. Just note that the higher the carbon content, the lower the plasticity.

API 5L Seamless Line pipe is a seamless steel pipe that is manufactured without welded joints and therefore has higher strength and corrosion resistance. This steel pipe is made of high carbon steel or alloy steel, after heat treatment and processing, has excellent mechanical properties and high temperature, high pressure, corrosion resistance. API 5L Seamless Line pipe is mainly used for long-distance transmission of oil and gas, such as oil and gas, and can also be used in the manufacture of high pressure equipment and pipelines.

SSAW Steel Pipe, full name Spiral Submerged Arc Welded Steel Pipe, Chinese name spiral submerged arc welded steel pipe. This is a spiral seam steel pipe produced by double-sided submerged arc welding process. In the welding process, the welding current passes through the welding pool, reacts with the metal in the welding pool, forms the slag and fills the weld, thus completing the welding of the steel pipe. Due to the submerged arc welding process, SSAW Steel Pipe has high welding quality and stability, and is widely used in the oil, natural gas, chemical industry, electric power and other fields of pipeline and pressure vessel manufacturing.

Carbon steel welded pipe refers to the steel pipe made of carbon steel pipe by welding process.

Carbon steel welded pipe has the following characteristics:
Various materials: carbon steel welded pipe is mainly made of carbon steel, but it can also be made of other materials, such as stainless steel, alloy steel, etc.
Simple manufacturing process: The manufacturing process of carbon steel welded pipe is relatively simple, and it can be made by welding process after forming the roll plate of steel plate or steel strip.
Wide range of application: carbon steel welded pipe can be used in many fields, such as construction, machinery, oil, natural gas, chemical and other fields.
With strong corrosion resistance: carbon steel welded pipe is made of high-quality carbon steel materials and welding technology, which has strong corrosion resistance.
Excellent mechanical properties: carbon steel welded pipe has high strength, hardness and corrosion resistance, and can be used in the manufacture of various mechanical parts.

A36 carbon steel pipe is a carbon structural steel pipe, its implementation standard is ASTM A36/A36M-03a, and China's Q235 ordinary carbon structural steel corresponding. A36 carbon steel pipe has good comprehensive properties, including strength, plasticity, toughness and weldability, so it is widely used in various structural and engineering fields.

Specifically, the A36 carbon steel pipe has a tensile strength of 400-550 MPa and a yield strength of 250 MPa, which has good bearing capacity and stability. At the same time, it also has good plasticity and toughness, can be formed by heat treatment, cold processing and other ways, can also easily welding, cutting and bending and other processing operations. In addition, the A36 carbon steel pipe also has good corrosion resistance, and has a certain resistance to most common corrosive media.

Due to the above characteristics, A36 carbon steel pipe is widely used in construction engineering, manufacturing, bridge construction, shipbuilding, petroleum, chemical and other fields. For example, it can be used in the manufacture of beams, columns, frames and other parts in building structures, and can also be used to manufacture various mechanical parts, such as shafts, wheels and so on. In bridge construction, the high strength and corrosion resistance of A36 carbon steel pipes make them an ideal choice. At the same time, it can also be used in the hull, keel and other parts of ship construction, as well as equipment and pipeline manufacturing in petroleum, chemical and other fields.

It should be noted that the specific chemical composition, mechanical properties and application areas of A36 carbon steel tubes may vary depending on the manufacturer and market demand. Therefore, in the selection and use of A36 carbon steel pipe, it is necessary to make a reasonable choice according to the specific application environment and requirements. At the same time, due to the limited strength and corrosion resistance of the A36 carbon steel pipe, it may not be suitable for some special environments and use cases. In this case, it is necessary to consider the use of higher performance materials to meet specific requirements.

The above information is for reference only, if necessary, it is recommended to consult professional engineers or material experts.

Carbon steel square pipe is a square section of steel pipe, mainly composed of carbon, manganese, silicon, phosphorus, sulfur and other elements. Carbon steel square pipe has good plasticity and mechanical properties, while having high strength and compressive properties, so it is widely used in many fields, including building structures, machinery manufacturing, highway facilities, bridge pipelines and so on. In the field of construction, carbon steel square pipes are often used to construct and strengthen the structure of buildings, such as building frames, support columns, stair railings, railings, etc., to improve the safety and stability of buildings. In the field of mechanical manufacturing, carbon steel square pipes can be used to manufacture various mechanical equipment and parts, such as conveying equipment, transmission shafts, cooling pipes, mechanical structures, etc.

In addition, the material report of carbon steel square pipe usually includes information on both chemical composition and mechanical properties. Chemical composition mainly includes the content of carbon, silicon, manganese, phosphorus, sulfur and other elements, the content of these elements will directly affect the mechanical properties and plasticity of steel. Mechanical properties refer to the performance of the material under mechanical action, including tensile strength, yield strength, elongation, etc., which is a key indicator to measure the quality of carbon steel square pipe.

The volume calculation formula of carbon steel square pipe is: volume = length × width × height, that is, V = lwh.

Please note that the specific chemical composition, mechanical properties and application areas may vary depending on the manufacturer and market needs. Therefore, in the selection and use of carbon steel square pipe, it is necessary to make a reasonable choice according to the specific application environment and requirements.

Carbon steel pipe is a tubular material made of carbon steel, mainly used to transport fluids, gases or as structural support. The raw material of carbon steel pipe is steel ingot or solid round steel, which is made by perforation, hot rolling, cold rolling or cold drawing process.

Carbon steel pipe has a variety of excellent characteristics, such as high strength, good corrosion resistance, high temperature and low temperature resistance, light weight, good processability and high economy. These characteristics make carbon steel pipes widely used in various fields, such as construction, machinery, petrochemical and so on. In the field of construction, carbon steel pipes are often used in stair handrails, ground paving, electrical lines, hot water supply pipes, etc. In the mechanical field, carbon steel pipes are used to manufacture various mechanical structures and components; In the petrochemical industry, carbon steel pipes are used to transport oil and gas and chemical substances.

The classification of carbon steel pipes includes two categories: hot rolled carbon steel pipes and cold rolled (drawn) carbon steel pipes. Hot rolled carbon steel pipe can also be divided into general steel pipe, low and medium pressure boiler steel pipe, high pressure boiler steel pipe, alloy steel pipe, stainless steel pipe, petroleum cracking pipe, geological steel pipe, etc. The cold-rolled (drawn) carbon steel pipe includes carbon thin-wall steel pipe, alloy thin-wall steel pipe, stainless thin-wall steel pipe, shaped steel pipe and so on.

The production process of carbon steel pipe mainly includes raw material preparation, heating, perforation, drawing, pickling and rust removal, cold drawing or cold drawing, heat treatment, further processing, testing, packaging and delivery steps.

It should be noted that the specific specifications, performance parameters and application recommendations of carbon steel pipes should be selected according to the specific application environment and requirements. At the same time, when using carbon steel pipes, the relevant safety specifications and instructions should be followed to ensure that they work safely and effectively.