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.

Carbon steel pipe is a kind of steel pipe with carbon as the main alloying element, which is widely used in various fields.

The manufacturing process of carbon steel pipe consists of the following steps: First, the ingot or solid round steel is perforated to make the tube, and then the process is processed by hot rolling, cold rolling or cold drawing, and finally the carbon steel pipe is made. The outer surface of the steel pipe is very smooth, high dimensional accuracy, good mechanical properties, and has strong compressive and tensile resistance.

According to the different materials and manufacturing processes, carbon steel pipes can be divided into seamless steel pipes and welded steel pipes. Seamless steel pipe is made by forging or rolling process, its internal and external surfaces are smooth, high dimensional accuracy, generally used in high-precision mechanical components, hydraulic equipment, auto parts and other fields. Welded steel pipe is formed by the roll plate of steel plate or steel strip, and is made by welding process, which is generally used for oil, natural gas, water and other transportation pipelines, building structures and various mechanical parts.

Carbon steel pipes have a wide range of applications, such as construction, machinery, oil, natural gas, chemical and other fields. For example, in the field of construction, carbon steel pipes can be used to make large components such as Bridges and building structures; In the field of machinery, it can be used to make various mechanical parts and tools; In the field of oil and gas, it can be used to make transportation pipelines and supports; In the chemical industry, it can be used to make reactors, pipes and valves.

In short, carbon steel pipe is a kind of metal material with high strength, hardness and corrosion resistance, which is widely used in various fields, bringing convenience and development to people's life and production.

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.

Carbon steel square pipe is a kind of carbon steel pipe with square cross-section shape.

Carbon steel square pipe is made of high-quality carbon steel, has good mechanical properties and strength, and toughness and corrosion resistance. Its characteristics are as follows:

High strength: Carbon steel square tubes are made of strong carbon steel with excellent mechanical properties and strong compression resistance.
Corrosion resistance: After special treatment, carbon steel square pipe has strong corrosion resistance.
Easy to process: carbon steel square pipe is easy to cut, drill and weld and other processing operations.