Common SSAW Steel Pipe standards include GB/T 9711, API Spec 5L, ISO 3183-3, and SY/T 5037. The following are the raw material requirements for steel pipes under these standards:

GB/T 9711： This is the standard for steel pipes used in the transportation of petroleum and natural gas industries in China.

Chemical composition: There are clear restrictions on conventional elements such as carbon (C), manganese (Mn), silicon (Si), phosphorus (P), and sulfur (S). At the same time, according to different steel grades and usage environments, there are corresponding requirements for the content of alloy elements such as chromium (Cr), nickel (Ni), molybdenum (Mo), niobium (Nb), and vanadium (V). For example, for X70 steel grade, the carbon content generally does not exceed 0.10%, the manganese content is around 1.50-1.70%, and it also contains appropriate amounts of microalloying elements such as niobium, vanadium, and titanium to improve the strength and toughness of the steel.

Mechanical properties: Steel pipes are required to have high yield strength, tensile strength, elongation, and good toughness. The minimum yield strength of X80 steel grade is 555MPa, the tensile strength is between 625-760MPa, and the elongation at break is not less than 18%. At the same time, there are strict regulations on the low-temperature toughness of steel pipes according to different usage environments, usually requiring the impact energy to reach a certain value under specific low-temperature conditions.

API Spec 5L： This is a standard developed by the American Petroleum Institute for oil and gas pipelines, which is widely adopted internationally.

Chemical composition: There are various steel grades ranging from A25 to X100, and the chemical composition of different steel grades varies. Generally speaking, as the steel grade increases, the carbon content gradually decreases, while the content of manganese and other alloying elements increases accordingly. For example, the carbon content of X65 steel grade usually does not exceed 0.12%, the manganese content is between 1.30% and 1.60%, and it contains small amounts of niobium, vanadium, titanium and other elements to optimize the structure and properties of the steel.

Mechanical properties: Similar to the GB/T 9711 standard, corresponding yield strength, tensile strength, and elongation requirements are specified for steel pipes of different grades. For example, the minimum yield strength of X52 steel grade is 359MPa, the tensile strength is not less than 462MPa, and the elongation varies depending on the pipe diameter and wall thickness, but generally requires not less than 22%. In addition, for steel pipes used in special environments such as acidic environments, they also need to meet the performance requirements of sulfide stress cracking (SSC) and stress corrosion cracking (SCC) resistance.

ISO 3183-3： This is a part of the steel pipe standard for the petroleum and natural gas industry developed by the International Organization for Standardization, mainly for submerged arc welded steel pipes.

Chemical composition: The chemical composition requirements for steel pipe raw materials are similar to those of GB/T 9711 and API Spec 5L standards, with emphasis on controlling carbon equivalent to ensure the welding and mechanical properties of the steel pipe. For example, for high-strength steel grades, carbon content will be strictly limited and the strength and toughness of the steel will be improved by adding alloying elements.

Mechanical properties: It is stipulated that steel pipes should have sufficient strength, toughness, and fatigue resistance. Under different usage environments and working conditions, there are clear requirements for the mechanical performance indicators of steel pipes. For example, in special environments such as high temperature, high pressure, or low temperature, the yield strength, tensile strength, and impact toughness of steel pipes need to meet corresponding standard values.

SY/T 5037： This is the standard for spiral submerged arc welded steel pipes used in low-pressure liquid transportation pipelines in China.

Chemical composition: The requirements for the chemical composition of raw materials are relatively low, mainly used for ordinary fluid transportation pipelines. Generally, it is required that the content of elements such as carbon, manganese, and silicon be within a certain range to ensure the basic performance of the steel pipe. For example, common steel grades such as Q235, Q345, etc. typically have a carbon content between 0.12% and 0.22% and a manganese content between 0.30% and 1.60%.

Mechanical properties: Steel pipes are required to have certain strength and toughness to meet the requirements of low-pressure liquid transportation. For example, the yield strength of Q235 steel grade is not less than 235MPa, the tensile strength is between 370-500MPa, and the elongation is not less than 26%. For Q345 steel grade, the yield strength shall not be less than 345MPa, the tensile strength shall be between 470-630MPa, and the elongation shall not be less than 21%.

It should be noted that the raw material requirements for steel pipes under different standards may vary due to specific usage environments, engineering requirements, and other factors. In actual production and application, it is necessary to select appropriate standards and steel pipe raw materials according to specific situations to ensure that the quality and performance of steel pipes meet engineering requirements.