Pipeline Steel Plate
What is a Pipeline Steel Plate?
Pipeline steel plates are used to make large-diameter welded pipes for transporting oil and natural gas. Now more and more people in the world pay attention to protecting our environment, and the new clean energy natural gas is widely used through pipelines. These pipe steel plates have the ability to resist corrosion in high pressure, atmospheric corrosion and low temperature environments. The main steel grades of GNEE Group steel pipe steel plates: API 5L Gr.B X42 X52, etc.
Pipeline steel properties
①High Strength:
Pipeline steel possesses high tensile strength, allowing it to withstand the internal pressure generated during fluid transportation. This property ensures the structural integrity and reliability of the pipeline.
②Toughness:
Pipeline steel is designed to exhibit excellent toughness, which enables it to withstand external forces and resist fractures or failures. This property is crucial for addressing potential impacts, ground movements, and other stressors that pipelines may encounter.
③Corrosion Resistance:
Pipeline steel is formulated with corrosion-resistant alloys or coatings to protect against corrosion. This property helps prevent degradation and extends the service life of the pipeline, especially when transporting corrosive fluids or operating in corrosive environments.
④Ductility:
Pipeline steel exhibits good ductility, enabling it to deform without fracturing under load. This property is important for ensuring that the material can accommodate strain and maintain its integrity, even when subjected to bending or other forms of deformation during installation and operation.
⑤Weldability:
Weldability is a critical property of pipeline steel, as pipelines often require welding for installation and maintenance purposes. Good weldability allows for secure and durable joints, maintaining the overall integrity of the pipeline system.
⑥Low Temperature Performance:
Pipeline steel may need to operate in low-temperature environments, especially in cold regions or when transporting cryogenic fluids. Specialized grades of pipeline steel are designed to remain ductile and resist brittle fracture even at extremely low temperatures.
Grade、Specification、Delivery Status
| Product Standard | Grades | Thickness Range（mm) | Delivery Status |
|---|---|---|---|
| API Spec5L/ISO3183 | L245 or Gr.B | ≤40 | CR |
| L290 or X42 | ≤40 | CR | |
| L320 or X46 | ≤40 | CR | |
| L360 or X52 | ≤40 | CR/TMCP | |
| L390 or X56 | ≤40 | CR/TMCP | |
| L415 or X60 | ≤40 | CR/TMCP | |
| L450 or X65 | ≤40 | TMCP | |
| L485 or X70 | ≤40 | TMCP | |
| L555 or X80 | ≤35 | TMCP | |
| L625 or X90 | ≤30 | TMCP | |
| L690 or X100 | ≤30 | TMCP | |
| L830 or X120 | ≤25 | TMCP | |
| GB9711 | L245 | ≤40 | CR |
| L290 | ≤40 | CR | |
| L360 | ≤40 | CR/TMCP | |
| L415 | ≤40 | CR/TMCP | |
| L450 | ≤40 | TMCP | |
| L485 | ≤40 | TMCP | |
| L555 | ≤35 | TMCP | |
| DNV-OS-F101 | 245 | ≤40 | CR |
| 290 | ≤40 | CR | |
| 360 | ≤40 | CR/TMCP | |
| 415 | ≤40 | CR/TMCP | |
| 450 | ≤40 | TMCP | |
| 485 | ≤40 | TMCP | |
| 555 | ≤35 | TMCP |
What is the scope of use of pipeline steel plate?
Oil and Gas Pipelines: Pipeline steel is extensively utilized in the construction of long-distance pipelines for the transportation of crude oil, natural gas, and refined petroleum products. These pipelines can span hundreds or even thousands of kilometers, connecting production areas to refineries and distribution networks.
Gathering and Distribution Lines: Pipeline steel is employed in gathering systems that collect oil and gas from multiple wells and transport them to central processing facilities. It is also used in distribution lines that deliver gas from transmission pipelines to end-users, such as residential, commercial, and industrial customers.
Offshore Pipelines: In offshore environments, pipeline steel is crucial for subsea pipelines that transport oil and gas from offshore drilling platforms to onshore facilities or other offshore installations. These pipelines must withstand harsh conditions, including high pressures, corrosive seawater, and dynamic loads.
Water and Wastewater Pipelines: Pipeline steel is also employed in water and wastewater infrastructure, including water supply pipelines, sewer lines, and stormwater drainage systems. These pipelines ensure the efficient and reliable transport of water resources for municipal, industrial, and agricultural purposes.
Petrochemical Plants: Within petrochemical facilities, pipeline steel is used in the construction of process piping systems that transport various chemicals, gases, and liquids for refining and manufacturing purposes. These pipelines carry feedstocks, intermediates, and final products throughout the plant.
Petroleum Pipeline Steel Plate
Performance Requirements for Pipeline Steels
high strength
Pipeline steel strength indicators are mainly tensile strength and yield strength. In the requirements of high strength at the same time, the pipeline steel yield strength ratio (yield strength and tensile strength ratio) also puts forward the requirements, generally required in the range of 0.85 ~ 0.93.
High impact toughness
Pipeline steel requires that the material should have sufficiently high impact toughness (crack initiation and crack stopping toughness). For the parent material, when the toughness value of the material meets the requirements for crack stopping, its toughness can also generally meet the requirements for preventing crack initiation.
Low brittle transition temperature
Harsh geographical and climatic conditions require that pipeline steels should have a sufficiently low tough-brittle transition temperature. General specifications require that the fracture shear area of a specimen at the lowest operating temperature F be not less than 85%.
Corrosion cracking resistance
Pipeline steels should have excellent resistance to hydrogen-induced cracking (HIC) and sulfide stress corrosion cracking (SSCC).
Basic process for the production of pipeline steel
The basic process of domestic pipeline steel production are: conventional semi-continuous hot rolling, CSP continuous casting and rolling, plate unit, furnace coil unit.
Semi-continuous rolling mill：
In a semi-continuous mill, the hot rolling experienced by the strip in the finishing passes is substantially constant from one end of the strip to the other. In the finishing mill to between the time is usually less than 3s.
CSP continuous casting and rolling：
In the CSP production line containing niobium, vanadium, titanium composite microalloyed low carbon manganese steel, the use of suitable controlled rolling and cooling and coiling process, can ensure that the mechanical properties and microstructure of the steel in line with the requirements of the technical aspects of the modern X60 pipeline steel, in line with the new trend of the development of modern pipeline steel. The process is characterized by continuous casting of thin slabs with central segregation, eliminating the central segregation of continuous casting of thin slabs is a key technical issue to further improve the quality of pipeline steel.
Medium Thickness Plate Unit：
It mainly produces wide and thick plates for the production of LSAW pipes, which are of reliable quality and widely used in the main lines for high-pressure transportation of oil and gas.
Furnace Rolling Mill：
Two hot coil rolling mills are installed on conveyor lines on either side of the finishing mill. The output rolls usually include a laminar flow cooling system and a coiling station. In the furnace coil mill, the strip throughout the length of the thermo-mechanical history of the obvious changes, especially in the production of micro-alloyed steel, will strongly affect the degree of recrystallization produced in the finishing mill, grain growth and precipitation, and lead to the entire length of the strip of the ultimate microstructure and properties of the drastic changes. The process is characterized by relatively low investment costs.
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Regular Inspections
Regularly inspect the surface of the shipbuilding steel plate to detect any signs of corrosion or damage. Check for any rust, scratches, dents or cracks that could compromise the integrity of the steel.
Cleaning
Keep pipeline steel sheets clean and dry to prevent rusting. It must be cleaned regularly to remove dirt, salt and debris that can lead to oxidation and corrosion.
Coating
Coating is another effective way to protect steel plates from rust and corrosion. The coating is a barrier between the steel plate and the environment.
Our Factory
We have established long-term cooperation with dozens of domestic factories such as Baosteel, Wuhan Iron & Steel, Anshan Iron & Steel, Maanshan Iron & Steel, etc. to ensure that our products are produced with high-quality materials and synchronized with various international standards, with an annual export volume of more than 80,000 tons.GNEE Group is committed to becoming the world's most internationally competitive supply chain group, to meet the different needs of different customers, and to truly realize: one-stop service, making the choice simpler.
FAQ
Q:What is Foreign Trade-Express?
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A: Foreign Trade Express is a one-stop intelligent foreign trade network marketing SaaS system platform.
Domestic commonly used pipeline steel seamless steel pipe material is mainly?
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GR.B X42 X46 X52 X56 X60 PSL1 PSL2
What is the chemical composition of pipeline steel?
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C: 0.1~0.25%, Mn: 0.4~0.7%, Si: 0.1~0.5%, certain S, P content and residual other elements.
What are the characteristics of pipeline steel?
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High strength, high impact toughness, low ductile-brittle transition temperature, excellent resistance to hydrogen-induced cracking (HIC) and sulfide stress corrosion cracking (SSCC), and good welding performance.