Customization:	Available
After-sales Service:	Honor Integrity, Take Service as a Pride.
Warranty:	1 Years

Specification	Details
Standard	ASTM A53 / ASME SA53
Grade	Grade B
Outer Diameter Range	Typically 6 - 610 mm (can be customized for special sizes)
Wall Thickness Range	1.65 - 50.8 mm
Pipe Length	Usually 4 - 12 m, with some manufacturers offering longer lengths upon request

Property	Value
Yield Strength	≥ 241 MPa
Tensile Strength	415 - 550 MPa
Elongation	≥ 21%
Impact Resistance	Good impact resistance at normal temperatures. Can be further improved through heat treatment processes.

Process Step	Description
Billet Preparation	High - quality steel billets are selected. These billets are usually made from continuously cast steel, ensuring uniform chemical composition and structure.
Piercing	The billet is heated to a suitable temperature (around 1100 - 1250°C) and then pierced using a piercing mill. A mandrel is inserted into the heated billet, which is rotated and pushed through a set of rolls, forming a hollow tube.
Rolling	The pierced tube is further processed through a series of rolling mills. This process refines the grain structure, improves the dimensional accuracy, and enhances the mechanical properties of the pipe. Different types of rolling mills, such as stretch - reducing mills or mandrel mills, can be used depending on the final product requirements.
Heat Treatment	To optimize the mechanical properties, the seamless pipe may undergo heat treatment processes such as annealing, normalizing, or quenching and tempering. Annealing is often used to relieve internal stresses, improve ductility, and enhance the overall quality of the pipe.

Environment	Performance
General Industrial Atmosphere	Exhibits good corrosion resistance due to the formation of a natural oxide layer on the surface. However, over time, in the presence of moisture and certain contaminants, corrosion may still occur.
Mildly Corrosive Media	Can resist corrosion in slightly acidic or alkaline solutions for a certain period. But for highly corrosive media, additional corrosion - protection measures like applying anti - corrosion coatings or using inhibitors are necessary.

Industry	Applications
Oil and Gas	- Used for the transportation of oil, gas, and refined products in both onshore and offshore pipelines. Its seamless structure reduces the risk of leakage, making it suitable for long - distance and high - pressure transportation. - In refineries and petrochemical plants, it is used in piping systems for various processes, such as distillation, cracking, and chemical reactions.
Power Generation	- Steam pipelines in thermal power plants, where it can withstand high - temperature and high - pressure steam. The seamless nature of the pipe ensures reliable operation under extreme conditions. - Cooling water pipes in power plants, as it can handle the continuous flow of water without significant corrosion issues.
Mechanical Engineering	- As hydraulic pipes in machinery, where it needs to withstand high - pressure fluids. The seamless construction provides better pressure - bearing capacity and durability. - In manufacturing equipment, it can be used for conveying various fluids and gases within the production process.
Automotive Industry	- In some automotive applications, such as for fuel lines or hydraulic brake lines in heavy - duty vehicles. The high strength and reliability of seamless pipes are crucial for ensuring safe and efficient operation.

Control Measure	Description
Raw Material Inspection	Stringent inspection of the incoming steel billets. Chemical composition analysis is carried out to ensure compliance with A53 Gr.B standards. Mechanical property tests, such as tensile and impact tests, are also conducted on sample pieces from the billets.
In - process Monitoring	During the manufacturing process, continuous monitoring of key parameters such as temperature, rolling forces, and dimensional accuracy is performed. Non - destructive testing methods, like ultrasonic testing, are used at intermediate stages to detect any potential internal defects.
Final Product Testing	After manufacturing, the seamless pipes undergo a series of comprehensive tests. Hydrostatic testing is carried out to check the pressure - bearing capacity of the pipes. Non - destructive testing methods, including radiographic testing and magnetic particle testing, are used to detect any surface or internal defects. Tensile, bending, and hardness tests are also conducted to verify the mechanical properties of the final product. Products must meet all relevant international standards, and may obtain certifications such as ISO 9001 and API (American Petroleum Institute) certifications.

Advantage	Explanation
High Strength and Pressure - Resistance	The seamless manufacturing process results in a uniform and dense structure, giving the pipe excellent strength. It can withstand high internal pressures, making it ideal for applications in high - pressure systems, such as oil and gas pipelines and power plant steam lines.
Leak - Resistant	Without weld seams, the risk of leakage is significantly reduced. This is crucial in applications where the transported media are hazardous or valuable, ensuring the integrity of the pipeline system and preventing environmental pollution or product loss.
Good Fatigue Resistance	Seamless pipes generally have better fatigue resistance compared to welded pipes. They can withstand repeated cyclic loading without developing cracks or failures as quickly, making them suitable for applications where the pipes are subjected to fluctuating pressures, such as in some mechanical engineering and automotive applications.
Superior Dimensional Accuracy	The rolling and finishing processes in seamless pipe manufacturing can achieve high - level dimensional accuracy. This allows for easier installation and connection in complex piping systems, reducing the need for extensive on - site adjustments.

Seamless Carbon Steel A53 Gr. B Pipe in Oil & Gas Transportation

Basic Info.