Due to their versatility and high strength-to-weight ratio, S235 Steel Pipe is a popular choice for structural steel applications. In order to select the appropriate product for their projects, engineers, contractors, and procurement professionals need to be familiar with the dimensions and specifications of S235 steel pipes. In this comprehensive guide, we will investigate the S235 steel pipe dimension standards, common dimensions and specifications, and industry-standard measurement methods.
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S235 Steel Pipe Dimension Standards
Pipes made of S235 steel are produced in accordance with specific standards that guarantee quality and consistency across the industry. EN 10210, a European standard for hot-finished structural hollow sections, is the primary standard for S235 steel pipes. The dimensions, tolerances, and mechanical properties of S235 steel pipes are all detailed in this standard.
S235 steel pipes, categorized under EN 10210, come in grades like S235JRH, S235J0H, and S235J2H. Despite variances in chemical makeup and mechanical attributes, these grades adhere to unified dimensional criteria, ensuring interchangeability across manufacturers for diverse applications. S235JRH, for instance, is a non-alloy structural steel known for its formability, weldability, and strength, making it ideal for construction and engineering. It boasts a minimum yield strength of 235 MPa and tensile strength ranging from 360-510 MPa. The 'J' in its grade signifies its impact resistance, with 'R' indicating room temperature impact testing. While not specifically designed for corrosion resistance, S235JRH offers some protection against atmospheric corrosion due to its copper content. However, it may require additional coatings or treatments for more aggressive environments. Its widespread use in structures, machinery, and vehicles underscores its reliability and versatility in the industry.
Tolerances for various dimensional aspects of S235 Steel Pipe are specified in the EN 10210 standard, including:
Outside diameter Wall thickness Length Straightness End squareness Manufacturers like Longma Group ensure that their S235 steel pipes meet the stringent requirements of the engineering and construction industries by adhering to these standards.
Common Dimensions and Specifications of S235 Steel Pipes
S235 steel pipes come in many different sizes to fit a variety of applications. The most prevalent dimensions include:
Outside Dimensions: Wall Thickness: ranging from 21.3 mm to 610 mm Usually between 40 and 2.0 mm in length: Typically, standard lengths are 6 meters or 12 meters, but custom lengths are also available. The selection of dimensions is determined by the project's specific requirements. Pipes with a smaller diameter, for instance, might be used in handrails or light structural applications, while pipes with a larger diameter are frequently used in pipeline systems or heavy-duty structural supports.
S235 Steel Pipe is also distinguished by its mechanical properties in addition to its dimensions. Some important requirements include:
Retain Strength: Minimum Tensile Strength of 235 MPa: Elongation: 360-510 MPa Minimum Impact Strength of 24%: varies with the grade, such as S235JRH, S235J0H, and S235J2H. Because of these mechanical properties, S235 steel pipes are suitable for a wide range of applications, including those in the oil and gas industry and more specialized ones.
S235 Steel Pipe Dimension Measurement Methods
It is essential to accurately measure the dimensions of S235 steel pipe for quality control and industry standard compliance. S235 Steel Pipe can be measured in a variety of ways using a variety of tools and methods:
The measurement of the outside diameter of steel pipes, such as S235, is crucial for ensuring they meet the required specifications for various applications. Typically, a micrometer or caliper is used for precise measurement of smaller diameters. These tools provide accurate readings by directly contacting the surface of the pipe. For larger pipes, a pi tape is a more suitable option. A pi tape is a flexible measuring tape that wraps around the circumference of the pipe. It is designed with special graduations that convert the measured circumference into a direct diameter reading. This method is not only convenient but also efficient, especially for pipes with larger diameters where using a micrometer or caliper would be impractical.
When using a micrometer, it's important to ensure that the measuring faces are clean and free of debris. The object is placed against the anvil and the spindle is tightened until it makes firm contact with the object's surface. The reading is then taken from the thimble and sleeve, with the additional measurement from the vernier if necessary.
Pi tapes, on the other hand, are simple to use. After cleaning the tape and the part to be measured, a snug pull of approximately 2.25kg of tension is applied to the tape. The reading is taken directly from the tape, which is calibrated to provide the diameter measurement based on the circumference.
Both methods are accurate and reliable, but the choice between using a micrometer or caliper versus a pi tape depends on the size of the pipe and the required measurement precision. Regardless of the method, proper calibration and maintenance of the measuring tools are essential to ensure continued accuracy.
How thick the wall is: Usually measured with an ultrasonic thickness gauge, which doesn't hurt the pipe and uses sound waves to measure the thickness of the wall.
Measurement of Length: for longer pipes, typically measured with a laser distance meter or tape measure.
Measuring the Straightness: can be evaluated with laser alignment tools or a straight edge for more precise measurements.
End symmetry: Usually measured with a combination square or special gauges made for inspecting pipe ends.
It is essential to keep in mind that these measurements must be taken at multiple locations along the pipe to guarantee consistency and compliance with EN 10210's tolerances.
To assess the quality and dimensional accuracy of their S235 steel pipes, many manufacturers, including Longma Group, use advanced non-destructive testing techniques in addition to physical measurements. Some examples include:
Using these measurement and testing methods, manufacturers can ensure that their S235 steel pipes meet the stringent requirements of international standards and customer specifications. Eddy current testing for surface defects. Ultrasonic testing for internal defects. X-ray inspection for comprehensive quality assurance.
Contact Longma Group
In conclusion, working with these adaptable structural components necessitates an understanding of the dimensions, standards, and measurement techniques of S235 Steel Pipe. This knowledge will assist you in making informed decisions and ensuring the success of your projects, whether you are an engineer creating a new structure or a procurement specialist sourcing materials.
Assuming you're searching for excellent S235 steel pipes that fulfill worldwide guidelines, consider connecting with Longma Gathering. They are able to provide the ideal solution for your requirements due to their expertise in producing pipes of the grades S235JRH, S235J0H, and S235J2H in accordance with EN10210. To learn more about their S235 steel pipe offerings and how they can support your next project, contact them at info@longma-group.com.
