The size terms of steel pipes (such as seamless pipe) typically refer to various dimensions and parameters that define the characteristics of the pipe. The main size terms for steel pipes are as follows:
1. Nominal Pipe Size (NPS): NPS is a standard size designation used to refer to the approximate internal diameter of the pipe. It is expressed in inches and is commonly used in North America. For example, NPS 4 means the pipe has an approximate internal diameter of 4 inches.
2. Outside Diameter (OD): The outside diameter of a steel pipe refers to the measurement of the entire external circumference of the pipe. It is usually specified in inches or millimeters.
3. Wall Thickness: Wall thickness refers to the thickness of the pipe's wall. It is essential for determining the strength and pressure-handling capabilities of the pipe. It is also specified in inches or millimeters.
4. Schedule: The schedule of a steel pipe indicates its wall thickness in relation to its nominal size. Standard pipe schedules include numbers such as SCH 5, SCH 10, SCH 40, SCH 80, and so on. Higher schedule numbers correspond to thicker walls.
5. Pipe Length: The length of steel pipes is usually specified in standard increments, such as 20 feet (6.1 meters) or 40 feet (12.2 meters). Custom lengths can also be requested.
6. Weight per Unit Length: This term refers to the weight of the steel pipe per unit length (e.g., weight per foot or weight per meter). It is important for transportation and installation purposes.
7. Inner Diameter (ID): The inner diameter is the actual diameter of the hollow space inside the steel pipe. It is calculated by subtracting twice the wall thickness from the outside diameter.
8. Cross-Sectional Shape: Steel pipes come in various cross-sectional shapes, with the most common being circular. However, they can also be square, rectangular, or other specialized shapes.
9. End Connections: The end connections of steel pipes refer to the type of fittings or joints used to connect the pipes to each other or to other components in the system. Common end connections include plain ends, threaded ends, and flanged ends.
10. Material Grade: Steel pipes are available in different material grades, such as carbon steel, stainless steel, and alloy steel. The material grade affects the mechanical properties and corrosion resistance of the pipe.
It's essential to understand and specify the correct size terms when dealing with steel pipes to ensure they meet the required specifications and are suitable for the intended application.
Article source: https://article-realm.com/article/Business/49166-What-are-the-size-terms-of-steel-pipes.html
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