Classification of pipes can be made not only by the type of material from which they are made, but also by size and purpose. The main characteristic feature of a pipe product is its diameter. The table of pipe diameters allows you to determine the length of the entire pipeline, the purpose, composition and characteristics of the substance transported by these products. These parameters are regulated and standardized by special documents corresponding to GOST.
Different diameters of steel products
The table of pipe diameters helps to calculate various values by adding its value from the table according to the formula. Diameters available:
- domestic;
- outer;
- nominal;
- wall thickness.
The table of pipe diameters has the following concepts:
- The internal size of a steel product, which is determined in millimeters, is called the conditional passage. It is used to properly join several pipes.
- The permeability and volume of a unit of production depends on a physical quantity measured in millimeters and called pipe wall thickness. It is calculated byfinding the difference between the outer and inner diameters.
- To determine the patency of the highway, a physical quantity expressed in millimeters is used. It is called the inner diameter. It is found as the difference between the outer diameter and the wall thickness multiplied by 2.
- The outer diameter can be small - 5 to 102 mm, medium - 103-426 mm and large - 427 mm or more.
- Nominal diameter has almost the same definition as nominal diameter, but its values are more accurate.
Varieties of pipe rolling
The table of pipe diameters is a normative document and is suitable for many types of pipe products. In addition to metal analogues, which have a large assortment, plastic products are used in construction.
External and internal - such a steel pipe has diameters. A table with their values always helps builders accurately determine the right value for a positive result in their docking and welding.
