The classification of pipes can be compiled not only by the type of material from which they are made, but also by size and purpose. The main characteristic feature of the tube 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 that comply with GOST.
Different diameters of steel products
The table of pipe diameters helps to calculate various values, according to the formula, adding its value from the table to them. Diameters are:
- domestic;
- outdoor;
- nominal;
- wall thickness.
The table of pipe diameters has the following concepts:
- The internal size of the steel product, which is determined in millimeters, is called the conditional pass. It is used to properly stack several pipes.
- The throughput and volume of a unit of production depends on the physical quantity, measured in millimeters, and called the pipe wall thickness. It is calculated by finding the difference between the outer and inner diameters.
- To determine the permeability 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 times 2.
- The outer diameter can have small sizes - 5 to 102 mm, medium - 103-426 mm and large - 427 or more mm.
- The nominal diameter has almost the same definition as the conditional pass, 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 with a wide range, plastic products are used in construction.
External and internal - such has a steel pipe diameters. A table with their values always helps builders to accurately determine the desired value for a positive result in their joining and welding.