Diameter is one of the most important dimensional characteristics of steel pipes. Thanks to such parameter as diameter it is possible to make all necessary design calculations.
Standard diameters of steel pipes are strictly regulated by GOST 10704-91.
Purely conditionally diameters of pipes are divided into the following categories:
— big diameter (more than 508 millimeters),
— diameter of an average (114-530 millimeters)
— and small diameter (it is no more than 114 millimeters).