This type of metalware includes general purpose hot-deformed seamless tubes from carbon and alloyed steel manufactured by its outside diameter, wall thickness and length as per GOST 8731-78 .
Gauge of tubes complies with GOST 8732-78 .
- off-gage - from 4 to 12,5 m ; ;
- gage – within off-gage.
By their length, the tubes are manufactures as:
Depending on quality indicators, the following types of tubes are manufactured: А, Б, В, Г, Д.
Depending on application and technical requirements, hot-rolled tubes are manufactured from steel grades with chemical composition as per GOST 380, GOST 1050, GOST 4543, GOST 19281. GOST 380 , GOST 1050 , GOST 4543 , GOST 19281 .
For more details see GOST norms & Technical Requirements section.