GOST 20295:Steel welded tubes for gas and oil main pipelines
Description This standard is applied to steel longitudinally welded and spiral welded pipes. They are applied in gas/oil main lines, oil products pipelines, industrial and field pipelines. Tolerances by the pipe end outer diameter for type 2 with the diameter of 530 mm and higher and for type 3 (expanded) pipes must not exceed ±2.0 mm for standard accuracy and ±1.6 mm for increased accuracy. Steel grade is selected by the pipe manufacturer with the consideration of requirements to mechanical properties and restrictions concerning steel elements limits according to GOST 380, GOST 1050, and GOST 19281.