Casing pipes

Casing pipes and couplings for them. Diameters range between 4.1/2 inches (114.3 mm) and 13.5/8 inches (346.1 mm) in accordance with the standards GOST 632, API 5СТ. Steel grade – J55, K55, M65, N80, L80, C90, C95, T95, P110 in accordance with API, or D, E, K, L, M – GOST.