Lipetsk Pipe company Svobodny Sokol produces ductile iron fittings
the fittings comply with the ISO 2531 standard and ALL Uion State Standard (Russian ГОСТ) 5525-88.
Cement-mortar lining is applied to the inner surface of the pipes according to the ISO 4179 requirements.
The protective coating of bituminous paint and zinc is applied on outside surface of fittings.
The fittings shall bear paint or cast marks at the outside surface indicating: