FIELD: pipe line transport; study of corrosion processes inside pipes. SUBSTANCE: device includes shut-off device, housing, rod with seal and blank samples secured in it, nut and valve plate arranged in housing. Shut-off device is made in form of stack of sealing rings and bush located concentrically on pipe line for axial displacement. Rod is provided with threaded section passing through nut and plate secured in lower portion. EFFECT: enhanced reliability. 2 dwg
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