FIELD: packing rings for polymer material pipes having external corrugations with gasket placed into corrugation hollows. SUBSTANCE: packing ring is made in the form of symmetrical packing ring having main seal in the form of washer-like ring for creation of sealing with respect to other pipe, and two supporting members projecting at sides from main member for resting on corrugations of corrugated pipe. EFFECT: higher sealing of joints. 5 cl, 3 dwg
