ISO 10221:1993

Ductile iron pipelines — Rubber sealing rings for pipelines carrying potable water

Lays down the material specifications of solid vulcanized rubber sealing rings and specifies requirements for their effect on the organoleptic properties (colour, taste and odour) and the total organic carbon content of water. In the case of composite seals (which comprise, e.g. both rigid and flexible rubbers), applies only to the requirement for their effect on the total organic carbon content of water.