NBN EN ISO 23936-2:2012

ISO 23936 describes general principles and gives requirements and recommendations for the selection and qualification of non-metallic materials for service in equipment used in oil and gas production environments, where the failure of such equipment could pose a risk to the health and safety of the public and personnel, or to the environment. It can be applied to help avoid failures of the equipment itself. It supplements, but does not replace, the material requirements given in the appropriate design codes, standards or regulations.
ISO 23936-2:2011 describes the requirements and procedures for qualification of elastomeric material used in equipment for oil and gas production.