This International Standard specifies a method for determination of the long-term hydrostatic strength of multilayer M pipes (metal) as well as multilayer P pipes (polymer).NOTE Acceptance of any inner layer (see definitions) made from a specific grade of material is subjected to the relevant product standard or system standard and the requirements detailed in that standard.
DS/ISO 17456:2007 history
2007DS/ISO 17456:2007 Plastics piping systems - Multilayer pipes - Determination of long-term strength