ISO 11299-3:2018

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Plastics piping systems for renovation of underground gas supply networks — Part 3: Lining with close-fit pipes

ISO 11299-3:2018 refers to an International Organization for Standardization (ISO) standard that specifies requirements and test methods for "plastics piping systems for renovation of underground gas supply networks," specifically focusing on "lining with close-fit pipes" as a method for renovating existing gas lines using plastic pipes that fit tightly within the existing pipework