This DN-11 Serviflex checklist guides gas utility teams through the approved procedure for relining domestic service pipes. It covers site setup, service tracing and suitability checks, measuring and preparation, inserting the Serviflex using spring and towing head, securing the nose cone, advancing with pusher gripper, verifying insertion length, and ensuring adequate pipe condition for connections. It includes critical safety and quality checks such as rod tests for constrictions, the 100 mbar for 5 minutes no-drop pressure test, and non-expanding sealant injection with proper venting. The workflow concludes with commissioning to current SGN procedures, waste disposal, and documentation.
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