TefMet-manufactured Lined Pipes, Pipe Fittings and Lined Valves are backwards traceable from the finished component to the manufacturing tests, processes and lining materials. Each spool has one flange stamped with the reference of the liner batch used in its construction. This provides traceability back to the liner manufactured, the tests undertaken and the materials certification of the polymer. FEP / PFA moulded products likewise are stamped with a mould reference which again provides traceability back to the manufacturing and test activities and the material certification of the polymers used.