Section 11 Material certificates

11.1.1 Materials for Class I and II piping systems and components as defined in Table 1.3.1 Maximum pressure and temperature conditions for Class II and III piping systems, also for shell valves and fittings on the collision bulkhead are to be manufactured and tested in accordance with the Rules for the Manufacture, Testing and Certification of Materials, July 2022.

11.1.2 Materials for metallic castings and forgings for Class I and II piping systems are to be produced at a works approved by Lloyd’s Register (commonly referred to as ’LR’) and are to be tested in accordance with the Rules for the Manufacture, Testing and Certification of Materials, July 2022 (commonly referred to as the Rules for Materials).

11.1.3 Materials for Class III piping systems are to be manufactured and tested in accordance with the requirements of acceptable National Standards.

11.1.4 The Manufacturer's materials test certificate will be accepted for all classes of piping and components in lieu of an LR materials certificate where the maximum design conditions are less than shown in Table 1.11.1 Maximum conditions for pipes, valves and fittings for which Manufacturer's materials test certificate is acceptable.

11.2.1 Pipes and fittings intended for applications in Class I, Class II and Class III systems for which there are Rule requirements are to be manufactured in accordance with Ch 14 Plastics Materials and other Non-Metallic Materials of the Rules for Materials.