Table 2 summarises the selection of recommended coating systems, identified as PCS-1 to PCS-18, for the various structures, locations and service conditions. For painting and coating of package items and equipment coated at Vendors facilities alternatives to those shown below can be used provided they have similar or better performance capabilities to the approved coating and are endorsed by TA2 material and corrosion engineer. No alterations or changes may be made to the Paint and coating schedules (PCS) provided in this specification without prior approval of the Custodian of this Specification. The temperature selection should be based on maximum operating temperature of the system