1　Scope

This Specification covers the requirements for construction and acceptance for installation work of axial flow compressor-flue gas expander energy recovery train in fluidized catalytic cracking plant.

The Specification is applicable to the construction and acceptance of axial flow compressor-flue gas expander energy recovery train（hereinafter referred to as the machine train）consisting of AV type axial flow compressor，YL type flue gas expander，gearbox and motor/generator.