——Design Unit: Qilu Petrochemical Design Institute——Project Name: New Materials and Hydrogen Energy Comprehensive Utilization Project 900,000 tons / year propane dehydrogenation unit Reactor high-temperature pipelines and fittings——Product name: Three major piping systems——Product specifications: DN2700 (maximum caliber)——Product material: WP321H, F321H, WP22, F22, WP310S, F310S——Prefabricated parts include parts and components: flanges, elbows, steel pipes, gaskets