Why were 309+347 materials used in the PTA reactors of generations 5 to 8, and why was 309+C276 adopted starting with generation 8?
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Previously, in reactors using processes from generation 5 to 8, 309+347 was used; why was 309+C276 adopted starting with generation 8 processes?
In 2018, Lansi Heavy Equipment manufactured PTA reactors for Hengli Petrochemical. The hydrogenation reactors in this project have a diameter of 5400 mm, a wall thickness of 216 mm, and a weight of around 574 tons per unit. The inner walls are fully cladded with Hastelloy welding materials (E309L+C276), and advanced electromagnetic induction welding followed by heat treatment technology is used for the assembly joints – this represents the first application of such technology in China.
I’m very interested, so I came over specifically to find out what’s going on and get an expert to clarify it for me.