... , 304 L, 410, 316, 316 L 2.Size:dia25,38,50mm 3.used in desulphurization Metal Cascade Ring Widely used in desulphurization ... in compound ammonia plant, decompressed plant and so on. Description:Metal ladder ring is a new type of hole-type packing , developed ... of rasching ring and its height-diameter ratio is 1:2.By increasing cone flanging , it can reduce the resistance of ...