Classification for specialized equipment, apparatus, and systems for chemical industry plants. Includes machinery and equipment specialized for chemical product manufacturing processes such as chemical reactors, distillation columns, heat exchangers, separation equipment, mixers, reaction vessels, piping systems, control valves, pumps, and measuring instruments. Targets specialized equipment emphasizing corrosion resistance, heat resistance, and sealing properties used in chemical process industries including petrochemicals, pharmaceuticals, cosmetics, paints, and resin manufacturing, clearly distinguished from general machining equipment and assembly facilities.