heat exchangers, ACC, Economizer, HRSG- Air heater by steam/ hot oil- Industrial dryers- Tank, silo & pressure vessels- Reactor, mixer, evaporator, & filter for chemical process- Piping service- Process control design- Biogas & Biomass process equipments- Waste heat

pressure vessel structure  shop fabrication petrochemical plant,  refinery plant, power plant, industrial factory and etc. code, standard  - asme b31.1 (power plant) - asme b31.3 (process piping) - asme b16.xx (vales, flanges, fittings, gaskets) - aws (american welding society)