37
Building construction; repair; installation services
maintenance, repair, and installation of refinery and petrochemical equipment, namely, exchangers, towers, furnaces, burners, heaters, valves, tanks, vessels, piping, pipelines, and reactor processing equipment; industrial maintenance turnaround services, namely, repair and maintenance of equipment and machinery in the refinery and petrochemical industries; consultancy in the fields of facility turnarounds, namely, consultation regarding the repair, maintenance and modification of industrial equipment and machinery in the refinery and petrochemical industries; consultancy regarding repair and maintenance of industrial equipment in the refinery and petrochemical industries, namely, exchangers, towers, furnaces, burners, heaters, valves, tanks, vessels, piping, pipelines, tank farms; maintenance of industrial facilities, namely, bundle extraction provided as maintenance of heat exchangers; repair and installation of industrial equipment in the refinery and petrochemical industries, namely, exchangers, towers, furnaces, burners, heaters, valves, tanks, vessels, piping, pipelines, and reactors; maintenance of industrial facilities, namely, catalyst handling in the nature of loading, unloading and screening of catalysts provided as maintenance of petrochemical refinery equipment; heat exchanger maintenance services in the nature of repair and installation of venting and plugging tubes and seal strips; industrial facility maintenance turnaround services, namely, repair and maintenance of petrochemical refinery equipment; repair of industrial heat exchangers, namely, coded weld repairs; maintenance and modification of industrial equipment and machinery in the refinery and petrochemical industries, namely, repair and modification of furnaces, boilers and heaters