37 Rental of equipment for construction, repair, installation and maintenance purposes, namely, nitrogen equipment in the nature of nitrogen pumping equipment, nitrogen boosters, nitrogen tanks and nitrogen membrane units, rigging lofts, tanks and hydraulic workshop containers in the nature of steel structures; rental of equipment for the construction, repair, installation and maintenance of cranes, pipes, tanks, hydraulic apparatus, mechanical machines and process equipment, namely, air filter lubricators in the nature of air filtering apparatus, air receivers in the nature of air filtering apparatus, breakers, descalers, cable jacks, cable rollers, diesel bowsers, air-powered and electric drills, air-powered and electric grinders, hydraulic equipment, multimeters, air saws, electric saws, scaffolding, threaders and winches; installation, commissioning, maintenance, servicing, repair, refurbishment, replacement, modification, upgrading and dismantling of hydraulic apparatus and hydraulic equipment, namely, hydraulic winches, personnel access baskets in the nature of elevating or lifting work platforms, hydraulic pumps and hydraulic power units; rental of hydraulic apparatus and equipment, namely, hydraulic winches, personnel access baskets in the nature of elevating or lifting work platforms, hydraulic pumps and hydraulic power units for the purposes of construction, repair, installation and maintenance; installation and commissioning of pipework and pipelines, lagging and lining of pipes and pipework, namely, covering and lining the interior of the pipes of others with a fluid impervious barrier and maintenance, servicing, cleaning, descaling, repair, refurbishment, replacement, modification, upgrading, decommissioning and dismantling pipes and pipelines; repair and refurbishment of accumulators; maintenance, servicing, repair, refurbishment, replacement, modification and upgrading of pipe handling equipment, including pipe clamps, pipe straighteners and pipe tensioners; installation of tubular linings in pipelines for others; installation, commissioning, maintenance, servicing, repair, refurbishment, replacement, modification, upgrading, dismantling of heat exchangers; construction of steel fabrications, namely, steel structures; cleaning of tanks and vessels, namely, storage tank cleaning and ship cleaning; cleaning by water jetting, namely, cleaning of metal surfaces; digging and excavation services; demolition services, namely, demolition of buildings; painting services; scaffolding services, namely, scaffolding erection and management; repair, lining and coating of concrete, namely, applying protective surfaces to concrete; providing information, advisory and consultancy services relating to all of the aforementioned services, and providing computerized information relating to all of the aforementioned services