Construction, installation, repair, maintenance, renovation and cleaning of pipelines for gas, water, and waste water; construction, installation, repair, maintenance, renovation and cleaning of flexible pipes and sheaths; pipe laying services; installation of fixtures and fittings for pipe; non-metal sewer pipe renovation; lagging of pipe being the services of insulating pipes; application of protective coatings to pipes; installation of insulation of pipes; pipeline laying; installation of pipeline insulation; construction, installation, repair and renovation services for pipeworks; pipework cleaning; advisory services relating to the renovation and restoration of trenches; trenchless pipe repair; renovation of underground pipes; repair and cleaning of tanks and manholes; construction consultancy in the field of water and gas pipes and pipelines; on-site supervision for construction, installation, repair, maintenance, renovation and cleaning of pipelines, flexible pipes and sheaths; application of protective coatings to drains; application of protective coatings to conduits; application of surface coatings to non-metallic pipes