42.21 - Construction of utility projects for fluids

This class includes the construction of distribution lines for transportation of fluids and related buildings and structures that are integral part of these systems. This class includes: - construction of civil engineering constructions for: . long-distance and urban pipelines . water main and line construction . irrigation systems (canals) . reservoirs - construction of: . sewer systems, including repair . sewage disposal plants . pumping stations

This class excludes: - project management activities related to civil engineering works, see 71.12